Senior Android Engineer (Kotlin, Jetpack Compose)

We are building a new, dedicated product team for a large-scale mobile application that connects software with the physical world — devices, sensors, and real-time data — and we are looking for a Senior Android Engineer to join from the ground up. This is a greenfield team setup — you will have direct influence on how the team works, what standards it follows, and how the product evolves. The application is built natively in Kotlin with Jetpack Compose, with a strong focus on offline-first architecture and reliable hardware integrations.

We need people who own their work end-to-end — engineers who have designed and implemented features from concept through production, who are comfortable modernizing legacy code (Java → Kotlin, XML → Compose), and who don't stop at the API layer: Bluetooth devices, external SDKs, and real-time data flows are part of the daily job. Your Android expertise will be essential, but equally important is your ability to take a loosely defined problem and deliver a working, well-crafted solution.

Your Responsibilities:

🔹 Design, develop, and maintain application screens and components using Jetpack Compose

🔹 Own features end-to-end — from design and architecture, through implementation, to production support and bugfixing

🔹 Integrate with external hardware and SDKs (Bluetooth-enabled devices, scanners, RFID readers) and ensure stable, reliable connectivity

🔹 Build offline-first functionality — local databases, data synchronization, and graceful handling of poor or missing connectivity

🔹 Implement real-time features (live data views, dynamic pagination, syncing views to changing data) with high performance in Compose

🔹 Modernize existing code — migrate legacy Java/RxJava code to Kotlin/Coroutines and XML layouts to Jetpack Compose

🔹 Own Android-specific platform integrations (permissions, push notifications, camera capture, deep linking, app lifecycle)

🔹 Integrate with backend services over REST and GraphQL, including import/export flows and offline data copies

🔹 Collaborate on architecture decisions and help establish best practices for the codebase

🔹 Write clean, testable, and well-documented code

🔹 Conduct thorough code reviews focused on quality, consistency, and shared standards

🔹 Collaborate closely with backend teams, QA, product managers, and designers in a cross-functional product team

Who Are We Looking For?

✅ Minimum 5 years of professional experience in native Android development

✅ Expert-level proficiency in Kotlin (Java background welcome)

✅ Strong, hands-on experience with Jetpack Compose in production applications

✅ Deep practical knowledge of Kotlin Coroutines and asynchronous programming

✅ Experience integrating with external hardware over Bluetooth and/or vendor SDKs (e.g. barcode/RFID scanners, fitness devices, payment terminals)

✅ Solid experience with local databases (Room, SQLDelight) and building offline-first applications

✅ Experience with REST and GraphQL APIs (Retrofit, Apollo Android)

✅ Hands-on experience with dependency injection frameworks (Dagger, Hilt, Kodein, or Koin)

✅ Proven track record of migrating legacy codebases (Java → Kotlin, XML → Compose)

✅ Strong knowledge of Android platform specifics: lifecycle, permissions, notifications, Play Store distribution

✅ Ownership mindset — responsible for outcomes, not just tasks, with a proactive, can-do approach to problem-solving; experience designing and delivering features independently

✅ Clear communicator and collaborative team player, comfortable working in a new and evolving team

✅ Fluency in Polish and communicative English (min. B2, written and spoken)

✅ Availability for occasional on-site sessions in Warsaw (workshops, kickoffs, planning events)

✅ Growth mindset with continuous learning and openness to new tools and approaches

Nice to Have:

✅ Experience with Kotlin Multiplatform (KMP) or Compose Multiplatform — or willingness to grow into it

✅ Experience with navigation/architecture libraries such as Appyx or Simple Stack

✅ Experience with maps and location-based features (Mapbox, Google Maps)

✅ Experience building kiosk-mode or dedicated-device (enterprise) applications

✅ Familiarity with Molecule or other reactive state-production patterns

✅ Experience with AI-assisted development tools (Claude Code, Cursor, GitHub Copilot)

✅ Experience with CI/CD tools for mobile applications (GitHub Actions, Bitrise, Fastlane)

✅ C/C++ and NDK experience

✅ Experience working at scale (large user base, complex systems)

✅ Experience joining or building a team from scratch

What Can You Expect from Us?

🌍 Fixed-term contract – with the possibility of extension

🌍 Career & Development – Trainings, workshops, and collaboration with top industry experts

🌍 Exciting Challenges – Work on products that bridge software and hardware, in award-winning projects

🌍 Supportive Team – Knowledge sharing during Wednesday Wisdom meetings & tech breakfasts

🌍 Autonomy & Innovation – We welcome your ideas and initiatives

🌍 Stable Collaboration – Clear, transparent B2B agreements in line with current regulations, ensuring mutual trust and predictability

🌍 Work-Life Balance – Flexible working hours and a culture that values personal time

🌍 Hybrid or Remote Work Model – It's up to you

🌍 Perks & Benefits – Private medical care, Multisport card, English lessons, training budget, and more

🌍 Trust & Transparency – Open communication and a culture of feedback

Join us as a Senior Android Engineer and help build reliable, hardware-connected mobile products while working in a collaborative, growth-focused team!