Iulian Marcu

Staff Software Engineer with a decade of experience in web development, based in London, UK 💂🏼

Hi, my name is Iulian

I am an engineer at heart, passionate about the quality of my work.

I take a customer-centric approach, striving to understand the needs and problems of the end user. I take great satisfaction from overcoming tough challenges and building solutions that have a real, positive, impact on people's lives.

I enjoy collaboration, and helping other software engineers upskill by sharing my knowledge about systems design, software development best-practices, processes and healthy ways of working.

The expertise I have acquired throughout my professional journey gives me the confidence to approach any software products, and be involved in their formation from conception to completion.

LLM

Prompt Engineering

Typescript

React

Next.js

Deno

Node.js

NestJS

Docker

Kubernetes

Serverless

GCP

AWS

Tailwind CSS

CSS-in-JS

Ask AI about my experience

Please note that this is an AI model and may not always get the answer right

Raft.ai

Staff Fullstack Engineer

February 2025 - Present

Responsibilities:

Lead the planning of the data platform and product

Event driven architecture, linking multiple systems for extracting, processing and refining the data extracted from freight forwarding documents
architecture
Read more
Implement the authentication and authorisation

Integrate with Auth0 for a custom authn/z mechanism for account management, RBAC and tenant management. Integrated with Auth0's ACUL for custom auth experience.
system
Read more
Implement document reconstruction mechanism using graph

Created document reconstruction solution using Neo4j database to build a graph of relationships between documents
databases
Read more
Conduct code reviews in the engineering

Assisted the engineering teams through code reviews and pairing
teams
Read more

Typescript

React

Python

FastAPI

Terraform

Google Cloud Platform

LLM

Kafka

GitLab CI

ArgoCD

Kubernetes

Raft.ai

Staff Fullstack Engineer

February 2025 - Present

Responsibilities:

Lead the planning of the data platform and product

Event driven architecture, linking multiple systems for extracting, processing and refining the data extracted from freight forwarding documents
architecture
Read more
Implement the authentication and authorisation

Integrate with Auth0 for a custom authn/z mechanism for account management, RBAC and tenant management. Integrated with Auth0's ACUL for custom auth experience.
system
Read more
Implement document reconstruction mechanism using graph

Created document reconstruction solution using Neo4j database to build a graph of relationships between documents
databases
Read more
Conduct code reviews in the engineering

Assisted the engineering teams through code reviews and pairing
teams
Read more

Typescript

React

Python

FastAPI

Terraform

Google Cloud Platform

LLM

Kafka

GitLab CI

ArgoCD

Kubernetes

Popsa

Senior Software Engineer

May 2023 - September 2024

Responsibilities:

Built complex UI interactions and

In collaboration with designers, I worked on building custom animations for the product, to A/B test ways of improving the user experience.
animations
Read more
Improved the application stability and

I worked on improving a new feature by fixing a major performance issue. The fix leverages WebWorkers to parallelise repetitive work, and delivered a major 10-20x performance increase for the feature.
performance
Read more
Improved the application user

I worked on multiple features improving the user experience, including a redesigned sign-in flow supporting A/B tests, various marketing landing pages, UI components and performance improvements.
experience
Read more
Implemented Playwright application automated

I researched the Playwright testing framework, proposed patterns for writing scalable test, optimised the testing performance in the CI environment, and integrated them into our CI/CD pipeline.
testing
Read more
Integrated and conducted A/B

I integrated the Growthbook A/B testing platform and helped set up metrics in it by writing custom BigQuery SQL queries.
testing
Read more
Created a long-term CMS strategy to scale the company web

I integrated Storyblok CMS with the Next.js web application to empower the marketing team release campaigns, and I wrote a long-term strategy for scaling the Popsa web presence in a monorepo by adopting a design-system library and colocating projects.
presence
Read more

Vercel

Next.js

React

Typescript

Javascript

Storybook

Playwright

Storyblok CMS

Growthbook

Protobuf

Popsa

Senior Software Engineer

May 2023 - September 2024

Responsibilities:

Built complex UI interactions and

In collaboration with designers, I worked on building custom animations for the product, to A/B test ways of improving the user experience.
animations
Read more
Improved the application stability and

I worked on improving a new feature by fixing a major performance issue. The fix leverages WebWorkers to parallelise repetitive work, and delivered a major 10-20x performance increase for the feature.
performance
Read more
Improved the application user

I worked on multiple features improving the user experience, including a redesigned sign-in flow supporting A/B tests, various marketing landing pages, UI components and performance improvements.
experience
Read more
Implemented Playwright application automated

I researched the Playwright testing framework, proposed patterns for writing scalable test, optimised the testing performance in the CI environment, and integrated them into our CI/CD pipeline.
testing
Read more
Integrated and conducted A/B

I integrated the Growthbook A/B testing platform and helped set up metrics in it by writing custom BigQuery SQL queries.
testing
Read more
Created a long-term CMS strategy to scale the company web

I integrated Storyblok CMS with the Next.js web application to empower the marketing team release campaigns, and I wrote a long-term strategy for scaling the Popsa web presence in a monorepo by adopting a design-system library and colocating projects.
presence
Read more

Vercel

Next.js

React

Typescript

Javascript

Storybook

Playwright

Storyblok CMS

Growthbook

Protobuf

Picsart

Staff Software Engineer

October 2021 - April 2023

Responsibilities:

Conducted hiring interviews and

I was involved in interviewing and hiring senior engineers, as well as providing feedback to the hiring managers.
feedback
Read more
Built the tech stack powering SEO optimised React

Created a modern tech stack used by one of the teams in the company: a design system built with Storybook, 35+ SEO optimised React applications, a couple of Next.js applications, a Terraformed AWS serverless infrastructure, managed together in a Nx monorepo. The CI/CD environment was running in GitLab. The applications are serving 1.5M users every month.
applications
Read more
Introduced Nx monorepos and CI integration to accelerate the development

I integrated GitLab CI with Nx, and created an incremental deployment system. It scanned the monorepo and only ran the build, test, deploy pipeline on the changed applications. Using Nx became a necessity when we scaled from 5 to 35+ applications. Changes across multiple applications were slow, and we needed a way to manage the repositories. Nx helped us do this by enabling us to colocate the applications and design system, making changes in multiple applications easier and the code review process smoother.
speed
Read more
Built and managed the AWS Serverless

A Node.js Express API gateway and multiple asynchronous processing Lambdas are running in AWS Lambda. S3 provides storage, Lambda URLs availability, and Cloudflare security. The public-facing APIs authorize all requests via reCaptcha, and Cloudflare Workers handled the custom routing and serving the React application on the edge. A great challenge was integrating LibreOffice as a Lambda layer, in order to use it to convert documents.
infrastructure
Read more
Promoted best-practices for React and Next.js

I introduced the use of a design system in the team, to reduce the repetitive tasks and let the developers focus on building features. I also integrated and coached the team on code quality principles, linters, and formatters.
development
Read more
Onboarded new joiners and helped the team

I aligned the new joiners with the goals of our team, presenting the "why"s, "how"s, and our purpose. I introduced our technical stack to the developers, reviewed their code and provided feedback. I also organised a fortnightly meeting, where we presented ideas, or discussed topics of interest to the team. I also held a couple of tech talks to share my knowledge with the team.
upskill
Read more
Worked with the leadership team towards the company

I worked in alignment with the company goals, with engineering managers, directors and the rest of the tech leadership team, on key projects of the business.
goals
Read more
Collaborated in a multi-disciplinary team of the company's top

I collaborated with other Senior and Staff Engineers to deliver a cross-platform features platform, accelerating the delivery of features via web technologies inside our native applications.
talent
Read more
Wrote technical documentation and technical

I wrote overviews of solutions to upcoming challenges, where I presented the problem, came up with solutions, compared them and made an informed decision on the best candidate.
proposals
Read more
Built a cross-platform Javascript feature development platform

This project allowed developers to write Javascript code that would run cross-platform in our applications. Here, I explored and learned about solutions like virtual UI trees, communication with iframes, the development of SDKs and writing developer documentation.

Read more
Supported teams across the business with technical

I helped other teams in the company with: advice on systems design, performance optimisations, code review, coaching and hiring.
expertise
Read more
Advocated for the adoption of healthy Agile

I advocate the implementation of Agile practices like Definition of Done, Definition of Ready, velocity tracking, and the Scrum or Kanban framework. Using these practices helps teams deliver value faster and stay aligned with the business requirements, avoiding the friction created otherwise.
practices
Read more

GitLab

AWS

Cloudflare Workers

Terraform

Node.js

React

Next.js

Jest

Cypress

Storybook

Typescript

Javascript

CSS

Picsart

Staff Software Engineer

October 2021 - April 2023

Responsibilities:

Conducted hiring interviews and

I was involved in interviewing and hiring senior engineers, as well as providing feedback to the hiring managers.
feedback
Read more
Built the tech stack powering SEO optimised React

Created a modern tech stack used by one of the teams in the company: a design system built with Storybook, 35+ SEO optimised React applications, a couple of Next.js applications, a Terraformed AWS serverless infrastructure, managed together in a Nx monorepo. The CI/CD environment was running in GitLab. The applications are serving 1.5M users every month.
applications
Read more
Introduced Nx monorepos and CI integration to accelerate the development

I integrated GitLab CI with Nx, and created an incremental deployment system. It scanned the monorepo and only ran the build, test, deploy pipeline on the changed applications. Using Nx became a necessity when we scaled from 5 to 35+ applications. Changes across multiple applications were slow, and we needed a way to manage the repositories. Nx helped us do this by enabling us to colocate the applications and design system, making changes in multiple applications easier and the code review process smoother.
speed
Read more
Built and managed the AWS Serverless

A Node.js Express API gateway and multiple asynchronous processing Lambdas are running in AWS Lambda. S3 provides storage, Lambda URLs availability, and Cloudflare security. The public-facing APIs authorize all requests via reCaptcha, and Cloudflare Workers handled the custom routing and serving the React application on the edge. A great challenge was integrating LibreOffice as a Lambda layer, in order to use it to convert documents.
infrastructure
Read more
Promoted best-practices for React and Next.js

I introduced the use of a design system in the team, to reduce the repetitive tasks and let the developers focus on building features. I also integrated and coached the team on code quality principles, linters, and formatters.
development
Read more
Onboarded new joiners and helped the team

I aligned the new joiners with the goals of our team, presenting the "why"s, "how"s, and our purpose. I introduced our technical stack to the developers, reviewed their code and provided feedback. I also organised a fortnightly meeting, where we presented ideas, or discussed topics of interest to the team. I also held a couple of tech talks to share my knowledge with the team.
upskill
Read more
Worked with the leadership team towards the company

I worked in alignment with the company goals, with engineering managers, directors and the rest of the tech leadership team, on key projects of the business.
goals
Read more
Collaborated in a multi-disciplinary team of the company's top

I collaborated with other Senior and Staff Engineers to deliver a cross-platform features platform, accelerating the delivery of features via web technologies inside our native applications.
talent
Read more
Wrote technical documentation and technical

I wrote overviews of solutions to upcoming challenges, where I presented the problem, came up with solutions, compared them and made an informed decision on the best candidate.
proposals
Read more
Built a cross-platform Javascript feature development platform

This project allowed developers to write Javascript code that would run cross-platform in our applications. Here, I explored and learned about solutions like virtual UI trees, communication with iframes, the development of SDKs and writing developer documentation.

Read more
Supported teams across the business with technical

I helped other teams in the company with: advice on systems design, performance optimisations, code review, coaching and hiring.
expertise
Read more
Advocated for the adoption of healthy Agile

I advocate the implementation of Agile practices like Definition of Done, Definition of Ready, velocity tracking, and the Scrum or Kanban framework. Using these practices helps teams deliver value faster and stay aligned with the business requirements, avoiding the friction created otherwise.
practices
Read more

GitLab

AWS

Cloudflare Workers

Terraform

Node.js

React

Next.js

Jest

Cypress

Storybook

Typescript

Javascript

CSS

Geotab

Team Lead

September 2020 - January 2022

Responsibilities:

Led a full-stack engineering

I was responsible the wellbeing and performance of 6 engineers. I was holding one to one meetings with them in which we were discussing performance, their needs, and I was guiding them through their career path. I was working closely with my manager and the department director to plan the pear-pairing groups, the product roadmap, and provide technical guidance. I also conducted performance reviews and helped the engineers plan and align their goals.
team
Read more
Mentored junior developers to help them

I pair-programmed with one of the most junior members of the team for 6 months to coach him into Angular development. We worked together on advanced UI features, including large data forms with custom field types, interactive user interfaces and work on a design system. I was pleased to see him grow from an Angular beginner to a confident developer, able to work on complex features on his own.
upskill
Read more
Promoted the adoption of department-wide 360

The team was working in pairs, and I thought that we can increase the team cohesion by introducing a formal feedback system, for the engineers to share their feedback with each other after pairing. I proposed the implementation of 360 degree feedback and helped the team implement it. The engineers shared feedback that helped them set their goals, I was able to use the engineers feedbacks during the performance reviews.
feedback
Read more
Implemented a design system for the

After working in the team for a few months, I identified a bottleneck in development caused by the lack of reusable components. I proposed the implementation of a design system, investigated the approach that would work the best with our setup, and helped the team implement it. Since we were using Angular Material, the implementation was a mix of SCSS theming the Angular Material components and creating component wrappers for more complex components. Finally, I created a Storybook showcase for their documentation.
department
Read more
Facilitated backlog planning by providing technical

I went to meetings with the product manager, our tech lead and product director to plan our quarterly goals and roadmap. I was also working with the product manager to break the application designs into features and stories, and with the tech lead to propose technical solutions for the future challenges.
expertise
Read more
Built an end-to-end automated testing

I saw an opportunity in our setup and a need in the business to migrate to automated end-to-end tests. I built a custom Gitlab CI/CD pipeline, using Nx, that ran all the service dependencies of an application, and then end-to-end tested the product via Cypress tests. This was integrated then with our existing CI/CD setup.
environment
Read more
Applied pair-programming as the main way of

The team was distributed across the world, so we relied on pair programming as a way of working. This approach impproved the shared knowledge of the team, as multiple people were working on the same codebase; it also improved the quality of the code, as we were constantly reviewing each other's code.
working
Read more
Built full-stack B2B web

My resposibilities included working full-stack on creating new applications or building application features. We used NestJS in the backend, with persistence layers in Postgres and Redis. I built microservices that either had a Postgres database with a CRUD API service serving it, or domain-specific REST services aggregating the CRUD API services. The services were deployed in Docker containers, running on Kubernetes in GCP. The frontend was built with Angular, using Typescript and SCSS, as well as heavily interactive Konva components. We used Gitlab for CI/CD, Jest for unit testing and Cypress for end-to-end testing.
applications
Read more
Created a highly-interactive schedule planner with Angular and

I built an canvas schedule editor, that was presenting in a timeline hundreds of interactive, draggable, animated elements. The schedule editor had to run in real-time, meaning that performance was a top priority. This project was a great opportunity to learn details about the Konva library, as well as to apply software best practices, like reactivity with RxJS and the Observer, Builder, Factory and Singleton design patterns.
Konva
Read more

GCP

Docker

Kubernetes

Typescript

Javascript

Node.js

NestJS

Angular

Konva

PostgreSQL

GitLab

Cypress

Geotab

Team Lead

September 2020 - January 2022

Responsibilities:

Led a full-stack engineering

I was responsible the wellbeing and performance of 6 engineers. I was holding one to one meetings with them in which we were discussing performance, their needs, and I was guiding them through their career path. I was working closely with my manager and the department director to plan the pear-pairing groups, the product roadmap, and provide technical guidance. I also conducted performance reviews and helped the engineers plan and align their goals.
team
Read more
Mentored junior developers to help them

I pair-programmed with one of the most junior members of the team for 6 months to coach him into Angular development. We worked together on advanced UI features, including large data forms with custom field types, interactive user interfaces and work on a design system. I was pleased to see him grow from an Angular beginner to a confident developer, able to work on complex features on his own.
upskill
Read more
Promoted the adoption of department-wide 360

The team was working in pairs, and I thought that we can increase the team cohesion by introducing a formal feedback system, for the engineers to share their feedback with each other after pairing. I proposed the implementation of 360 degree feedback and helped the team implement it. The engineers shared feedback that helped them set their goals, I was able to use the engineers feedbacks during the performance reviews.
feedback
Read more
Implemented a design system for the

After working in the team for a few months, I identified a bottleneck in development caused by the lack of reusable components. I proposed the implementation of a design system, investigated the approach that would work the best with our setup, and helped the team implement it. Since we were using Angular Material, the implementation was a mix of SCSS theming the Angular Material components and creating component wrappers for more complex components. Finally, I created a Storybook showcase for their documentation.
department
Read more
Facilitated backlog planning by providing technical

I went to meetings with the product manager, our tech lead and product director to plan our quarterly goals and roadmap. I was also working with the product manager to break the application designs into features and stories, and with the tech lead to propose technical solutions for the future challenges.
expertise
Read more
Built an end-to-end automated testing

I saw an opportunity in our setup and a need in the business to migrate to automated end-to-end tests. I built a custom Gitlab CI/CD pipeline, using Nx, that ran all the service dependencies of an application, and then end-to-end tested the product via Cypress tests. This was integrated then with our existing CI/CD setup.
environment
Read more
Applied pair-programming as the main way of

The team was distributed across the world, so we relied on pair programming as a way of working. This approach impproved the shared knowledge of the team, as multiple people were working on the same codebase; it also improved the quality of the code, as we were constantly reviewing each other's code.
working
Read more
Built full-stack B2B web

My resposibilities included working full-stack on creating new applications or building application features. We used NestJS in the backend, with persistence layers in Postgres and Redis. I built microservices that either had a Postgres database with a CRUD API service serving it, or domain-specific REST services aggregating the CRUD API services. The services were deployed in Docker containers, running on Kubernetes in GCP. The frontend was built with Angular, using Typescript and SCSS, as well as heavily interactive Konva components. We used Gitlab for CI/CD, Jest for unit testing and Cypress for end-to-end testing.
applications
Read more
Created a highly-interactive schedule planner with Angular and

I built an canvas schedule editor, that was presenting in a timeline hundreds of interactive, draggable, animated elements. The schedule editor had to run in real-time, meaning that performance was a top priority. This project was a great opportunity to learn details about the Konva library, as well as to apply software best practices, like reactivity with RxJS and the Observer, Builder, Factory and Singleton design patterns.
Konva
Read more

GCP

Docker

Kubernetes

Typescript

Javascript

Node.js

NestJS

Angular

Konva

PostgreSQL

GitLab

Cypress

OVO Energy / Kaluza

Senior Software Engineer

February 2018 - August 2020

Responsibilities:

Built an event driven, highly scalable energy billing

We created an energy platform that was consuming >100M industry data points per day, serving >3.5M customers in the UK. The platform was built around and driven by Kafka, with each team owning a slice of the platform. Every team was autonomous, the infrastructure was Terraformed in GCP or AWS, and there was a selection of languages used across the platform, including Scala, Clojure, Node.js, Python, and Java.
platform
Read more
Owned the user-facing slice of the

I was part of a small team of 4-6 engineers, on the customer-facing web application, serving them as an energy dashboard. We built an interactive React application with Typescript, that was presenting data fetched from the REST APIs we owned, in an accessible, easy to understand way. During the development, we built a Storybook design system, and we were using Jest and Cypress for testing. The application was deployed in Docker containers containing the built files and an NGINX web server.
platform
Read more
Processed high-throughput platform data with Kafka and

As the platform was event driven, I upskilled in Kafka and PostgreSQL to build performant Node.js data consumers and producers. For this, I also had to learn how to efficiently use Node.js streams, about which I later held an internal tech talk.
Postgres
Read more
Advocated for the adoption of Node.js to increase the team

Initially, the team had a Scala backend. In order to decrease (and eventually remove) the friction created by having different people work in different languages, I introduced Node.js to the team and helped them upskill. The already existing Javascript experience in the team made the process quick, and it helped greatly increase the feature delivery speed.
velocity
Read more
Wrote comprehensive test suites for the

The application was tested with over 90% code coverage, using Jest for unit testing and Cypress for automated testing.
product
Read more
Managed a modern infrastructure in GCP/AWS via

I worked with Kubernetes on a daily basis, setting up new services or debugging existing ones, initialy via Terminal, then via PRs in a GitOps repository automated by Flux. Later on, we introduced Terraform for Infrastructure as Code.
Terraform
Read more
Took part in brainstorming, researching and testing of new

As this was a greenfield project, we were constantly experimenting with new ideas, and I had the chance to work hands-on with the UX designers and researchers in the company. I helped them build prototypes, A/B test features and assist in research.
features
Read more
Collaborated with the UI/UX team to achieve an optimal user

In order to enable experimenting, the team decided to take an incremental design approach. Therefore, it was a common practice to collaborate with UX designers, analyse user feedback, provide own feedback and iterate on the product.
experience
Read more
Delivered innovative ideas with measurable positive impact on the

During the 10% time that the company was offering to upskill, I built an interactive Direct Debit calculator for the customer, using the data available in the system. It was later A/B tested and proved to increase the conversion rates of customers correcting their Direct Debits.
customer
Read more
Conducted hiring interviews and provided

I was part of the interview panel for the new engineers joining the department. My responsibilities were interviewing and providing feedback during the decision making process.
feedback
Read more
Conducted code reviews inside and outside the

All engineers in the team were required to review each others code. We had feature branches on which we were working on, and we were required to open a PR for each feature. The PRs were reviewed by at least one other engineer, and we were providing feedback and suggestions.
team
Read more
Cross-trained with other teams to share and acquire technical

In order to broaden my domain knowledge, help other teams, and learn Clojure, I decided to temporarily move to other teams in the platform. First, the internal tooling team, where I was helping with the development of a new React internal tool and wrote Clojure to implement features in backend microservices. Afterwards, I moved to a data processing / backend team, where I worked exclusively with Clojure, helping them build Kafka data processors, and add features in their backend service. After the secondment I decided to move in this team permanently, as I enjoyed working with Clojure and the new business challenges.
skills
Read more
Expanded my technical skills to increase my impact on the

There were occasions when our team was blocked by other teams. In order to help them, and unblock ourselves, I learned Scala and Clojure, and I was able to contribute to their codebases to develop cross-team spanning features.
projects
Read more

GCP

AWS

Docker

Kubernetes

Terraform

Kafka

Typescript

Javascript

Clojure

Scala

Python

Node.js

Express

React

Redux

PostgreSQL

CircleCI

Cypress

Usabilla

OVO Energy / Kaluza

Senior Software Engineer

February 2018 - August 2020

Responsibilities:

Built an event driven, highly scalable energy billing

We created an energy platform that was consuming >100M industry data points per day, serving >3.5M customers in the UK. The platform was built around and driven by Kafka, with each team owning a slice of the platform. Every team was autonomous, the infrastructure was Terraformed in GCP or AWS, and there was a selection of languages used across the platform, including Scala, Clojure, Node.js, Python, and Java.
platform
Read more
Owned the user-facing slice of the

I was part of a small team of 4-6 engineers, on the customer-facing web application, serving them as an energy dashboard. We built an interactive React application with Typescript, that was presenting data fetched from the REST APIs we owned, in an accessible, easy to understand way. During the development, we built a Storybook design system, and we were using Jest and Cypress for testing. The application was deployed in Docker containers containing the built files and an NGINX web server.
platform
Read more
Processed high-throughput platform data with Kafka and

As the platform was event driven, I upskilled in Kafka and PostgreSQL to build performant Node.js data consumers and producers. For this, I also had to learn how to efficiently use Node.js streams, about which I later held an internal tech talk.
Postgres
Read more
Advocated for the adoption of Node.js to increase the team

Initially, the team had a Scala backend. In order to decrease (and eventually remove) the friction created by having different people work in different languages, I introduced Node.js to the team and helped them upskill. The already existing Javascript experience in the team made the process quick, and it helped greatly increase the feature delivery speed.
velocity
Read more
Wrote comprehensive test suites for the

The application was tested with over 90% code coverage, using Jest for unit testing and Cypress for automated testing.
product
Read more
Managed a modern infrastructure in GCP/AWS via

I worked with Kubernetes on a daily basis, setting up new services or debugging existing ones, initialy via Terminal, then via PRs in a GitOps repository automated by Flux. Later on, we introduced Terraform for Infrastructure as Code.
Terraform
Read more
Took part in brainstorming, researching and testing of new

As this was a greenfield project, we were constantly experimenting with new ideas, and I had the chance to work hands-on with the UX designers and researchers in the company. I helped them build prototypes, A/B test features and assist in research.
features
Read more
Collaborated with the UI/UX team to achieve an optimal user

In order to enable experimenting, the team decided to take an incremental design approach. Therefore, it was a common practice to collaborate with UX designers, analyse user feedback, provide own feedback and iterate on the product.
experience
Read more
Delivered innovative ideas with measurable positive impact on the

During the 10% time that the company was offering to upskill, I built an interactive Direct Debit calculator for the customer, using the data available in the system. It was later A/B tested and proved to increase the conversion rates of customers correcting their Direct Debits.
customer
Read more
Conducted hiring interviews and provided

I was part of the interview panel for the new engineers joining the department. My responsibilities were interviewing and providing feedback during the decision making process.
feedback
Read more
Conducted code reviews inside and outside the

All engineers in the team were required to review each others code. We had feature branches on which we were working on, and we were required to open a PR for each feature. The PRs were reviewed by at least one other engineer, and we were providing feedback and suggestions.
team
Read more
Cross-trained with other teams to share and acquire technical

In order to broaden my domain knowledge, help other teams, and learn Clojure, I decided to temporarily move to other teams in the platform. First, the internal tooling team, where I was helping with the development of a new React internal tool and wrote Clojure to implement features in backend microservices. Afterwards, I moved to a data processing / backend team, where I worked exclusively with Clojure, helping them build Kafka data processors, and add features in their backend service. After the secondment I decided to move in this team permanently, as I enjoyed working with Clojure and the new business challenges.
skills
Read more
Expanded my technical skills to increase my impact on the

There were occasions when our team was blocked by other teams. In order to help them, and unblock ourselves, I learned Scala and Clojure, and I was able to contribute to their codebases to develop cross-team spanning features.
projects
Read more

GCP

AWS

Docker

Kubernetes

Terraform

Kafka

Typescript

Javascript

Clojure

Scala

Python

Node.js

Express

React

Redux

PostgreSQL

CircleCI

Cypress

Usabilla

mobi.corp

Javascript Software Architect

May 2017 - December 2017

Responsibilities:

Built backend services in a microservices

I worked on full-stack features of different applications. The backend was built with Node.js and Express, with persistence layers in Microsoft SQL Server and caching in Redis. We built a microservices architecture, where we had CRUD API services serving their own database, and domain-specific services aggregating the CRUD API services. The services were deployed as Docker containers via Docker Swarm.
architecture
Read more
Built frontend React

The applications were server-side rendered with React and Node.js. Most of the applications included custom data visualisations as SVG elements, large data tables and complex forms. Later on, we built a real-time, highly interactive, dispatcher dashboard.
applications
Read more
Worte comprehensive test suites for the supported

We used Mocha, Chai and Sinon for unit testing. The same technologies, and docker-compose were used for intergation testing in the CI/CD environment.
features
Read more
Built a distributed, weakly coupled

We were processing GPS data in real time, by consuming it from Kafka topics and storing the processed results in databases, to be used by our collection of microservices.
system
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Applied pair-programming as the main way of

The team was distributed across the world, so we relied on pair programming as a way of working. This approach impproved the shared knowledge of the team, as multiple people were working on the same codebase; it also improved the quality of the code, as we were constantly reviewing each other's code.
working
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Collaborated with the UI/UX team to deliver the best user

I collaborated with our designer to create the branding of our products. I was also using my technical expertise, experience with other CSS frameworks and best practices in frontend development to provide technical feedback and suggestions to our designs.
experience
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Supported other team members with UI development

Having valuable past experience, I was able to help my team with UI development by promoting best practices, doing code reviews and mentoring junior developers. I became the go-to person in the team for UI related questions and feedback.
expertise
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Docker

Jenkins

Kafka

Microsoft SQL Server

Redis

Typescript

Javascript

Java

Express

React

Redux

mobi.corp

Javascript Software Architect

May 2017 - December 2017

Responsibilities:

Built backend services in a microservices

I worked on full-stack features of different applications. The backend was built with Node.js and Express, with persistence layers in Microsoft SQL Server and caching in Redis. We built a microservices architecture, where we had CRUD API services serving their own database, and domain-specific services aggregating the CRUD API services. The services were deployed as Docker containers via Docker Swarm.
architecture
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Built frontend React

The applications were server-side rendered with React and Node.js. Most of the applications included custom data visualisations as SVG elements, large data tables and complex forms. Later on, we built a real-time, highly interactive, dispatcher dashboard.
applications
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Worte comprehensive test suites for the supported

We used Mocha, Chai and Sinon for unit testing. The same technologies, and docker-compose were used for intergation testing in the CI/CD environment.
features
Read more
Built a distributed, weakly coupled

We were processing GPS data in real time, by consuming it from Kafka topics and storing the processed results in databases, to be used by our collection of microservices.
system
Read more
Applied pair-programming as the main way of

The team was distributed across the world, so we relied on pair programming as a way of working. This approach impproved the shared knowledge of the team, as multiple people were working on the same codebase; it also improved the quality of the code, as we were constantly reviewing each other's code.
working
Read more
Collaborated with the UI/UX team to deliver the best user

I collaborated with our designer to create the branding of our products. I was also using my technical expertise, experience with other CSS frameworks and best practices in frontend development to provide technical feedback and suggestions to our designs.
experience
Read more
Supported other team members with UI development

Having valuable past experience, I was able to help my team with UI development by promoting best practices, doing code reviews and mentoring junior developers. I became the go-to person in the team for UI related questions and feedback.
expertise
Read more

Docker

Jenkins

Kafka

Microsoft SQL Server

Redis

Typescript

Javascript

Java

Express

React

Redux

1&1 Internet Development

Web Developer

September 2015 - June 2017

Responsibilities:

Maintained the legacy application with bugfixes and

The legacy application was built with Node.js and RainJS, a custom full-stack framework that was built in-house. Because it was not scaling as well as modern technologies, the team decided to migrate to a new technical stack based around Spring Boot and EmberJS.
features
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Built a modern web application with

The frontend was rebuilt using EmberJS. It was consuming data from the REST APIs provided by the backend. The team built a mobile-first, responsive, SCSS design system that was used across the application.
EmberJS
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Built a scalable and performant backend application with Spring

The backend of the application was built with Spring Boot and Java 8. It provided features like REST APIs, feature toggling, caching, data prefetching and other optimisations.
Boot
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Employed NoSQL database technology for caching and data

We built a caching layer at the API gateway level, using Redis, which helped us reduce the response times and implement advanced optimization features, for example waiting for identical requests that are in progress and reusing their response. We also had tons of analytics data to store, and we chose MongoDB for this, especially for its scaling capabilities.
persistence
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Built a web monitoring system for the application

This system was built with Spring Boot and MongoDB for the backend, EmberJS for frontend, and vanilla Javascript for the tracking script. The interface was providing a dashboard of sessions, events and users, with the ability to group, filter and sort by the event parameters. It also provided a D3.js heatmap of the user interactions. The tracking script was sending events to the backend, which was storing them in the database, to be used by the dashboard.
stack
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Implemented a custom deployment system with

We had a QA engineer that was checking our work, and, in order to provide testing stages to them, I created a Jenkins job that would create one by spawning the application processes on different ports of a remote server. The job was allowing the cleanup of stages by storing each stage info in files on server and reading them upon action in Jenkins.
Jenkins
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Adopted latest technologies to deliver new products and

The backend was built with Java and Spring Boot. In the frontend I worked with Javascript, Rain (internal full-stack framework) and EmberJS. There was a secondary project in which we experimented using Python and Bottle for the backed, and Bash was used for deployment and local scrips.
features
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Applying Agile methodologies and proactively contributed to

I participated in all the standard Scrum meetings. I was especially getting involved in our refinement sessions, bringing up ideas and suggestions for the product.
meetings
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Organised and presented ideas at internal tech

We organised meetings in the department fortnightly, where we were presenting technical topics. I presented a Javascript HTTP request generator based solely on the function name, built to be used in our product. I also held a live coding session in which I built a Snake game in Javascript, using HTML canvas.
talks
Read more

Jenkins

MongoDB

Memcached

Java

Python

Javascript

Node.js

Express

Spring Boot

Bottle

EmberJS

Socket.io

Redis

1&1 Internet Development

Web Developer

September 2015 - June 2017

Responsibilities:

Maintained the legacy application with bugfixes and

The legacy application was built with Node.js and RainJS, a custom full-stack framework that was built in-house. Because it was not scaling as well as modern technologies, the team decided to migrate to a new technical stack based around Spring Boot and EmberJS.
features
Read more
Built a modern web application with

The frontend was rebuilt using EmberJS. It was consuming data from the REST APIs provided by the backend. The team built a mobile-first, responsive, SCSS design system that was used across the application.
EmberJS
Read more
Built a scalable and performant backend application with Spring

The backend of the application was built with Spring Boot and Java 8. It provided features like REST APIs, feature toggling, caching, data prefetching and other optimisations.
Boot
Read more
Employed NoSQL database technology for caching and data

We built a caching layer at the API gateway level, using Redis, which helped us reduce the response times and implement advanced optimization features, for example waiting for identical requests that are in progress and reusing their response. We also had tons of analytics data to store, and we chose MongoDB for this, especially for its scaling capabilities.
persistence
Read more
Built a web monitoring system for the application

This system was built with Spring Boot and MongoDB for the backend, EmberJS for frontend, and vanilla Javascript for the tracking script. The interface was providing a dashboard of sessions, events and users, with the ability to group, filter and sort by the event parameters. It also provided a D3.js heatmap of the user interactions. The tracking script was sending events to the backend, which was storing them in the database, to be used by the dashboard.
stack
Read more
Implemented a custom deployment system with

We had a QA engineer that was checking our work, and, in order to provide testing stages to them, I created a Jenkins job that would create one by spawning the application processes on different ports of a remote server. The job was allowing the cleanup of stages by storing each stage info in files on server and reading them upon action in Jenkins.
Jenkins
Read more
Adopted latest technologies to deliver new products and

The backend was built with Java and Spring Boot. In the frontend I worked with Javascript, Rain (internal full-stack framework) and EmberJS. There was a secondary project in which we experimented using Python and Bottle for the backed, and Bash was used for deployment and local scrips.
features
Read more
Applying Agile methodologies and proactively contributed to

I participated in all the standard Scrum meetings. I was especially getting involved in our refinement sessions, bringing up ideas and suggestions for the product.
meetings
Read more
Organised and presented ideas at internal tech

We organised meetings in the department fortnightly, where we were presenting technical topics. I presented a Javascript HTTP request generator based solely on the function name, built to be used in our product. I also held a live coding session in which I built a Snake game in Javascript, using HTML canvas.
talks
Read more

Jenkins

MongoDB

Memcached

Java

Python

Javascript

Node.js

Express

Spring Boot

Bottle

EmberJS

Socket.io

Redis

Wave Motion Labs

Fullstack Software Engineer

January 2014 - March 2016

Responsibilities:

Administrated a CouchDB

We used CouchDB for storing data for our web application. The main reason for choosing it was that it is a NoSQL database that allowed the flexibility we needed to move quickly. I was building features based on CRUD operations, full-text search and data aggregation.
database
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Built RESTful APIs with Node.js and

Node.js was a new technology at the time and it seemed very promising because of the speed of development that was achieved using it. We used Express to set up a REST API that was containing all our business logic, as well as registration and authentication routes. Socket.io was powering the web WebSocket communication and the service was also integrated with Google Push Notifications to enable the realtime features of the app..
Express
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Built JQuery Mobile and AngularJS web

Initially, we had two JQuery web applications, one for customers and the other one for the waiters. They were later migrated to a more maintainable AngularJS codebase. There was also the admin dashboard which was using AngularJS too. The applications were fetching data in realtime, via Socket.io WebSockets. The customer application had a (extremely unpopular at the time) QR code reader feature, which was the start of the user journey.
applications
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Built an Android application with Java and the Android

I was the sole developer of the Android application. It was built using Java and the Android SDK. It was using the same REST API as the web applications, but instead of Socket.io, it used Google Cloud Notifications for the realtime communication.
SDK
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Designed the UI/UX of the web and mobile

We lacked a UI designer, so I had to improvise and build the application design myself. For this, I researched the Material Design guidelines at that time, and used them as starting point for the designs.
applications
Read more

JQuery Mobile

AngularJS

Express

Javascript

Java

Android

Node.js

CouchDB

Socket.io

Wave Motion Labs

Fullstack Software Engineer

January 2014 - March 2016

Responsibilities:

Administrated a CouchDB

We used CouchDB for storing data for our web application. The main reason for choosing it was that it is a NoSQL database that allowed the flexibility we needed to move quickly. I was building features based on CRUD operations, full-text search and data aggregation.
database
Read more
Built RESTful APIs with Node.js and

Node.js was a new technology at the time and it seemed very promising because of the speed of development that was achieved using it. We used Express to set up a REST API that was containing all our business logic, as well as registration and authentication routes. Socket.io was powering the web WebSocket communication and the service was also integrated with Google Push Notifications to enable the realtime features of the app..
Express
Read more
Built JQuery Mobile and AngularJS web

Initially, we had two JQuery web applications, one for customers and the other one for the waiters. They were later migrated to a more maintainable AngularJS codebase. There was also the admin dashboard which was using AngularJS too. The applications were fetching data in realtime, via Socket.io WebSockets. The customer application had a (extremely unpopular at the time) QR code reader feature, which was the start of the user journey.
applications
Read more
Built an Android application with Java and the Android

I was the sole developer of the Android application. It was built using Java and the Android SDK. It was using the same REST API as the web applications, but instead of Socket.io, it used Google Cloud Notifications for the realtime communication.
SDK
Read more
Designed the UI/UX of the web and mobile

We lacked a UI designer, so I had to improvise and build the application design myself. For this, I researched the Material Design guidelines at that time, and used them as starting point for the designs.
applications
Read more

JQuery Mobile

AngularJS

Express

Javascript

Java

Android

Node.js

CouchDB

Socket.io

Wave Motion Labs

Freelance Project

May 2017 - July 2017

I built a system for file sharing, audio & video calling and text messaging using web technologies. I created a Node.js microservice to handle the pairing of sessions. The service was infinitely scalable, communicating via Redis pub-sub with the other microservices and via Socket.io with the frontend. The user sessions themselves were connected peer-to-peer, via WebRTC. The system was delivered in a Docker container.

Docker

Redis

Node.js

Express

Javascript

WebRTC

Socket.io

Wave Motion Labs

Freelance Project

May 2017 - July 2017

Docker

Redis

Node.js

Express

Javascript

WebRTC

Socket.io

Wave Motion Labs

Freelance Project

December 2016 - February 2017

I built a Salesforce ticket integration system. The web application was driven by RabbitMQ queues, a MySQL database, a Node.js backend and a simple React user interface, integrated in Salesforce via an iframe. The system was delivered and deployed in the cloud using Docker images.

React

Node.js

Express

MySQL

RabbitMQ

Docker

Salesforce

Javascript

Wave Motion Labs

Freelance Project

December 2016 - February 2017

React

Node.js

Express

MySQL

RabbitMQ

Docker

Salesforce

Javascript

Wave Motion Labs

Freelance Project

February 2016 - November 2016

Developed a full-stack internal social network for a client, featuring a CouchDB database, Node.js backend, AngularJS web interface, and a native Android application (Java). Implemented role-based access control for content management by administrators. Deployed the web application on a cloud-based dedicated server and published the Android application on the Google Play Store.

CouchDB

Node.js

Express

AngularJS

Android

Java

Javascript

Wave Motion Labs

Freelance Project

February 2016 - November 2016

CouchDB

Node.js

Express

AngularJS

Android

Java

Javascript

1&1 Internet Development

Internship

January 2014 - March 2014

I participated to an internship, during which, as part of a team of 4 members, I built a web application for personal expense tracking. I used MySQL as a database, Flask and Python for the backend and AngularJS for the frontend. The team was self-organised and we had to manage the project ourselves, asking for technical guidance from engineers from within the company.

MySQL

Flask

AngularJS

Python

Javascript

HTML

CSS

1&1 Internet Development

Internship

January 2014 - March 2014

MySQL

Flask

AngularJS

Python

Javascript

HTML

CSS

Code Factory

Internship

July 2013 - August 2013

During high-school, I participated to an internship organised by the company and the computer science teachers. The company was specialised in web games, and I worked on a mock sports betting application. I used MySQL as a database, Apache Tomcat as a web server, Java and Spring Framework for the backend and Backbone for the frontend.

MySQL

Apache Tomcat

Spring Framework

Backbone

Java

Javascript

HTML

CSS

Code Factory

Internship

July 2013 - August 2013

MySQL

Apache Tomcat

Spring Framework

Backbone

Java

Javascript

HTML

CSS