Yagiz Nizipli
Summary
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RockstarYagiz Nizipli is a principal systems engineer with 11 years of experience based in Jersey City, specializing in high-performance backend and runtime systems. He drives performance improvements across major open-source projects—Next.js, undici, Node.js, Fastify and Sentry—often by reducing syscalls, streamlining serialization, and simplifying hot paths. Yagiz uniquely bridges C++ and JavaScript domains, contributing to the ada WHATWG URL parser and Cloudflare's workerd to bring fast, standards-compliant parsing and Node.js compatibility to systems used by Cloudflare, Telegram and ClickHouse. As a Node.js Technical Steering Committee member and active Cloudflare engineer, he pairs pragmatic refactors with deep runtime expertise to deliver measurable throughput and resource gains in production. Colleagues describe his work as surgical: small low-level changes like replacing fs calls or using string_view that produce outsized performance wins.
11 years of coding experience
Stackoverflow
1,033reputation
158kreached
26answers
71questions
Github Skills (90)
parser10
node-js10
postgresql10
clientside10
testing10
file-systems10
http10
bots10
next-js10
url-parsing10
file-operations10
astro-js10
botkit10
linter10
prisma210
Programming languages (27)
Github contributions (5)
ada-url/ada
Dec 2022 - Mar 2023
WHATWG-compliant and fast URL parser written in modern C++, part of Node.js, Clickhouse, Redpanda, Kong, Telegram and Cloudflare Workers.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:3 releases, 708 reviews, 480 commits in 3 months
Contributions summary:Yagiz primarily worked on implementing the URL parser for the C++ library "ada". Their contributions include adding the initial parser, refactoring it, and adding functionalities like scheme start state, scheme state, and authority state. The user also made improvements to error handling and performance by using `string_view` and other optimizations. The focus of their work centered on building the core parsing logic and features of the URL parser library.
cppurl-parsercompliantspec-compliantspec
cloudflare/workerd
Oct 2023 - Apr 2025
The JavaScript / Wasm runtime that powers Cloudflare Workers
Role in this project:Back-end Developer
Back-end DeveloperContributions:788 reviews, 357 PRs, 773 pushes in 1 year 6 months
Contributions summary:Yagiz contributed to the `cloudflare/workerd` repository by implementing and adding tests for the `path` and `zlib` modules, which are part of the Node.js compatibility layer. Their work involved adding placeholder functions and integrating Node.js test cases to ensure proper functionality. The user also addressed timeout issues and corrected error messages related to zlib, further enhancing the runtime's compatibility and stability.
cloudflarejavascriptpowersruntimeservice-worker
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