Background
- Research: a PhD in software product management from Utrecht University (2017), on user stories. Before that, a master's in business informatics and a bachelor's in information science, also at Utrecht.
- Secfi: Head of Product from 2017 to 2021, while the company grew from 3 to 55 people.
- Glo Dollar: built the core product as CTO, then as co-CEO and CEO built the commercial model that became its main source of revenue (2021 to 2026).
- Own ventures: bootstrapped two consumer businesses to $2M in sales.
- Today: building Extra Headroom, and leading product and technology part-time for startups through garm.com.
Posts
- What a week of Claude Code costs at API prices, by plan · November 2, 2026
- How Extra Headroom cuts Claude Code tokens without cutting quality · November 1, 2026
- Extra Headroom in production: Input -34%, Output -33% across 183 Claude Code users · October 6, 2026
- How Headroom makes AI coding more sustainable · September 24, 2026
- How to present token savings percentages honestly · August 18, 2026
- Hit the Claude Code weekly limit by Wednesday? Here's what's eating it · July 6, 2026
- Sub-agents are why your Claude Code weekly limit vanished · July 2, 2026
- Codex now meters by tokens: why your ChatGPT plan drains faster · June 15, 2026