Nick Fitzgerald
Senior Principal Software Engineer at F5
Portland, Oregon, United States
Summary
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RockstarNick Fitzgerald is a Senior Principal Software Engineer based in Portland with 16 years of experience building and hardening low-level systems, tooling, and WebAssembly infrastructure. He has driven backend and performance work at companies like Fastly and Mozilla and now F5, combining compiler- and runtime-level optimizations with practical engineering for production services. An active open-source contributor, Nick has shaped projects across the Wasm ecosystem—wasm-pack, wasm-bindgen, wasmtime, wasm-tools—and contributed to high-profile engines like Servo and Cranelift. He brings deep expertise in test automation and QA, consistently improving test suites and documentation to make complex systems more maintainable and correct. Colleagues rely on him for pragmatic refactors, performance tuning, and shipping reliable developer tooling that bridges Rust, Wasm, and native runtimes. Outside of visible product features, he often focuses on the behind-the-scenes infrastructure (parsers, IRs, and allocators) that makes higher-level innovation possible.
16 years of coding experience
12 years of employment as a software developer
Github Skills (83)
parser10
cargo10
servo10
python10
testing10
command-line-interface10
webpages10
rust-wasm10
web-content10
base64-encoding10
coreutils10
code-generation10
command-line-tool10
elf10
markdown10
Programming languages (26)
Github contributions (5)
rustwasm/twiggy
Feb 2018 - Apr 2021
Twiggy🌱 is a code size profiler
Role in this project:
Back-end Developer
Back-end DeveloperContributions:181 commits, 116 PRs, 316 pushes in 3 years 3 months
Contributions summary:Nick implemented core infrastructure and filled out the skeleton of the project, specifically focusing on traits and core structures. The user made changes to the `traits` and `svelte_ir` modules, indicating a focus on the internal representation and core logic of the code size profiler. The commits demonstrate work on essential aspects of the project, like creating the initial implementation of the `top` functionality. The user also contributed towards the WASM parsing.
code-sizesize-optimizationtwiggywasm
fitzgen/bumpalo
Nov 2018 - Jan 2023
A fast bump allocation arena for Rust
Role in this project:Back-end Developer
Back-end DeveloperContributions:138 reviews, 207 commits, 149 PRs in 4 years 2 months
Contributions summary:Nick primarily focused on refactoring and improving the `bumpalo` library. Their contributions involved removing deprecated features such as `BumpSet` and improving memory management and allocation. The user also added features like `into_bump_str` and `into_bump_slice` and made the `realloc` method more performant. They implemented the `Allocator` trait for `Bump`, enabling the use of `Bump` with `std` collections and added tests to ensure correct behavior.
rustallocationarena
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