Mobile Software Engineer (x/f/m)

About the role

This position invites a mobile engineer to take ownership of the foundational layers of a health platform used by millions. You will architect and deliver the mobile experience that members depend on every day for managing their well-being and accessing care. The work sits at the intersection of product innovation and technical excellence, directly advancing a mission to make healthcare proactive and universally accessible. Collaboration with cross-functional squads will be constant, requiring you to translate complex health domain logic into , reliable interfaces. Your contributions will shape the technical direction of the apps as the organization scales across international markets.

Key facts

What you'll do

• Architect, develop, and continuously refine the core mobile application infrastructure to guarantee high performance, scalability, and code quality throughout international expansion efforts.
• Craft intuitive, polished, and engaging user interfaces that members interact with daily, ensuring a delightful and accessible experience across diverse devices.
• Design and ship features that empower members to visualize health metrics, monitor wellness progress, and achieve personal health objectives through actionable insights.
• Extend the application capabilities to deliver personalized health recommendations and tooling that supports sustainable, long-term behavioral changes.
• Collaborate closely with product managers, designers, and backend engineers to define specifications, estimate effort, and iterate rapidly on new functionality.
• Implement automated testing strategies, including unit, integration, and end-to-end tests, to maintain stability and prevent regressions in production releases.
• Optimize application startup time, memory footprint, and battery consumption through profiling and platform-specific tuning on both iOS and Android.
• Manage and improve continuous integration and delivery pipelines to accelerate release cadence and ensure reliable deployments to app stores.
• Investigate and resolve complex production issues, leveraging advanced debugging tools and observability platforms to minimize member impact.
• Mentor fellow engineers through code reviews, pair programming sessions, and knowledge-sharing initiatives to elevate overall team craftsmanship.
• Stay current with evolving mobile ecosystems, evaluating new libraries, OS capabilities, and architectural patterns for potential adoption.
• Contribute to internal developer tooling and shared component libraries to increase development velocity and enforce consistency across the codebase.

Requirements

• At least two years of professional experience building and shipping mobile software in a production environment.
• Deep, hands-on expertise with React Native and the Expo ecosystem, including the managed and bare workflows.
• Solid practical experience in native iOS development using Swift or Objective-C, and native Android development using Kotlin or Java, with a clear understanding of platform-specific performance optimizations.
• A track record of successfully releasing mobile applications to the Apple App Store and Google Play Store across multiple international markets.
• Proficiency with mobile testing frameworks and debugging tooling to ensure code reliability and rapid issue resolution.
• Strong collaborative mindset with a genuine enthusiasm for learning from peers and sharing technical knowledge openly.
• Full professional fluency in English, both written and verbal, for effective communication within a distributed international team.
• Legal authorization to work in France, Belgium, or Spain without requiring visa sponsorship from the company.

Nice to have

• Direct experience managing the end-to-end mobile app store submission process, including compliance, metadata optimization, and release rollout strategies.
• Familiarity with health data standards, privacy regulations (such as GDPR), or previous work in digital health, insurtech, or fintech domains.
• Contributions to open-source mobile projects or active participation in the React Native community.
• Experience with GraphQL clients, offline-first architectures, or real-time data synchronization patterns.
• Knowledge of accessibility best practices (WCAG, VoiceOver, TalkBack) to build inclusive interfaces.
• Exposure to backend development or infrastructure-as-code tooling to facilitate full-stack feature ownership.

Skills & tools

• React Native, Expo (Managed & Bare Workflow)
• iOS Development: Swift, Objective-C, Xcode, Instruments
• Android Development: Kotlin, Java, Android Studio, Profiler
• Testing: Jest, React Native Testing Library, Detox, Appium, XCUITest, Espresso
• Debugging & Observability: Flipper, Sentry, Datadog, Firebase Crashlytics
• CI/CD: GitHub Actions, Bitrise, Fastlane, EAS Build
• Architecture: TypeScript, Redux Toolkit / MobX / Recoil, GraphQL (Apollo / Urql)
• Version Control: Git, GitHub, Trunk-based Development

Practical notes

• Candidates must hold valid work authorization for France, Belgium, or Spain; the organization does not provide visa sponsorship or relocation packages for this contract role.
• A flexible hybrid work model is offered: you may choose to work from company offices, a sponsored co-working membership, or operate fully remotely from within the eligible countries.
• The recruitment process welcomes applications from all backgrounds; you are encouraged to apply even if your experience does not match every single listed requirement perfectly.
• The interview loop typically involves an initial screening, a technical discussion or live coding session focused on React Native and native internals, a system design conversation, and a final cultural alignment interview.
• Contract terms, daily rates, and benefits are negotiated individually based on experience level and country of residence.