Peter Willemsen
Co-Founder at CodeBuffet
Amsterdam, North Holland, Netherlands
Summary
👤
Senior🎓
Top SchoolPeter Willemsen is a versatile co-founder and software engineer with 12 years of hands-on experience building secure, full-stack systems across games, web, and distributed ledger technologies from Amsterdam. He co-founded multiple ventures (CodeBuffet, ISA Warden, Chunk Works, SKALY, ION Labs) where he led architecture, prototype development, and integrations of DLTs like IOTA to make tamper-resistant, user-controlled solutions. Equally comfortable in front-end and back-end roles, he has a track record shipping reliable infrastructure—examples include multiplayer/hacker-resistant systems and production-grade APIs. A practical security-minded developer, he contributed to the well-known ccxt open-source library by improving Waves.exchange support, OHLCV correctness, and multi-language integrations. Colleagues describe him as highly loyal, independent, and deadline-driven, consistently delivering pragmatic engineering rather than flashy concepts. He pairs entrepreneurial grit with a curiosity for “special” technical craft—preferring deep, distinctive expertise over one-size-fits-all approaches.
12 years of coding experience
9 years of employment as a software developer
ITILv3Daaf Geluk
Dutch, English
Stackoverflow
359reputation
14kreached
3answers
8questions
Github Skills (18)
javascript10
back-end-development10
trading10
exchange10
cryptocurrency10
api10
stock-data9
price-data9
python9
php9
market-prices9
bluez6
android-ndk6
deep-learning6
android6
Programming languages (27)
Github contributions (5)
ccxt/ccxt
Jan 2022 - Mar 2022
A JavaScript / TypeScript / Python / C# / PHP / Go cryptocurrency trading API with support for more than 100 bitcoin/altcoin exchanges
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 commits, 5 PRs, 10 comments in 1 month
Contributions summary:Peter primarily focused on enhancing the Waves.exchange integration within the CCXT library. Their contributions included adding market order support, correcting OHLCV data fetching, and implementing functionality for the Waves exchange. They also introduced new features and implemented changes in multiple files, including javascript, php, and python.
exchangepythonethereumbotexchanges
peterwilli/nixpkgs
Feb 2018 - Apr 2022
Nix Packages collection
Contributions:15 pushes, 6 branches in 4 years 2 months
nixosnix-packages
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