Freelancer profile translated to English.
Back to original languageAbout Guillaume
Freelance iOS developer for over 5 years, I design and deliver robust, tested, and scalable Swift/SwiftUI applications, from architecture to App Store deployment.
My commitment: well-structured code (MVVM, SOLID, BDD/TDD unit tests) that the next team can easily evolve.
I supported France Identité (Ministry of the Interior) during its growth from 10,000 to 100,000 users. I designed the MATT+ application from scratch for Magic Dream, a Bluetooth connected device with in-app purchase, NFC, and device fleet management. I also led a critical database migration at Moët Hennessy (LVMH).
I manage the entire cycle: specifications, architecture, development, deployment, and maintenance. My daily use of AI agents allows me to accelerate deliveries without sacrificing quality.
French
Native or bilingual
English
Fluent
Russian
Native or bilingual
Can work on-site
Paris (up to 50km), Lille (up to 50km), Brest (up to 50km), Lyon (up to 50km), Nice (up to 50km)
Experience
- MagicDreamiOS DeveloperRESEARCHJanuary 2024 - Today (2 years and 5 months)Paris, FranceI design and develop the iOS application for MATT+, a new Bluetooth connected device launched by Magic Dream, one of Europe's largest magic companies, from start to finish.I manage the project throughout its duration: writing specifications, developing the MVP, then the complete application within a team of 10 people (developers, designers, testers).The application integrates BLE Bluetooth communication with battery level and device status management, an in-app purchase system via StoreKit, device security via a Supabase backend database, as well as NFC features and an App Clip.Technical context: Swift, iOS, Android, SwiftUI, MVVM, Swift Concurrency, AppClip, CoreBluetooth, REST API, Combine, CoreData, NFC, BDD, Unit tests, Figma, Github, Supabase
- Ministère de l'IntérieuriOS DeveloperPUBLIC SECTORSeptember 2023 - December 2023 (4 months)Paris, FranceI joined the France Identité Numérique development team to support the transition from 10,000 to 100,000 users during the testing phase.My role: bug fixing, code review, creating technical documentation for network requests, integrating Figma mockups, and adding new features.Technical environment: iOS 16, Swift, SwiftUI, MVVM, GitLab, Jira, Figma, Scrum, Agile methods.
- GDTRiOS DeveloperDEFENSE AND MILITARYJanuary 2023 - July 2023 (6 months)Paris, FranceI took over the iTarget application, migrated it from UIKit to SwiftUI, and added new features.My responsibilities:- Migration of the UIKit application to SwiftUI.- Implementation of an MVVM architecture.- Modernization of the application with the addition of Combine.- Connection of a Bluetooth gyroscope and real-time data display.- Graphical display of gyroscope movements.Technical context: Swift, UIKit, SwiftUI, CoreBluetooth, Combine, MVVM, BDD, Unit tests, Github
Reviews
Recommendations
GB
LV
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- iOS Software Designer Developer, Computer Programming, Specific ApplicationsOpenClassrooms2021Développeur concepteur logiciel iOS, Programmation informatique, applications spécifiques
- Electronics - programming Arduino and derivatives, Electronics and programmingSelf-taught2017Électronique - programmation Arduino et dérivés, Électronique et programmation
Certifications
- iOS Software Designer DeveloperOpenClassrooms2021