Lion Ralfs
Software Engineer at SumUp
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolLion Ralfs is a software engineer based in Berlin with 10 years of experience building user-facing web applications and front-end tooling. After a long stint in front-end development at webschuppen and product-focused roles at OTTO, he now contributes to payments infrastructure at SumUp. He brings hands-on expertise in JavaScript and CSS, demonstrated by contributions to the popular sweetalert library where he fixed styling, added features like multiline support, and improved browser compatibility. Comfortable working across product and technical teams, he blends pragmatic implementation skills with an eye for UX polish. His background in computer science from the University of Hamburg underpins a methodical approach to problem solving and maintainable code. Colleagues would describe him as a detail-oriented engineer who quietly improves developer experience and front-end robustness.
10 years of coding experience
7 years of employment as a software developer
Bachelor of Science - BS Computer Science, Bachelor of Science - BS Computer Science at University of HamburgAbitur, Abitur at Gymnasium Altona
Stackoverflow
65reputation
2kreached
4answers
0questions
Github Skills (12)
modal-windows10
css10
uid10
modal-dialog10
javascript10
alerts10
modals10
front-end-development10
ui-design9
html8
service-worker6
progressive-web-apps6
Programming languages (13)
Github contributions (5)
t4t5/sweetalert
Oct 2017 - Feb 2022
A beautiful replacement for JavaScript's "alert"
Role in this project:
Front-end Developer
Front-end DeveloperContributions:13 commits, 9 PRs, 3 pushes in 4 years 4 months
Contributions summary:Lion contributed to the sweetalert repository by addressing styling and implementation issues. Their commits focused on fixing styling problems with the success icon and integrating changes. They also merged upstream changes, incorporated new features like support for multiple CSS classes and newlines within text elements, and ensured compatibility with older browsers. The changes appear to primarily involve JavaScript and CSS modifications within the UI of the library.
alertdialogmodaljavascriptalerts
lionralfs/hvv
Jan 2018 - Jan 2022
Contributions:5 releases, 51 commits, 1 PR in 4 years 1 month
apinode-jshvvjs-wrappernodejs
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