Senior Mobile App Developer (Android)

About the Position

Senior Mobile App Developer (Android)

Poland

We are looking for an Senior Mobile App Developer with a passion for pushing mobile technologies to the limits. If you are passionate about technology and constantly striving to learn and improve your skill set, you'll thrive here.

Why Join Exadel

We’re an AI-first global tech company with 25+ years of engineering leadership, 2,000+ team members, and 500+ active projects powering Fortune 500 clients, including HBO, Microsoft, Google, and Starbucks.

From AI platforms to digital transformation, we partner with enterprise leaders to build what’s next.

What powers it all? Our people are ambitious, collaborative, and constantly evolving.

About the Client

An international transportation technology company focused on building scalable digital solutions for modern rail operations. The organization develops internal platforms and automation tools that improve operational efficiency, support business growth, and streamline complex processes in a fast-paced environment.

Project Tech Stack

• Kotlin
• Jetpack Compose
• MVVM
• Clean Architecture
• GraphQL
• Firebase Remote Config
• Crashlytics
• Dagger/Hilt
• Espresso
• Robolectric
• JUnit
• GitLab CI/CD
• Fastlane
• Docker

Responsibilities

• Design, develop, and maintain high-quality Android applications
• Collaborate closely with Backend, iOS, and cross-functional teams
• Drive technical improvements and contribute to architecture decisions
• Optimize application performance, scalability, and user experience
• Ensure high engineering quality through testing and code reviews
• Mentor and support other engineers within the team
• Contribute to technical documentation and development best practices
• Stay up to date with modern Android technologies and industry trends

Requirements

• Solid, senior-level experience in Android development
• Strong expertise in Kotlin and modern Android development
• Experience with Jetpack Compose, MVVM, Coroutines, and Clean Architecture
• Strong understanding of Android architecture patterns and SOLID principles
• Experience with unit, integration, and UI testing
• Knowledge of GraphQL or REST API integrations
• Experience delivering scalable, maintainable, and high-quality mobile applications
• Strong communication and collaboration skills
• Experience working in Agile environments

Nice to Have

• Experience with Kotlin Multiplatform Mobile or React Native
• Knowledge of Firebase tools and mobile analytics
• Understanding of UI/UX principles and mobile accessibility
• Experience with CI/CD pipelines and release automation

English Level

Upper-Intermediate

We Offer

• International projects
• In-office, hybrid, or remote flexibility
• Medical healthcare
• Recognition program
• Ongoing learning & reimbursement
• Well-being program
• Team events & local benefits
• Sports compensation
• Referral bonuses
• Top-tier equipment provision

About the Company

We lead with trust, respect, and purpose. We believe in open dialogue, creative freedom, and mentorship that helps you grow, lead, and make a real difference. Ours is a culture where ideas are challenged, voices are heard, and your impact matters.

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