Frontend and React Native developer in Haarlem.
I build apps and websites, and I make sure they actually get finished. Kaizen, my own app, runs on iPhone, Android, the web and Windows from one codebase and has more than 6,000 sign-ups. I graduated in July 2026, after almost two years of Vue and React Native work at DTT in Amsterdam.
Open to a frontend or React Native role in a small product team, in or around Haarlem and Amsterdam.
A Pomodoro timer with Focus Rooms, where you study next to other people without a camera.
I started building Kaizen in September 2025, based on something I kept seeing in the study community I run on Discord: people focus better when someone else is there. That community now has about 30,000 members. It came out on Google Play on 2 January 2026, on the web later that month, and on the App Store and the Microsoft Store in May.
More than 6,000 people have signed up so far, and together they have logged more than 24,800 hours of focus. The app averages 4.5 stars on the App Store and Google Play.Sign-ups and hours from Kaizen’s admin panel, 9 October 2026.
Hogeschool Inholland, Haarlem
Graduated in July 2026 at the age of 20, in four years.
to
Koi (Cajun Koi Academy)
The study community of YouTube creators Mike and Matty. I moderated it and coordinated its sub-teams, and later fixed and improved its website.
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DTT, Amsterdam
My third-year placement and my first frontend work in a professional team, on Vue web apps. DTT hired me afterwards.
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DTT, Amsterdam
Vue web apps, CMSes and a React Native app for clients, built from shared components and reviewed in a team.
to present
Kaizen
Built and shipped on my own: the app, the Supabase backend, subscriptions and releases in three stores and on the web.
Some of the projects I worked on at DTT (opens in a new tab) in Amsterdam, first as an intern and then as a frontend developer.
React Native app
A research app for young people, from Erasmus MC-Sophia.
Web app
A provider of remote GP care.
Web app
A trading platform for scrap metal.
Web app
An advice tool that helps contractors choose fire protection.
Web app
An anonymous online self-test about drug use, from the Trimbos-instituut.
Web app and CMS
A study platform for students.
Game platform and CMS
The national media literacy game for primary schools.
CMS
A wellbeing app for students, from Erasmus University Rotterdam.
CMS
A provider of virtual care and e-health apps.
CMS
A contractor for telecom networks.
CMS
A location-based game with virtual balloons.
Website
An app and web agency in Amsterdam.
Live weather for Zandvoort from a local weather station, with charts, history and a beach cam.
Vue, TypeScript · 2024 to present
A Discord bot for a study server, with Pomodoro timers, study-time tracking and leaderboards. Now retired, and in hindsight the first prototype of Kaizen.
C#, MySQL · 2023 to 2026
Hiring a frontend or React Native developer, or curious about Kaizen? Send me an email.
