Nicolas Guillaumin - Head Of Group Services (COO) at zetcom

Nicolas Guillaumin

Head Of Group Services (COO) at zetcom

Bern, Bern, Switzerland

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Summary

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Senior

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Top School

Nicolas 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

Stats

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)

C#JavaC++CSSCGoHTMLPerl

Github contributions (5)

labexp/osmtracker-android

Feb 2010 - Mar 2018

GPS tracking tool for OpenStreetMap

Role in this project:

Full-stack Developer

Contributions: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.

geospatialgarmintrackingmapgps

beetbox/beets

Dec 2017 - Jan 2018

music library manager and MusicBrainz tagger

Role in this project:

Back-end Developer

Contributions: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.

clipythonmusicbrainztaggermusic

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