Description

Senior fullstack engineer with 25+ years building software, 15+ as a freelance contractor in the Netherlands. Delivered production systems for clients across banking, retail, energy, government and airline — including BMG Bank, Nike EMEA, Alliander, KLM and Ministry of Infrastructure. The common thread: real client deadlines, real production code, environments where decisions have to hold up over time.

Primary stack: Java, Spring Boot, TypeScript, React. Strong on frontend design, REST/GraphQL APIs, and integration with legacy systems.

The past year I've focused on how AI-assisted software should be designed, governed, and verified. That means real engagements (an agentic business-plan generation pipeline for Startboard, integrating MCP servers and multi-agent n8n workflows), and an open-source agentic SDLC framework I built and maintain — ADW: I'm now the senior who can both ship production fullstack and reason about agent design, MCP integration, HITL gating, and where AI actually fits in an engineering team's workflow.

Available for new contracts in 2026. Senior fullstack work preferred, AI-leaning roles welcome. Based in the Netherlands, open to on-site, hybrid and remote engagements across NL and EU.

Industry field of expertise

Languages

German
Native or bilingual
Afrikaans
Conversational
English
Native or bilingual
Dutch
Fluent

Workplace preferences

Can work on-site

Amsterdam (up to 50km)

Freelance
Java lead developer, Front end developer
July 2010 - Today (16 years)
Independent senior full-stack developer (Java backend, JS/TS frontend) delivering production systems for banking, retail, energy, government and airline clients. Engagements at BMG Bank/ING, Nike EMEA, Alliander, Ministry of Infrastructure and KLM. The past year focused on agentic AI, LLM tooling and an open-source agentic SDLC framework (ADW).
Java Typescript React.js Spring boot LLM
Hinttech
Senior Java/J2EE Developer
August 2004 - June 2010 (5 years and 10 months)
Delft, Netherlands
Senior Java/J2EE developer detached to clients Nuon (energy-saving website, customer-facing portals, agent tools, security system) and PCM (Tridion-based news portals). Java/EJB, Spring, Hibernate, Tridion, integration with mainframe and SOAP backoffices.
Java Oracle SQL
Getronics PinkRoccade
Java/J2EE Developer
January 1999 - July 2004 (5 years and 6 months)
Amersfoort, Netherlands
Java/J2EE developer on enterprise projects: AEGON Offertenet (online pension quote engine producing legally binding contracts within minutes — a Dutch first), AEGON Financial Open (intermediary portfolio system, MQ-Series link to mainframe), Achmea Ebackoffice (pensions web layer), ING ALM Redesign (Asset/Liability test automation), and CEDAR PRO clipping rights administration.
Java