Nikolaj Simonsen
Senior Software Engineer at FOSS
Copenhagen Metropolitan Area Denmark
Summary
👤
Senior🎓
Top SchoolNikolaj Simonsen is a Senior iOS Engineer with about eight years of professional experience designing and maintaining production-grade apps across consumer, regulated pharmaceutical, and hardware-connected products. He specializes in modern Swift, strict concurrency, The Composable Architecture, and modular SPM packages, and practices test-first development with an emphasis on root-cause fixes and long-term maintainability. Nikolaj has led architecture and cross-team coordination on large consumer apps with hundreds of thousands of users, and delivered software under strict regulatory requirements for medicine production. Recently he’s focused on BLE-enabled hardware integration and improving developer workflows with AI tools like Claude Code. Based in Copenhagen, he combines hands-on implementation with mentoring and pragmatic engineering judgment formed by years of owning and maintaining code.
8 years of coding experience
10 years of employment as a software developer
B.Sc. Medialogy, Computer Science, B.Sc. Medialogy, Computer Science at Aalborg UniversityStudent, Mathematical, Student, Mathematical at Fjerritslev GymnasiumM.Sc. Software Development, Computer Science, M.Sc. Software Development, Computer Science at IT-Universitetet i København
Danish, English
Stackoverflow
1,650reputation
193kreached
26answers
21questions
Github Skills (16)
launchdarkly10
sdk8
feature-flags8
objective-c7
swift7
autolayout6
iframe6
uitableview6
ios6
cocoa-touch6
android6
uilabel6
push-notifications6
uiview6
wkwebview4
Programming languages (2)
Github contributions (5)
NikolajMosbaek/100DaysOfSwiftUI
Apr 2022 - May 2022
Contributions:8 commits, 6 pushes in 1 month
NikolajMosbaek/AboutMeGame
Jun 2026 - Jul 2026
Contributions:39 pushes, 50 branches, 3 issues in 28 days
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