Hi, I'm Rosco

I'm a software engineer and entrepreneur based in Amsterdam. I run Revoke.cash, which over two million people have used to keep their crypto wallets safe, and I maintain CashScript, the smart contract language for Bitcoin Cash.

I've been building in crypto since 2018. On this site I write about crypto, software and the occasional year in review.

Now

Updated Oct 2026

  • Growing Revoke.cash as a business. I've recently introduced paid tiers that add multichain monitoring and automated revoking for people who want more protection.
  • Maintaining CashScript together with Mathieu Geukens. This year I gave a workshop and joined the tech panel at BLISS in Ljubljana.
  • Outside of work I'm going to a personal trainer 3x per week, playing some board games, video games, and chess, and learning how to sail.
  • Trying to write my 2025 & 2026 year in review posts, which are (as usual) running late.

Writing

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Selected talks

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