Jonas Schiefner
Software Engineer at Swiss Life Select
Lisbon, Portugal
Summary
👤
Senior🎓
Top SchoolJonas Schiefner is a software engineer based in Lisbon with eight years of experience building and modernizing web and mobile applications. With an M.Sc. in Computer Science from the University of Münster, he has practical experience across Ruby on Rails, Vue.js and Flutter/Dart, and currently focuses on syncing internal systems, partner integrations and cloud migrations at Swiss Life Select. He has a track record of improving developer experience by enhancing internal tools and incrementally updating legacy codebases. Previously at Zweitag he shipped a long-lived internal link shortener and mentored junior teammates while balancing full‑stack and app development. Curious by nature, he combines academic rigor with hands‑on problem solving and a habit of learning new technologies to tackle complex integration challenges.
8 years of coding experience
5 years of employment as a software developer
Master of Science - MS, Computer Science, 1.6, Master of Science - MS, Computer Science, 1.6 at University of MünsterMaster of Science - MS, Computer Science, Master of Science - MS, Computer Science at Universidad de Valladolid
English, French, Spanish, German, Portuguese
Github Skills (68)
python10
apple-tv10
brightness10
statistics10
tweak10
altstore10
theos10
jailbreak10
backport10
scikit9
control-center9
machine-learning9
scikit-learn9
data-science9
data-analysis9
Programming languages (9)
Github contributions (5)
jschiefner/advanced-brightness-slider-tweak
Aug 2021 - Dec 2022
iOS Tweak that manipulates the brightness slider in the control center so the display brightness and the white point intensity can be modified
Contributions:7 releases, 117 commits, 1 PR in 1 year 4 months
displaytweakcentertheosbrightness-slider
jschiefner/shopping-list-ios
May 2021 - Feb 2022
Contributions:38 commits, 4 pushes in 9 months
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