Freelancer profile translated to English.
Back to original languageAbout Julien
Senior Android Developer with over 10 years of experience in designing and modernizing high-stakes technical Android mobile applications.
I work on complex codebases to improve maintainability, reduce technical debt, and strengthen mobile architectures. My work aims to design reliable, scalable Android applications and simplify complex issues to ensure their long-term evolution.
I also support teams in modernizing their development tools and improving their collaboration practices to build solid technical foundations.
My goal: to make your teams as strong as your Android codebase.
French
Native or bilingual
English
Fluent
Spanish
Conversational
Can work on-site
Paris (up to 50km), Lille (up to 50km), Nantes (up to 50km), Bordeaux (up to 50km), Lyon (up to 50km)
Experience
- BforBankAndroid DeveloperBANKING AND INSURANCEFebruary 2023 - Today (3 years and 4 months)Paris, FranceContext & ScopeDevelopment and evolution of a large-scale native Android banking application, developed in Kotlin, providing access to bank accounts and enabling sensitive financial transactions in a highly regulated environment.Key Contributions• Maintenance and evolution of the application with a strong focus on stability and reliability• Development of new features and redesign of critical workflows (payment, authentication, consent)• Continuous improvement of code quality and reduction of technical debtTechnical Focus• Modularization of the codebase and architecture improvements based on Clean Architecture and MVVM• Development with modern Android components (Jetpack Compose, Coroutines, Hilt)• Security-oriented development for sensitive operations• Implementation of CI/CD pipelines combining GitLab CI and Bitrise to automate builds, ensure reliable deliveries, and integrate quality controls• Continuous code quality analysis using tools (SonarQube, Detekt, Packmind)
- McDonald'sAndroid DeveloperRESTAURANTS AND FOOD SERVICEMarch 2022 - February 2023 (1 year)Paris, FranceContext & ScopeDevelopment and maintenance of McDo+, a large-scale native Android application developed in Kotlin, enabling in-store, delivery, and click & collect orders in McDonald's restaurants in France.Key Contributions• Maintenance and evolution of the application with a strong focus on stability, performance, and scalability• Development of features such as Nutri-Score, Click & Ready Parking, recommendations, in-app messaging, Codeciné, and Monopoly• Continuous improvement of code quality and reduction of technical debtTechnical Focus• Development with modern Android components (Jetpack Compose, Coroutines, Koin)• Migration of legacy XML screens to Jetpack Compose• Improvement of the architecture based on Clean Architecture and MVI• CI/CD automation (Bitrise) and continuous code quality analysis (SonarQube)
- France TélévisionsAndroid DeveloperPRESS AND MEDIANovember 2018 - March 2022 (3 years and 3 months)Paris, FranceContext & ScopeDevelopment and maintenance of several native Android media applications (franceinfo, 1ere Outremer, France 3 Régions), developed in Java and Kotlin, providing access to information as well as audio and video content on mobile and tablet.Key Contributions• Maintenance and improvement of several applications with a strong focus on stability and user experience• Development of new features related to content access, user engagement, analytics, and consent management• Contribution to the evolution and redesign of major functional areas within the applicationsTechnical Focus• Improvement of the architecture based on Clean Architecture and MVVM• Integration of analytics, trackers, and user consent management (CMP)• Redesign of audio and video players, global navigation, and key application sections• Implementation of Android features such as widgets and deep links• Implementation of automated CI/CD jobs and delivery pipelines (Jenkins)• Continuous code quality analysis (SonarQube)
Recommendations
+1
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
- Software Architect, Application DeveloperETNA2015L’ETNA est une école d'informatique BAC+5 proposant un cursus de 3 ans en alternance. Elle fonctionne avec une pédagogie par projets (individuels/groupe) afin d'immerger au maximum les étudiants dans le monde de l'entreprise.
- BTS IT and Networks for Industry and Technical Services (IRIS)CFA Dorian2012Le BTS IRIS est un diplôme BAC+2 proposant un cursus de 2 ans en alternance. Celui-ci est orienté sur 2 axes majeurs : de la programmation à 80% et du réseau pour les 20% restant.