Work Experience

Modularized a monolithic Spring Boot backend into a Spring Modulith architecture, turning a tangled codebase into maintainable bounded contexts

Optimized critical JobRunr background jobs that restore installation states after traffic bursts, reducing recovery time from 30+ minutes to under 1 minute

Adopted key principles from Shape Up into our team process, splitting into 4 focused tracks. Shipping cadence improved from every few months to every 2 weeks

Established comprehensive testing culture: TDD practices, backend integration tests, Playwright E2E tests, and visual regression testing

Architected a scalable event processing design based on Redis MemoryDB and Vert.x to resolve ongoing customer-facing scalability challenges

Scaled the team from a small group to 9 engineers while maintaining velocity through structured onboarding and knowledge sharing

Prevented a planned 4-month gem rewrite by transferring deep technical knowledge to the new team, reducing delivery time to 1 day

Delivered a technical training program covering architecture, domain knowledge, and engineering practices to supercharge the new team's ramp-up

Resolved foundational organisational blockers that had prevented the team from upgrading their tooling, unblocking faster delivery and security updates

Supported the architect in creating architectural designs for the platform's next phase

Built the entire Connect Evac platform from scratch: Flutter app, backend API, and alarm routing. Achieved NEN 2575-4 certification on the first attempt

Engineered a performance-critical full-stack architecture delivering fire alerts to care workers within seconds, including acknowledgment verification and Twilio voice call fallback

Designed a resilient Android foreground service with a ping-pong keep-alive mechanism between Dart isolates, plus Firebase push notification fallback, ensuring alarms always get through

Architected Connect Evac as a modular system within the existing backend, cleanly separated with its own API while reusing shared infrastructure like panel communication

Delivered zero-downtime rolling deployments and Multi-AZ infrastructure, hard requirements for fire safety certification

Maintained 6 applications, 10+ custom gems, and multiple microservices across a polyglot stack to the highest quality standards through TDD and continuous delivery

Designed and delivered a role-based permissions system with a custom DSL in 2 sprints, enabling non-technical users to self-configure access rules per department instead of requiring developer changes each sprint

Drove Agile Scrum adoption before ASML's wider transformation, serving as both tech lead and scrum master, significantly improving team collaboration and velocity

Modernized legacy applications into updated frameworks while maintaining stability across all production systems

Set up all Jenkinsfiles and CI/CD pipelines across the application suite, and built custom tooling on RHEL Linux

Helped build a generic scalable onboarding system for the Hue mobile app that dynamically generates UI flows per accessory type, replacing the need to hand-build flows for hundreds of "Friends of Hue" accessories

Built and maintained the Hue Labs platform with a custom DSL that enabled marketing teams to create scenes and automations without developer involvement, dramatically accelerating content delivery

Worked across the full stack: React frontend, Elixir Phoenix backend, and the JavaScript core of the custom DSL

Contributed to a high-performance team with zero tolerance for technical debt, dedicated experimentation time, and a culture of continuous improvement

Delivered all planned work within budget plus additional improvements, including reduced technical debt and added test coverage for the team inheriting the codebase

Built helpdesk attachment support, planning change notifications, and contract-based push messaging for tens of thousands of flex workers

Implemented automated blocking of inactive users and TopDesk helpdesk integration with periodic sync for support requests

Improved code quality by adding unit tests, refactoring legacy code, and cleaning up the Django/Vue.js codebase for long-term maintainability

Led the backend guild of 20+ engineers as Guild Leader, driving knowledge sharing, technical standards, and proficiency development across Java, Ruby, and Python

Created internal learning journeys and proficiency scales for three backend stacks, using them to assess engineers and guide their growth to the next level

Conducted regular tech check-ins across nearly all client projects, gathering feedback on tools and techniques to continuously evolve Kabisa's technical standards

Provided architectural guidance and mentoring across projects, helping teams choose the right technologies and approach for their specific challenges

Deployed as Lead Developer to major clients including ASML and Hertek Safety, delivering high-impact solutions in mission-critical high-tech domains: semiconductor tooling and fire safety

Grew from junior engineer to leading senior developers within 4 years, recognized for technical skill and leadership capabilities regardless of years of experience

Learned high-performance team practices at early assignments and brought those principles to every subsequent team, consistently raising the bar for quality and collaboration

Championed TDD, continuous delivery, and automation as core engineering practices, demonstrating that higher quality standards lead to faster delivery with fewer defects

Worked across Java, Python, Ruby, and Elixir projects, building full-stack expertise that would later form the foundation for the Guild Leader role

Built the complete system end-to-end: custom ERC20 cryptocurrency, Solidity escrow smart contracts, Node.js/Express backend, and a Vue.js storefront with Web3 wallet integration

Published a technical article on building ERC20 escrow contracts that documented the architecture and approach

Published research demonstrating that TDD significantly improves both safety and development speed in smart contract engineering, where deployed bugs are immutable and costly

Showcased the project at two industry events including nlOUG (Dutch Oracle User Group), demonstrating live blockchain transactions with real beer as the reward

Applied TDD to smart contract development, dramatically increasing the feedback loop and code reliability in a domain where bugs are irreversible

Graduated Cum Laude with an outstanding score for both the technical implementation and presentation

Delivered new features and games for the platform as part of a professional Agile Scrum team, building both API endpoints and frontend components

Built internal tooling to accelerate testing of new features and refactors, reducing the feedback loop for the development team

Learned the fundamentals of professional software development: refactoring, architectural thinking, and working effectively within a Scrum team

Designed and built a Selenium + xUnit test automation framework from scratch, featuring Page Object Model, a Fluent API, and smart wait strategies

Applied software engineering best practices to test code, making the framework elegant and maintainable for the team to adopt and extend

Delivered an internal training to onboard the team on the framework, helping shape Scorito's early testing culture

Learned that architectural patterns outlast tools: the Page Object Model pattern used here remains a best practice in modern tools like Playwright today