Sebastian Deisel
Software Architect at LoyJoy
Münster, North Rhine-Westphalia, Germany
Summary
👤
Senior🎓
Top SchoolSebastian Deisel is a software architect based in Münster, Germany, with nine years of experience designing and delivering full-stack systems for startups and scale-ups. At LoyJoy he moved from senior full-stack developer to architect, shaping product and technical direction while keeping a hands-on approach to implementation. His background in Wirtschaftsinformatik (MSc/BS) underpins a pragmatic blend of business awareness and engineering rigor. Sebastian contributes to open-source mobile tooling—most notably enhancing the Nightscout iOS/WatchOS client to synchronize CGM data with Apple HealthKit, including unit handling and backfill support. He excels at bridging mobile, backend and data integration concerns, turning complex domain requirements into reliable user-facing features. Curious and methodical, he often focuses on subtle UX-data consistency issues that improve long-term system trust.
9 years of coding experience
7 years of employment as a software developer
Master of Science - MS, Wirtschaftsinformatik, Master of Science - MS, Wirtschaftsinformatik at Westfälische Wilhelms-Universität Münster
Github Skills (11)
healthkit10
data-sync10
swift10
ios10
mobile-development10
data-synchronization10
human-interface9
userdefaults9
graphical-user-interface9
user-interface9
unit-conversion8
Programming languages (8)
Github contributions (5)
nightscout/nightguard
Feb 2022 - Mar 2022
iOS and WatchOS Client for the Nightscout CGM System
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:5 reviews, 24 commits, 2 PRs in 1 month
Contributions summary:Sebastian primarily contributed to the iOS application, focusing on integrating the app with Apple HealthKit. They created and modified services to synchronize blood glucose data with Apple Health. The contributions include implementing authorization requests, data synchronization, and creating a user interface switch to manage health data sync preferences within the application. Further development included the enhancement of existing features to support health data backfilling and proper mmol unit support.
ioswatchos
sebdei/hackercv
Mar 2021 - Nov 2022
Contributions:16 reviews, 93 commits, 6 PRs in 1 year 7 months
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