Sebastian Sebald
Softwarearchitekt at Reservix GmbH
Freiburg im Breisgau, Baden-Württemberg, Germany
Summary
🤩
Rockstar🎓
Top SchoolSebastian Sebald is a software architect based in Freiburg with 12 years of experience building pragmatic, user-focused systems and bridging the gap between design vision and engineering reality. As a long-term architect at Reservix he combines product thinking with hands-on implementation, having earlier co-founded a software company and worked as a developer at PTW. He has deep front-end and TypeScript expertise and is an active open-source contributor to high-profile projects like Material-UI and DefinitelyTyped, where he improved typings and tests to boost developer experience and type safety. Colleagues rely on him to translate ambiguous design goals into robust, well-typed code and maintainable architecture. He brings an entrepreneurial mindset to larger product teams, pairing startup grit with enterprise delivery experience. An often-overlooked strength is his focus on developer ergonomics—clean typings and tests that prevent future friction.
12 years of coding experience
6 years of employment as a software developer
Albert-Ludwigs-Universität Freiburg
Stackoverflow
16,568reputation
1.4mreached
134answers
29questions
observable
top-5%
react-router
top-1%
rxjs
top-5%
keyboard-shortcuts
top-1%
typescript
top-1%
javascript
top-1%
Github Skills (30)
visual-studio-code10
javascript10
react-components10
keyboard-shortcuts10
typescript10
material-ui10
system-design10
type-definition10
react-component10
system10
typescript-types10
typescripts10
react-router10
react10
typescript-definitions9
Programming languages (7)
Github contributions (5)
mui/material-ui
Jul 2017 - Mar 2018
Material UI: Comprehensive React component library that implements Google's Material Design. Free forever.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:29 commits, 59 PRs, 44 pushes in 7 months
Contributions summary:Sebastian primarily contributed to improving the TypeScript typings for the Material-UI library. Their work included adding and refining type definitions for various components, such as AppBar, Card, and Button. They addressed issues related to component props, event handlers, and overall type coverage, ensuring the library's type safety and developer experience. Furthermore, they added tests for these typings and refactored them to modules.
reactmuimaterialjavascriptmaterial-design
DefinitelyTyped/DefinitelyTyped
Jan 2017 - Aug 2019
The repository for high quality TypeScript type definitions.
Role in this project:Front-end Developer
Front-end DeveloperContributions:9 commits, 11 PRs, 16 comments in 2 years 7 months
Contributions summary:Sebastian contributed significantly to the TypeScript type definitions within the DefinitelyTyped repository. Their commits focused on adding and updating type definitions for various libraries, including slonik and @styled-system/css. They demonstrated expertise in writing and maintaining accurate type definitions, essential for ensuring type safety and developer productivity in TypeScript projects. The contributions also involved fixing linting issues within the code.
typescript-definitionstype-definitionshigh-qualitydtsdefinitions
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.