Senior Mobile Developer (Kotlin)

About the role

Releasin is an innovative SaaS platform dedicated to the automation, tracking, and securing of software deployment processes. We enable engineering teams to accelerate their delivery cycles while guaranteeing the quality and stability of their applications. To develop and optimize our mobile applications for real‑time tracking and management of deployments, we are looking for a Senior Mobile Developer (Kotlin). Reporting to the Engineering team, you will be responsible for the design, architecture, and development of modern, high‑performance, and secure Android applications.

Responsibilities

• Design and develop complex mobile features in Kotlin, applying modern architectures (Clean Architecture, MVVM/MVI).
• Implement fluid, reactive, and ergonomic interfaces using Jetpack Compose and Material Design components.
• Consume backend REST and GraphQL APIs, and manage real‑time data flows with WebSockets and push notifications for CI/CD pipeline tracking.
• Optimize battery, memory, and bandwidth consumption while securing local data with EncryptedSharedPreferences and Keystore.
• Write unit and UI tests with JUnit, Mockk, and Espresso, and participate in setting up mobile CI/CD pipelines using Fastlane, Bitrise, or GitLab CI.

Requirements

• Minimum 5 years of proven experience in Android mobile development, with deep mastery of Kotlin.
• Excellent command of Kotlin, Coroutines, and the Flow component.
• Regular practice of Jetpack Compose and Android Jetpack libraries such as Room, Hilt/Koin, Retrofit, and Navigation.
• Solid mastery of Clean Architecture, MVVM principles, and design patterns.
• Experience integrating RESTful and GraphQL APIs and real‑time protocols.
• Knowledge of mechanisms for publishing and tracking applications on Google Play Store.
• Technical rigor, autonomy, analytical mind, reactivity to production constraints, and strong team spirit.
• Proficiency in technical French and English, both written and spoken.

Benefits

• Opportunity to contribute to the creation of essential mobile tools for developers and deployment managers.
• Work on modern architecture projects free of legacy technical debt (100% Kotlin / Jetpack Compose).
• Attractive package: competitive salary adjusted to your level of expertise.