Felix Kaiser
RLHF Subject Matter Expert - German Language & LLM Safety (Contract)
Oakland, California, United States
Summary
🤩
Rockstar🎓
Top SchoolFelix Kaiser is a bilingual customer experience professional and writer with 11 years of cross-disciplinary experience blending UX-minded communication, game design, and software engineering. Based in Oakland, he pairs German–English linguistic expertise with hands-on contributions to notable open-source projects—improving TypeScript typings and tests for GoogleChromeLabs/comlink and modernizing core modules in sequelize—demonstrating strong full‑stack fluency. He crafts empathetic, user-centered content for product and support teams, having driven multilingual support, onboarding, and compliance workflows at companies like Twitch, Anthropic, and Eko Health. As a freelance translator and SME for RLHF/SFT annotation, he applies rigorous bilingual judgment to model safety and content alignment for enterprise AI. Comfortable in fast-paced, cross-functional environments, Felix also brings a game designer’s perspective to product decisions and community engagement. Outside work he channels creativity into game development, fantasy writing, illustration, and running tabletop campaigns—activities that inform his storytelling and user-first writing approach.
11 years of coding experience
4 years of employment as a software developer
Certificate in 3D Modeling and Animation, Certificate in 3D Modeling and Animation at SAE InstituteBachelor of Arts - BA, Applied Media Studies & Computer Science, Bachelor of Arts - BA, Applied Media Studies & Computer Science at University of Bayreuth
German, English
Stackoverflow
2,299reputation
821kreached
37answers
10questions
tdd
top-5%
angular-ui-router
top-5%
visual-studio-code
top-5%
Github Skills (61)
unit-testing10
debugging10
sequel10
json10
debug10
javascript10
maintenance10
sinon10
testing10
css10
autocomplete10
typescript10
s610
language-server-protocol10
vscode-extension10
Programming languages (22)
Github contributions (5)
xdebug/vscode-php-debug
Dec 2015 - Jan 2022
PHP Debug Adapter for Visual Studio Code 🐞⛔
Role in this project:
Back-end Developer
Back-end DeveloperContributions:34 releases, 5 reviews, 376 commits in 6 years 2 months
Contributions summary:Felix primarily worked on improving the PHP debug adapter for Visual Studio Code. They refactored the code to ditch XML2js and use xmldom for XML parsing. The contributions include implementing exception breakpoints, supporting function breakpoints, and adding the functionality for setting and setting variables. These changes aimed to improve debugging capabilities, and fixing bug.
visual-studio-codevscodephpvscode-extensionxdebug
felixfbecker/php-language-server
Oct 2016 - Dec 2018
PHP Implementation of the VS Code Language Server Protocol 🆚↔🖥
Role in this project:Backend Developer
Backend DeveloperContributions:31 releases, 1 review, 97 commits in 2 years 2 months
Contributions summary:Felix primarily focused on improving the core functionality and stability of the PHP Language Server. Their contributions include refactoring code, renaming variables, fixing docblock issues, and improving completion suggestions. They also removed formatting support and optimized the Docker build process. These changes aimed to enhance performance and address several existing issues within the project.
symbolsvscodephpvscode-extensionvs-code
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.