Guillaume Bellut
Founder at Voila
Paris, Ile-de-France
Summary
🤩
Rockstar🎓
Top SchoolGuillaume Bellut is a seasoned mobile engineer and founder with 10 years of experience building and scaling consumer apps and leading cross-platform teams from Paris. He founded Voila, an iOS app with 10k+ users in seven languages, and grew it through a user-driven co-development model that shaped product roadmap and retention. At Sorare he transitioned from Senior iOS Engineer to Android Lead, improving stability, CI/CD, and Play Store rating from 4.0 to 4.3 while unlocking distribution with Google. Prior roles at EDF and Magency saw him modernize large mobile codebases, introduce MVVM/MVP, and drive sprint-based delivery and automated pipelines. A hands-on contributor to iOS open-source tooling, he has deep expertise in Swift migrations, camera UX/cropping fixes, and pragmatic architecture that bridges product and engineering.
10 years of coding experience
13 years of employment as a software developer
Master, MIAGE, option e-business et agilité des systèmes d'information, Master, MIAGE, option e-business et agilité des systèmes d'information at Université Paris NanterreDUT, Informatique, DUT, Informatique at Université Paris CitéBaccalauréat Scientifique, SVT, Baccalauréat Scientifique, SVT at Lycée Jean Monnet
English, French, Portuguese
Stackoverflow
9,006reputation
672kreached
44answers
33questions
alamofire
top-5%
swift
top-1%
Github Skills (15)
camera10
xcode10
cropper10
swift10
ios10
clipping10
croppie10
alamofire9
ui-design9
photo9
storyboard6
inout6
objective-c6
uitableview6
pointer6
Programming languages (10)
Github contributions (5)
AlexLittlejohn/ALCameraViewController
Sep 2017 - Oct 2019
A camera view controller with custom image picker and image cropping.
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:1 release, 29 commits, 18 PRs in 2 years 1 month
Contributions summary:Guillaume primarily focused on implementing and maintaining features within an iOS camera view controller project. Their contributions included adding a resizable cropping area, fixing cropping issues related to image zooming, and addressing scaling problems. They also upgraded the project to Swift 5 and addressed various UI-related issues and warnings.
controllerimage-pickercameracustom-imageswift
digital-magic-club/mentaldice-swift
Dec 2020 - Jan 2025
Contributions:2 releases, 30 pushes, 14 branches in 4 years 2 months
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