Simon Bihel
Principal Software Engineer, Head Of Infrastructure at SpruceID
London, England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolSimon Bihel is a Principal Software Engineer and Head of Infrastructure based in London with a decade of experience building infrastructure, cryptographic identity systems, and production services—often implemented in Rust. As an early hire at SpruceID he has driven architecture, owned infrastructure and compliance (SOC2), and shipped identity projects like mobile driver's licenses and Sign-In with Ethereum implementations. He combines hands-on systems work (Kubernetes, Nomad, Cloudflare Workers, CI/CD) with language bindings and library development, and has led small engineering teams while remaining deeply technical. His open-source contributions include meaningful improvements to the widely used siwe (Sign-In with Ethereum) library, fixing grammar parsing and validation edge cases. Comfortable operating in both internal platform and customer environments, he blends standards expertise (W3C Verifiable Credentials, OID4VC, ISO mDL) with pragmatic delivery. Peers describe him as a rare infrastructure leader who still prefers to ship code and tests himself.
11 years of coding experience
4 years of employment as a software developer
Bachelor's degree (first two years) Computer Science, Bachelor's degree (first two years) Computer Science at Université de Caen NormandieBachelor's degree and Master's degree Computer Science, Bachelor's degree and Master's degree Computer Science at Université de Rennes IBachelor's degree and Master's degree Computer Science, Bachelor's degree and Master's degree Computer Science at École normale supérieure de Rennes
French, English
Stackoverflow
1reputation
0reached
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Github Skills (8)
regular-expression10
javascript10
ethereum10
jestjs9
jes9
jtest9
nodejs8
json7
Programming languages (19)
Github contributions (5)
spruceid/siwe
Oct 2021 - Sep 2022
Sign-In with Ethereum library
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 60 reviews, 19 commits in 11 months
Contributions summary:Simon significantly contributed to the `siwe` repository, focusing on enhancing the parsing and validation of Sign-In with Ethereum messages. They implemented a regex parser as an alternative to the ABNF parser, addressing grammar issues and adding comprehensive tests. The user also worked on improving message validation, including expiration date handling and address format validation, and refactored to incorporate an integer for the chain ID.
ethereumidentity
spruceid/r2d2-cryptoki
Feb 2023 - Sep 2025
r2d2 adaptor for cryptoki
Contributions:1 PR, 7 pushes, 2 branches in 2 years 7 months
cryptokipkcs11
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