Sebastien Guillemin
Senior Android Engineer at Qonto
Châteaugiron, Brittany, France
Summary
👤
Senior🎓
Top SchoolSebastien Guillemin is a Senior Android Engineer with a long-standing software career that began in 1999 and a focused expertise in Android, Java/Kotlin, architecture, and performance optimization. He has shipped Android work across startups and large clients (Zenly, leboncoin, Parrot, Betclic, Qonto) and pairs hands-on development with code audits, training, and cross-platform system understanding. Comfortable in Linux and web ecosystems, he has repeatedly stepped into architecture and mentoring roles, delivering complex UI work and OpenGL ES performance improvements. Based in Brittany, he thrives in multicultural teams, values clear communication to reconcile differing viewpoints, and is committed to environmental action at a personal level—a detail that often informs his pragmatic, sustainable approach to engineering.
4 years of coding experience
25 years of employment as a software developer
Computing, Computing at Université de Rennes IComputing, Computing at Newcastle University
French, English, Spanish, German
Github Skills (6)
kotlin-dsl7
jetpack-compose6
compose5
android5
kotlin4
jetpack4
Programming languages (1)
Github contributions (2)
mrlem/android-compose-template
May 2022 - Jul 2022
A template for your new Jetpack Compose app.
Contributions:4 commits, 1 PR, 6 pushes in 1 month
kotlin-dsljetpack-composejetpack-compose-appandroidcompose
mrlem/genesys
May 2023 - May 2023
Contributions:1 comment in 1 day
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