Bartek Iwańczuk
Engineering Manager at Deno
Warsaw, Masovian Voivodeship, Poland
Summary
🤩
Rockstar🎓
Top SchoolBartek Iwańczuk is an Engineering Manager at Deno with a decade of experience building and leading teams that ship fast, reliable runtime and web platform software. He rose from first employee and core runtime engineer to team leader and now manager, contributing deep systems work around V8 integration, module loaders, and the Deno event loop. Bartek pairs low-level Rust and systems expertise—evident in contributions to rusty_v8, swc and the Deno standard library—with front-end polish, having improved Vue Devtools and the deno.land site. He has hands-on DevOps experience maintaining official Deno Docker images and optimizing CI and deployment workflows. Known for pragmatic ownership, he balances shipping critical runtime features with UX-focused fixes and tooling improvements. Based in Warsaw, he brings a rare combo of compiler/runtime internals, full-stack development, and open-source leadership.
10 years of coding experience
8 years of employment as a software developer
Warsaw University of TechnologyBudapest University of Technology and Economics
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (43)
deno10
javascript10
docker10
swc10
vuex10
back-end-development10
apidoc10
dependency-analysis10
component-development10
v810
http10
typescript10
dockers10
httpd-server10
http-server10
Programming languages (15)
Github contributions (5)
denoland/deno
Aug 2018 - Jan 2023
A modern runtime for JavaScript and TypeScript.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2 releases, 7547 reviews, 1330 commits in 4 years 6 months
Contributions summary:Bartek primarily contributed to the core functionality of the Deno runtime, specifically focusing on the implementation and refinement of features related to ES module execution, handling of promise rejections, and the incorporation of Node.js compatibility. The commits demonstrate expertise in low-level system programming, including implementing and debugging complex mechanisms such as a custom module loader, runtime event loop, and dynamic module loading. They also introduced changes that affect the overall architecture, suggesting a deep understanding of the system.
rustjavascriptruntimedenotypescript
denoland/std
Nov 2019 - Jan 2023
The Deno Standard Library
Role in this project:Back-end Developer
Back-end DeveloperContributions:18 releases, 678 reviews, 273 commits in 3 years 2 months
Contributions summary:Bartek contributed to the Deno Standard Library, specifically focusing on implementing and improving HTTP server functionalities. Their contributions include setting content-length headers for responses, developing a simple file server with logging and error handling, and implementing chunked transfer encoding. The user also addressed file server crashes and implemented improvements to streaming HTTP responses.
deno-deploydeno-modulejavascriptstandard-librarydeno
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