Brendan Dahl
Software Engineer at Google
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top School
Top expert inFull-stack JavaScript Development
Brendan Dahl is a seasoned software engineer with 14 years of experience building browser and tooling infrastructure, currently focused on WASM tooling at Google from his base in San Francisco. He led PDF.js from research prototype to production in Firefox, co-designed its public API used by major platforms, and managed a large open-source community of contributors. His background blends browser architecture, compiler work (LLVM/Emscripten/WASM), and full‑stack contributions—ranging from performance-critical C/C++ and JIT work to front-end service worker features. Brendan has a track record of modernizing long-lived codebases, removing technical debt, and shipping headless browser and runtime integrations across platforms. He’s comfortable mentoring and leading cross-organizational efforts, and his deep involvement in widely used projects like PDF.js and Emscripten highlights both practical impact and low-level systems expertise.
14 years of coding experience
17 years of employment as a software developer
Bachelor, Computer Engineering, Bachelor, Computer Engineering at Colorado State University
Stackoverflow
33reputation
1kreached
0answers
3questions
Github Skills (28)
javascript10
c-language10
intrinsics10
llvm10
pdfjs10
service-worker10
front-end-development10
webassembly10
cprogramming-language10
compiler-development9
back-end-development9
vectorization9
css9
html9
simd9
Programming languages (12)
Github contributions (5)
mozilla/pdf.js
Aug 2011 - Mar 2022
PDF Reader in JavaScript
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:7 releases, 149 reviews, 1326 commits in 10 years 8 months
Contributions summary:Brendan appears to have been involved in both front-end and back-end development tasks. Their contributions focus on implementing and improving core features in the PDF.js project, including adding support for page rotation, improving undefined checks, and normalizing rotation. They also worked on initial alpha transparency support, and handling changes from upstream.
pdfjavascriptpdf-readerpdf-generationreader
mdn/serviceworker-cookbook
Oct 2015 - Dec 2015
It's online. It's offline. It's a Service Worker!
Role in this project:Front-end Developer
Front-end DeveloperContributions:19 commits, 16 PRs, 9 pushes in 1 month
Contributions summary:Brendan primarily contributed to the front-end development of the ServiceWorker Cookbook. They added a message relay feature using service workers, modifying index.js, service-worker.js, and index.html to facilitate message passing between clients. They also refactored code to use an Immediately Invoked Function Expression (IIFE) and made improvements to mobile viewing by updating layout and CSS.
serviceworkerjavascriptservice-workerworkeroffline
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