Matthieu Le Brazidec
Staff Engineer at Cryptio
Paris, Ile-de-France
Summary
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RockstarMatthieu Le Brazidec is a Lead Software Engineer based in Paris with 11 years of experience building resilient back-end systems, primarily in Rust. He has progressed through roles at companies such as Deliveroo, Kraken, and Cryptio, where he moved from senior engineer to lead, shaping production-grade services for high-throughput and security-conscious domains. Matthieu is an active open-source contributor—his foundational work on the bastion runtime and enhancements to the rust-web3 Ethereum client show a focus on fault-tolerant distributed systems and blockchain RPC reliability. Colleagues know him for pragmatic refactors (e.g., supervisor restructuring) and careful type/data-model improvements that prevent class-wide bugs in financial and crypto integrations. He blends hands-on system design with mentorship and a track record of shipping robust, production-facing Rust code.
11 years of coding experience
8 years of employment as a software developer
Github Skills (14)
asynchronous10
json-rpc10
fault-tolerance10
distributed-systems10
rust10
ethereum10
blockchain10
concurrency10
async10
actor-model10
serde9
web3js9
api8
apidoc8
Programming languages (15)
Github contributions (5)
bastion-rs/bastion
Oct 2019 - Jan 2020
Highly-available Distributed Fault-tolerant Runtime
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 153 commits, 50 PRs in 2 months
Contributions summary:Matthieu's initial commit sets up the foundation for the "bastion" runtime, including core modules and basic functionality. Subsequent commits added the skeleton for the system and supervisor structs and implemented fault recovery for the system and basic message passing for it and the supervisors. The user's contributions included restructuring the supervisor to use vectors instead of trees and implementing the initial registry functionality and message passing capabilities.
fault-tolerantfault-tolerancerustrust-languagesupervision
tomusdrw/rust-web3
Sep 2019 - Oct 2019
Ethereum JSON-RPC multi-transport client. Rust implementation of web3 library. ENS address: rust-web3.eth
Role in this project:Back-end Developer
Back-end DeveloperContributions:6 commits, 6 PRs, 7 comments in 1 month
Contributions summary:Matthieu primarily focused on enhancing the `rust-web3` library, particularly in the context of Ethereum JSON-RPC interactions. They made significant changes to the codebase, updating data types like block numbers from U256 to U64, and exporting necessary types. They also addressed issues related to the `trace` module, correcting API calls and adding missing fields to the `BlockTrace` type. Their contributions suggest a focus on improving the library's functionality and data representation for Ethereum blockchain interactions.
ethereumjson-rpcrust
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