Grégory Demay
Staff Software Engineer, Team Lead (DeFi) at DFINITY Foundation
Zurich, Zurich, Switzerland
Summary
🤩
Rockstar🎓
Top SchoolGrégory Demay is a Staff Software Engineer and Team Lead at DFINITY Foundation based in Zürich, combining a strong academic background in information security and cryptography (Dr. Sc. ETH Zurich) with hands-on engineering in blockchain and DeFi. He leads cross-chain and DeFi teams, focusing on secure, production-grade back-end systems for the Internet Computer and contributing to core node software and cryptographic key management. His work includes targeted maintenance and security-focused refactors in the high-profile dfinity/ic repository, demonstrating attention to cryptographic hygiene and RPC robustness. Prior to DFINITY he spent six years as a security engineer and researcher, bringing rigorous formal and applied security practices to distributed systems. Colleagues know him for translating deep cryptographic research into practical, auditable implementations that scale in real-world blockchain deployments.
3 years of coding experience
10 years of employment as a software developer
Engineer's degree - Telecom Bretagne Diploma Electrical Engineering, Engineer's degree - Telecom Bretagne Diploma Electrical Engineering at IMT AtlantiqueBaccalauréat S option Mathématiques, Baccalauréat S option Mathématiques at Lycée Saint-Martin de France (95, Pontoise)CPGE PC, CPGE PC at Lycée Hoche (78, Versailles)
English, German, French
Github Skills (8)
refactoring10
rust10
cryptography10
refactor10
security9
back-end-development9
protocol-buffers7
unit-testing7
Programming languages (3)
Github contributions (5)
dfinity/ic
Sep 2022 - Jan 2023
Internet Computer blockchain source: the client/replica software run by nodes
Role in this project:
Back-end Developer & Cryptography Engineer
Back-end Developer & Cryptography EngineerContributions:468 reviews, 134 commits, 166 PRs in 4 months
Contributions summary:Grégory primarily worked on removing unused code related to the `TempCryptoComponentGeneric::new_from_seed` method, indicating maintenance and code cleanup. They also merged updates related to removing unused methods in `SecretKeyStoreCspVault`, which suggests a focus on security and key management. The user also contributed to other changes like the modification in a test files that test for cryptographic properties. The user also updated the tarpc library and increased input size limits over the RPC connection and added test for it.
replicablockchainnodesdfinityinternet
dfinity/evm-rpc-canister
Nov 2023 - Mar 2025
Interact with EVM blockchains from the Internet Computer.
Contributions:3 releases, 202 reviews, 142 PRs in 1 year 4 months
alchemyarbitrumavalanchecloudflarecross-chain
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