Top 3 Reasons To Join Us
Attractive Salary & Bonus + Challenging projects
Working with top developers from Europe
Unlimited chances for promotions, self-development
The Job
The Job
We are looking for a Senior Android Developer to join our mobile team and build high-quality applications for international clients in Poland, the US and Europe.
Your Responsibilities
- Design, develop and maintain high-performance Android applications.
- Develop new features using Kotlin-first modern Android development.
- Maintain legacy modules written in Java when required.
- Design and maintain reusable Android libraries, SDKs, and internal frameworks used across multiple projects.
- Work with REST APIs, WebSocket, real-time data systems.
- Optimize app performance, memory usage, startup time and network efficiency.
- Write clean, maintainable, and testable code.
- Collaborate with backend developers, QA engineers, UI/UX designers and Project Managers.
- Participate in code review and technical discussions.
- Continuously evaluate and adopt modern Android technologies to improve development efficiency.
Tech Stack
Languages
- Kotlin (primary)
- Java (for legacy modules)
Architecture
- MVVM
- Clean Architecture
- Modular architecture (multi-module projects)
Android Jetpack
- ViewModel
- LiveData
- Navigation
- Room
- DataStore
Concurrency
- Kotlin Coroutines
- Flow
- Thread management & background processing
UI
- XML UI
- Jetpack Compose (preferred for new modules)
Networking
- RESTful APIs (JSON)
- WebSocket
- Retrofit / OkHttp (or similar libraries)
Database
Cloud & Services
- Firebase
- AWS services (S3, SES)
- Google Maps API
Notifications
- Firebase Cloud Messaging (FCM)
- Pushwoosh
Tools
- Git / Git Flow
- Gradle
- Android Studio
- CI/CD pipelines (GitHub Actions, Bitrise, Jenkins or similar)
Your Skills and Experience
Core Requirements (Senior Level)
- 3+ years of professional Android development experience
- Strong experience with Kotlin
- Good knowledge of Java for maintaining legacy modules
- Strong understanding of:
- Object-Oriented Programming (OOP)
- SOLID principles
- Android app architecture (MVVM / Clean Architecture)
- Experience with Android SDK and Android Studio
- Experience working with RESTful APIs and mobile networking
- Experience with offline storage and caching
- Experience with multi-threading, concurrency, and performance optimization
- Experience using Git version control
- Experience debugging complex issues and optimizing application performance
Nice to Have
- Experience building reusable Android libraries, SDKs, or internal frameworks
- Experience with modular Android architecture
- Experience with Jetpack Compose
- Experience working with CI/CD pipelines
Media Experience (Strong Advantage)
- Experience working with video streaming technologies
- ExoPlayer
- HLS / MPEG-DASH streaming
- Basic understanding or experience with DRM systems
- Experience integrating video player SDKs
Soft Skills
- Creative, ambitious and proactive mindset
- Strong problem-solving skills
- Good communication in English (reading and writing technical documentation)
- Team-oriented but able to work independently
Why You'll Love Working Here
Our Core Values
- We build quality and truly useful products that help people
- We prefer freedom and responsibility over rigid control
- We encourage creativity and innovation
- We make our employees more competent and valued every day
Benefits
- Attractive and competitive salary with annual review
- Opportunity to work with cutting-edge technologies
- Energetic, open and transparent working environment
- Unique and challenging projects with international clients
- Friendly international team using Agile methodology
- Company social and team-building events
- Flexible working hours
