Jacob Groß
Staff Performance Engineer at Framer
Munich, Bavaria, Germany
Summary
🤩
Rockstar🎓
Top SchoolJacob Groß is a Staff Performance Engineer based in Munich with 15 years of hands-on experience optimizing front-end performance, UX, accessibility, and security. He has driven measurable wins at Framer—improving Core Web Vitals and React hydration performance dramatically—and helped shape open tooling like Rolldown’s chunking API. A pragmatic engineer and early AI adopter, he introduced llms.txt support for Framer sites and planted internal AI/agent best practices. His open-source contributions span front-end libraries and validation tooling, where he’s fixed tricky regex parsing and hardened IP/IPv6 validation logic. He also has a strong track record migrating and decomposing legacy monoliths into performant micro-frontends and leading security hardening efforts. Curious and detail-oriented, Jacob mixes product-focused impact with low-level engineering finesse.
14 years of coding experience
9 years of employment as a software developer
Bachelor of Science - BS Medieninformatik, Bachelor of Science - BS Medieninformatik at Ludwig-Maximilians-Universität MünchenProfessional Training to „Developer for Application Development”, Professional Training to „Developer for Application Development” at Berufsschule für Kommunikationselektronik München
German, English
Github Skills (16)
css10
regular-expression10
linting10
typescript10
javascript10
typescripts10
validation10
validations10
animation10
react10
typescript-types10
spring9
security9
motion-capture9
motion-detection9
Programming languages (22)
Github contributions (5)
fabian-hiller/valibot
Jul 2023 - Dec 2024
The modular and type safe schema library for validating structural data 🤖
Role in this project:
Back-end Developer
Back-end DeveloperContributions:20 reviews, 2 PRs, 38 comments in 1 year 4 months
Contributions summary:Jacob primarily focused on improving the code quality and maintainability of the project. Their contributions include adding and configuring linting rules and plugins for enhanced code style and security. Furthermore, they made several bug fixes and refactored code related to IP, IPv6, and other validation functionalities within the library, enhancing the overall robustness of the codebase. They also fixed typos in comments.
bundle-sizemodularparsingruntimetype-safe
motiondivision/motion
Feb 2024 - Jan 2025
A modern animation library for React and JavaScript
Role in this project:Front-end Developer
Front-end DeveloperContributions:10 reviews, 7 PRs, 21 pushes in 10 months
Contributions summary:Jacob primarily focused on refining and optimizing the codebase related to regular expressions, particularly within the context of a React-based animation library. They identified and fixed several issues related to regex patterns used for parsing CSS variables, colors, and other complex values. Their contributions ensured the accuracy and reliability of the library's core functionality, specifically in handling numerical and color-related string parsing.
reactanimationproduction-readyreactjsgesture
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