Nicolas Guillaumin
Head Of Group Services (COO) at zetcom
Bern, Bern, Switzerland
Summary
👤
Senior🎓
Top SchoolNicolas Guillaumin is a pragmatic technology leader and Head of Group Services (COO) based in Bern with 16 years of experience building and scaling engineering, implementation and customer service teams. He combines hands‑on full‑stack expertise (Java, Groovy, DevOps tooling) with operational leadership—having grown development teams from scratch, restructured services into specialist pools, and now manages 25+ colleagues across projects and support. Nicolas has a proven track record delivering complex integrations and migrations while optimizing cross‑team processes and tooling (Jira, Confluence) to reduce friction and scale the business. He actively contributes to open source projects such as OSMTracker-Android and beets, demonstrating continued engineering curiosity and attention to both UX and backend edge cases. A quick learner comfortable in international contexts, he pairs strategic vision with day‑to‑day technical mentoring and a habit of driving measurable process improvements.
16 years of coding experience
14 years of employment as a software developer
Baccalauréat STI, Baccalauréat STI at Lycée Leonard de Vincy (St Michel sur Orge)Computer Science, Computer Science at Université Paris Cité
French, English
Stackoverflow
811reputation
49kreached
10answers
4questions
Github Skills (24)
musicbrainz10
pytest10
python10
testing10
configuration-management10
user-interface10
media-library10
android-development10
java10
android-developer10
javas10
android10
android-developers10
music10
openstreetmap9
Programming languages (15)
Github contributions (5)
labexp/osmtracker-android
Feb 2010 - Mar 2018
GPS tracking tool for OpenStreetMap
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:305 commits, 7 PRs, 23 pushes in 8 years 1 month
Contributions summary:Nicolas appears to be primarily responsible for developing and maintaining the core functionality of the OSMTracker-Android application. The commits reveal the implementation of UI components and features, and the refactoring of underlying code, indicating significant involvement across both the frontend and backend of the mobile application. The user has worked on adding new functionalities such as text note taking and user customizable button layout.
gps-trackingopenstreetmapgpxosm
beetbox/beets
Dec 2017 - Jan 2018
music library manager and MusicBrainz tagger
Role in this project:Back-end Developer
Back-end DeveloperContributions:6 commits, 5 PRs, 21 comments in 3 days
Contributions summary:Nicolas primarily contributed to improving the music library manager's MusicBrainz integration. Their work focused on enhancing the autotagger by addressing issues related to non-audio media and tracks. They introduced settings to allow users to control which formats and tracks are ignored during the tagging process. This includes modifying the existing code to filter out unwanted media and tracks, as well as updating the configuration settings and documentation.
musicbrainzmusicpythonmusic-librarycli
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.