Hauke Tönjes
Teamleiter Softwareentwicklung - Digital Business at GRIMME
Osnabrück, Lower Saxony, Germany
Summary
🤩
Rockstar🎓
Top SchoolHauke Tönjes is a software engineering leader with nine years of hands-on experience, currently heading the Digital Business development team at GRIMME. He moved up from building cross-platform apps in Flutter to team leadership, combining practical mobile and front-end skills with delivery ownership. His open-source contributions include front-end work on the covidpass project—adding features like dark mode, responsive UI, TypeScript migration and a device camera QR scanner—showing a pragmatic focus on accessibility and UX. Academically advancing with an MSc in Informatics while holding a BSc in Applied Computer Science, he blends formal study with applied product delivery. Colleagues describe him as a pragmatic implementer who still enjoys shipping UI details that make apps feel polished.
9 years of coding experience
4 years of employment as a software developer
Bachelor of Science - BS Angewandte Informatik, Bachelor of Science - BS Angewandte Informatik at Hochschule HannoverAbitur, Abitur at Kolleg St. Thomas der DominikanerMaster of Science - MS Informatik, Master of Science - MS Informatik at IU International University of Applied Sciences
Github Skills (10)
typescript10
nextjs10
typescripts10
react10
typescript-types10
qr-code9
javascript9
ui-design8
certificate6
wallet5
Programming languages (7)
Github contributions (5)
covidpass-org/covidpass
Jun 2021 - Apr 2022
Web app for adding EU Digital COVID Certificates to your wallet apps
Role in this project:
Front-end Developer
Front-end DeveloperContributions:1 release, 2 reviews, 25 commits in 9 months
Contributions summary:Hauke primarily focused on front-end development for the CovidPass web application. Their contributions involved implementing new UI features, including dark mode, responsive design for different screen sizes, and integrating navigation elements. The user also worked on the integration of a QR code scanner using the device camera. They also transitioned the project to TypeScript and implemented a color selector using a radio menu from Headless UI.
certificatespasscertificatewallet
hauketoenjes/responsive_grid_list
Feb 2021 - Jan 2023
A Flutter plugin to create responsive grid lists using ListView.builder() or SliverList with a SliverChildBuilderDelegate
Contributions:7 releases, 1 review, 26 commits in 1 year 11 months
widgetlayoutdartsliverlistbuilder
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