We are looking for a Senior Hybrid Mobile Developer to join our product engineering team at MAINSYS. You will play a key role in designing, building, and maintaining our mobile banking applications built on Ionic, Angular, and Capacitor.
Key Responsibilities
Development & Architecture
* Design, develop, and maintain hybrid mobile applications using Ionic 8+, Angular 18+, and Capacitor 7+
* Integrate complex authentication flows from third-party providers (OAuth 2.0, OpenID Connect, biometric SDKs) in a mobile context
* Integrate and manage third-party SDKs (payment, push notifications, analytics, security) while ensuring stability and performance
* Implement offline-first patterns, secure local storage, and efficient data synchronization
* Ensure cross-platform consistency across iOS, Android, and multiple device form factors
* Write and maintain comprehensive unit tests and contribute to end-to-end testing strategies
Technical Leadership & Analysis
* Conduct detailed technical analyses on complex topics and produce clear documentation to guide other developers in their implementation work
* Mentor junior and mid-level developers through knowledge-sharing sessions
* Act as a technical reference for the team on mobile-specific challenges
I/CD & Release Management
* Configure and maintain mobile CI/CD pipelines (Jenkins, Nexus, Fastlane) including build, test, and deployment stages
* Knowledge on the full mobile release lifecycle: code signing, provisioning profiles, store submissions (App Store / Google Play), and OTA updates
Security & Performance
* Apply mobile security best practices: certificate pinning, secure storage (Keychain/Keystore), code obfuscation
Your Profile
Education & Experience
* Degree in Computer Science or equivalent practical experience
* Minimum 5 years of professional experience in mobile or web development, with significant exposure to hybrid mobile frameworks
* Delivering production mobile applications
* French-speaking (working language); English proficiency is a strong asset
Core Technical Skills
* JavaScript / TypeScript (advanced)
* Angular 18+ and RxJS
* Ionic 8+ and Cordova / Capacitor 7+
* REST API integration
* Node.js ecosystem and NPM package management
* HTML5 / CSS3 (SCSS)
* Testing frameworks (Playwright)
* Git version control and branching strategies
Tooling
* IDEs: IntelliJ / WebStorm, VS Code, Xcode, Android Studio
* CI/CD: Jenkins, Nexus, Fastlane
* Project tracking: Jira
Nice to Have
* Knowledge of Java / Kotlin (Android) and/or Swift (iOS) for native plugin development or debugging
* Familiarity with AI-assisted development tools (e.g. Claude Code)
* Experience publishing and maintaining internal or public NPM libraries
* Understanding of deep linking, universal links, and push notification architectures (FCM / APNs)
* Exposure to mobile security auditing or penetration testing
* Implement and maintain accessibility standards (WCAG) across mobile interfaces
Soft Skills & Mindset
* Analytical and rigorous: you approach complex problems methodically and deliver well-reasoned solutions
* Team player: you collaborate effectively, value collective decisions, and build on existing architectural choices rather than systematically challenging them
* Pragmatic: you balance technical excellence with delivery constraints and know when "good enough" is the right call
* Proactive communicator: you document your work, share knowledge spontaneously, and flag blockers early
* Curious and engaged: you stay current with the fast-evolving mobile ecosystem (OS releases, framework updates, deprecations)
* Mentoring mindset: you find satisfaction in helping others grow and in elevating the overall quality of the team’s output
Our offer
* Work on a challenging project inside a young and dynamic team
* A competitive salary combined with extra-legal benefits, including a mobility budget with the option to choose between a company car and/or reimbursement for sustainable transport, and even, under certain conditions, reimbursement of your mortgage or rent.
* Access to our training platform
* Enjoy access to the Benefits@Work platform and its exclusive offers.
* Homeworking facilities (3 days/week)
* Homeworking full-time during three weeks in a row or separately (including from abroad).
A Macbook will also be provided for your work.
If you are this person, come and join us.
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