Chris Branch
Systems Engineer at Cloudflare, Inc.
London, England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolChris Branch is a systems engineer based in London with 12 years of experience building and optimizing distributed systems from global scale down to microarchitecture-level improvements. Comfortable writing "safely and fearlessly" in Rust and using Go where appropriate, he brings deep systems programming expertise honed at Cloudflare and earlier C++ work on search and database engines at Qlik. His open-source contributions include security- and performance-focused improvements to Cloudflare's userspace WireGuard implementation (boringtun), demonstrating practical cryptography and async I/O refinements. Known for pragmatic refactors—memory safety migrations, epoll handling and peer-index hardening—he blends low-level rigor with production-grade engineering.
12 years of coding experience
8 years of employment as a software developer
Ilford County High SchoolBachelor of Science (BSc), Computer Science, Bachelor of Science (BSc), Computer Science at University of Bristol
English
Github Skills (6)
rust10
cryptography10
wireguard10
epoll9
system-programming9
cloudflare8
Programming languages (8)
Github contributions (5)
cloudflare/boringtun
May 2019 - Aug 2022
Userspace WireGuard® Implementation in Rust
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2 reviews, 5 commits, 4 PRs in 3 years 3 months
Contributions summary:Chris primarily focused on improving the underlying implementation of the `boringtun` project, a userspace WireGuard implementation. Their contributions included migrating to `MaybeUninit` for improved memory management, upgrading the `ring` cryptography library, and refactoring code related to epoll event handling. They also implemented features to allow controlling write event notifications and modified the peer index handling for security considerations.
userspacecloudflarerustvpnwireguard
cloudflare/shellflip
Apr 2023 - Mar 2025
Graceful process restarts in Rust
Contributions:4 releases, 9 reviews, 12 PRs in 1 year 11 months
graceful-shutdownrustserversystemd
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