Selected work
Overseer
Featured · 2026An orchestration system for AI coding agents. It turns a feature request into small tasks and takes each one from prompt to reviewed, merged code. In 19 days it ran 4,017 agent sessions and landed 916 tasks.
- —One planner splits the work into small tasks and runs each with Claude, Codex or OpenCode, in its own copy of the code.
- —A second model reviews every change, and each one is checked against what "done" means for its task before it merges.
- —A parity check measures each page against its design at every screen width and in every language before it can merge.
- —Its React UI has the task board, chat, review and a live pixel-art “office” of the agents at work.
Client work · Purmerend · 2026
Driving school website
I designed and built this static, mobile-first Dutch site. It's hosted on Vercel, and the owner edits content through Nuxt Studio.
Nuxt 3Nuxt ContentTailwindTypeScript
Visit live site ↗Side projects
Experience
Apr 2023 — Present
Senior Frontend Developer · AFS Group
Shipped cap table, company onboarding, share-class and investor-invite features for an AFM-supervised trading platform that 20+ internal staff use daily to run shareholder registers and onboard investors, across 550+ feature commits.
- —Built the team's AI coding workflow and orchestrator, writing 23 of its 26 agent skills, and used parallel agents to close 2.5x more issues per sprint at the same average issue size.
- —Worked test-first on a codebase with 12,000+ Vitest tests and 460+ Playwright E2E tests, starting every bug fix with a failing regression test to prevent repeat defects; leading the rebuild of the E2E suite around 67 user journeys.
Sep 2021 — Mar 2023
Frontend Developer · Bitvavo ↗
Built frontend features in React and JavaScript for the web trading app and public website of the Netherlands' largest crypto exchange, with about 1 million customers and around 40% of the Dutch market.
- —Built the deposit and withdrawal flows (SEPA and payment-service-provider integrations), price charts and KYC onboarding in the exchange's web app, plus pages for the public website bitvavo.com.
- —Introduced Storybook as the frontend component library so components were reusable and documented, and wrote unit and component tests with Jest and React Testing Library to keep the UI reliable.
Dec 2020 — Sep 2021
Frontend Engineer · gracious
Built custom web apps, a webshop and Storyblok CMS sites for agency clients, in TypeScript, Vue.js and React.
Oct 2018 — Nov 2020
Software Developer · WebAds
Maintained and built new modules for the custom ad-tagging library used on about 50 publisher sites, serving millions of ad impressions.
- —Introduced React and Node.js to the frontend stack.
About
Senior Frontend Developer with 8 years of experience building production web apps in Vue.js, React, TypeScript and GraphQL, including the web trading app of the Netherlands' largest crypto exchange (about 1 million customers) and an AFM-supervised trading platform.
Works test-first (TDD) and runs parallel AI coding agents gated on tests and review, closing 2.5x more issues per sprint at the same average size. Looking for a senior frontend role at a product company. Fluent in Dutch and English.
