A selection of relevant roles where I made an impact
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Security specialist on the Continuous Delivery Platform Team (CDP) at DUO. Ensuring security, reliability, and integrity of applications and platforms, and sharing knowledge as security ambassador.
Charpand
Development of this website.
Started as technical mentor for the student team, contributing to technical decisions from day one. The app was subsequently fully rewritten in React Native / Expo, where I hold technical responsibility. Available on Google Play Store and Apple App Store.
Providing support for Microsoft 365 adoption to multiple non-profit organizations.
DNS management and shared hosting support for startups, including WordPress setup and email configuration.
Ongoing exploration of tools, languages, and approaches — building on hands-on experience to stay current and informed.
Simplicate
Migration from an on-premise VPS setup — dozens of servers, each with its own configuration and no central management — to AWS with Shared Compute. The new cloud setup scales automatically with usage, without manual intervention. The impact on release velocity was significant: from one hotfix per day and one release every three weeks, to multiple releases per day when needed.
Automated the full build, test, and deployment workflow using GitHub Actions. Quality checks that previously took 30–40 minutes now run in a fraction of that time — with more checks than before. Releases changed from a manually supervised process taking several hours to an automated process of around 30 minutes requiring no active attention.
Rebuilt the native mobile application in TypeScript and React Native using Expo, replacing a legacy codebase. Established CI/CD pipelines and application architecture; frontend team handled UI/UX while I focused on functionality and technical implementation.
Migrated development environment from a remote VPS setup to local development due to slow SFTP synchronization. Leveraged Docker images from the AWS migration to enable faster onboarding. A new developer previously spent multiple days setting up their workstation — this has been reduced to a matter of minutes. Developers now work fully locally and independently, without reliance on shared servers or slow file synchronization.
Established comprehensive regression testing using Playwright, enabled by running the full application landscape locally. All critical user flows are covered by automated tests. On average, a bug is caught before reaching production every three weeks. The stack runs primarily locally via CLI commands, but is also prepared to run in GitHub Actions CI/CD.
Refactored legacy monolithic PHP/React/jQuery application into independent services. Modernized architecture to align with current standards, simplified developer onboarding, and enabled independent development and scaling of services.
Alongside architectural refactoring, I continued extending existing applications with new functionality and brought legacy code up to modern standards.
aXtion B.V.
Started as a junior developer with a background in desktop applications, growing into a full-stack web developer role over time. Over the years, I became the go-to contact for colleagues and clients facing complex problems — including issues with third-party software. Clients valued my overview and my ability to steer toward the solution they actually needed, rather than what they literally asked for. Beyond software development, I set up and managed servers (Linux and Windows) on multiple occasions, partly automated.
Design, development, and modernization of a questionnaire system for GGZ/JGZ organizations. Over the years, I drove several significant architectural improvements that substantially increased the maintainability and extensibility of the system.
Development of inspection software with desktop integration for occupational health inspections. A complex project involving close collaboration between multiple systems and external parties — I was a primary point of contact for both technical and process-related coordination.
Development and deployment of communication software for citizen-municipality interactions.
Technical design and development of Verzoemelstee, an application supporting ADL workflows.
Preparation and achievement of ISO 27001 certification.
Rewrite of existing web application for physiotherapy analysis and treatment registration into a desktop application.
Onboarding of new colleagues and training in automation and software usage.
Supportive and advisory role in customer support.
Coordination of chain partners for improved collaboration.