Paul Klein
Founder at Hawk Hill Ventures
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolPaul Klein is a founder and builder based in San Francisco with 11 years of experience launching developer-first products and teams across startups and scale-ups. He co-founded Stream Club (acquired by Mux), led identity and login efforts at Twilio, and most recently founded Browserbase to explore browser-based AI tooling. Paul combines hands-on full-stack engineering—evidenced by contributions to the browserbase/stagehand AI web-browsing framework—with product and GTM leadership as former Director of Self-Service at Mux. He also scouts early-stage developer tools as an angel investor at Hawk Hill Ventures for a16z, signaling a strong nose for platform opportunities. Comfortable shipping both infrastructure and user-facing features, he has a track record of turning prototypes into acquisition-ready products. He prefers contact via Twitter and often surfaces practical demos (like a Wordle example) to illustrate technical ideas.
11 years of coding experience
7 years of employment as a software developer
Bachelor of Science Computer Science, Bachelor of Science Computer Science at San Francisco State University
Github Skills (13)
lm10
playwright10
agent10
ai10
llm10
typescript-types9
typescript9
javascript9
typescripts9
selenium-ide8
testing8
selenium8
python4
Programming languages (12)
Github contributions (5)
browserbase/stagehand
Oct 2024 - Mar 2025
An AI web browsing framework focused on simplicity and extensibility.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:3 releases, 19 reviews, 21 PRs in 5 months
Contributions summary:Paul primarily contributed to the implementation and testing of features within the AI web browsing framework. Their work involved adding evaluation functionalities by creating and modifying evaluation scripts. The user also made changes to the core library, updating the Stagehand class and adding functionality. Furthermore, the user worked on adapting the Wordle example, demonstrating an understanding of the framework's application.
agentsaillmsplaywrightpuppeteer
EEdge/FoodCraft
Oct 2015 - Dec 2015
A simple Android app that fetches meal recipes based on ingredients entered by the user.
Contributions:61 commits in 2 months
recipesrecipeingredientsandroidandroid-app
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