Fabien Lamaison
U.S. Director at Positive Finance
San Francisco, California, United States
Summary
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Rockstar🎓
Top SchoolFabien Lamaison is a product and strategy executive who builds platforms and teams from zero to scale, with a focus on sustainable finance, fintech, and customer engagement. Based in San Francisco, he founded Positive Finance and bunny.money to bring impact-driven savings and giving into the workplace and consumer habits, and his ventures include a B Corp and Techstars-backed startup. He combines early-stage founder instincts with enterprise product leadership gained at Odigo, Capgemini and Advantone, launching enterprise CCaaS and patient engagement platforms and driving U.S. market entry for international products. A hands-on engineer by training (MS in math and CS) and a contributor to Bitcoin ABC/Bitcoin Unlimited, he has deep backend experience in cryptography, consensus tooling and peer set optimizations. He currently leads U.S. operations for Plastic Odyssey Fund and serves on nonprofit boards, blending product, purpose, and policy to scale mission-driven initiatives. Colleagues describe him as a builder who pairs technical rigor with go-to-market clarity and an appetite for unconventional, high-impact projects.
7 years of coding experience
22 years of employment as a software developer
Master of Science - MS Engineering with a dual major in mathematics and computer science., Master of Science - MS Engineering with a dual major in mathematics and computer science. at ENIB
English, French
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (15)
secp256k110
bitcoin10
c-language10
bitcoins10
peer-connection10
cprogramming-language10
cryptography10
peer-to-peer10
testing10
blockchain9
functional-testing9
functional9
unit-test9
unit-testing9
chain7
Programming languages (9)
Github contributions (5)
Bitcoin-ABC/bitcoin-abc
Oct 2018 - Jan 2023
Bitcoin ABC develops node software and infrastructure for the eCash project. This a mirror of the official Bitcoin-ABC repository. Please see README.md
Role in this project:
Back-end Developer
Back-end DeveloperContributions:101 releases, 1666 commits, 5 PRs in 4 years 4 months
Contributions summary:Fabien primarily contributed to the avalanche protocol implementation, removing unnecessary code and optimizing the peer set management within the Bitcoin ABC repository. They implemented enhancements to the getavalancheinfo RPC and its associated metrics, improving the test framework with new functionalities. Furthermore, the user updated the code to utilize more efficient and maintainable coding practices by introducing new libraries and features.
infrastructureabcnodejsecashbitcoin
BitcoinUnlimited/BitcoinUnlimited
Nov 2018 - Mar 2020
Bitcoin Unlimited continues on gitlab see https://gitlab.com/bitcoinunlimited/BCHUnlimited
Role in this project:Back-end Developer
Back-end DeveloperContributions:9 commits in 1 year 3 months
Contributions summary:Fabien primarily contributes to the Bitcoin Unlimited codebase by implementing and refining core functionalities. Their work includes enhancing cryptographic aspects, such as adding algorithm identifiers to ECDSA signatures for improved security. They also address and resolve potential issues within the codebase by creating distinct libraries and ensuring proper handling of edge cases within multisets. Moreover, the user integrates changes to improve the validation and finalization process of blocks, optimizing performance and reliability of the system.
unlimitedgitlabbitcoinbitcoin-unlimited
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