Renard Wellnitz
Staff Software Engineer at Spotify
Stockholm, Sweden
Summary
👤
Senior🎓
Top SchoolRenard Wellnitz is a Staff Software Engineer based in Stockholm with over 14 years of hands-on experience building Android apps, embedded systems, and large-scale backend services. He has led Android teams at RedMart and Zalando and now drives engineering at Spotify, combining product-minded UX improvements with rigorous engineering practices like TDD and analytics-driven A/B testing. His work spans mobile payment integrations, NDK/C++ native modules, real-time media processing, and database optimizations—evidence of a rare full-stack mobile systems skillset. Renard has shipped multiple Play Store apps (including contributions to Zalando and Payleven) and maintains a public footprint on StackOverflow and GitHub demonstrating continual problem-solving. He’s known for improving app metrics (e.g., raising RedMart’s Play rating to 4.6 and achieving 99.99% crash-free users) and for mentoring teams through hiring, training, and architectural guidance. Curious and pragmatic, he thrives on projects that mix low-level engineering challenges with broad user impact.
14 years of coding experience
19 years of employment as a software developer
Diplom (FH), Wirtschaftsinformatik, Diplom (FH), Wirtschaftsinformatik at Fachhochschule der Wirtschaft; Paderborn
German, English
Stackoverflow
6,929reputation
574kreached
132answers
0questions
bitmap
top-5%
fullscreen
top-1%
java
top-5%
android
top-1%
dialog
top-5%
Github Skills (49)
ocr10
handwriting-recognition10
lstm10
android10
android-viewpager10
fullscreen10
dialog9
render9
after-effects9
animation9
java9
lottie9
bitmap9
tesseract9
android-library9
Programming languages (4)
Github contributions (5)
renard314/tess-two
Sep 2014 - Feb 2018
Contributions:69 commits, 36 pushes, 1 branch in 3 years 5 months
renard314/QuestCompass
Apr 2012 - Mar 2014
Contributions:24 commits in 1 year 11 months
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