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Key responsibilities As a Senior Android Engineer you will be responsible for: Designing, building and maintaining high performance, reusable, and reliable Kotlin code. Delivering analysis and development for high performance, reliable, secure and scalable applications. What you need to succeed Android tech stack: Screens: MVVM Databinding Async one shot: coroutine. Async stream: RxJava3 DI: Manual injection in one project, Koin in another, Hilt in another. Tests: Junit5, Kotest, Strikt. Persistence: Room, DataStore. Crash reporting: Sentry. Build system: Gradle 6.5. CI: CircleCI, Github. Network: Retrofit, OkHttp3, Gson, Moshi. Maps: Google Maps in one project, Mapbox in the other. App distribution: Firebase. Navigation: navigation library combined with a custom solution BFF (backend for frontend) - Ktor (Kotlin), Django (Python), AWS. Strong communication skills, written and verbal (English, C1). Nice to have: Critical thinking Proactivity and self-organisation About us We design, build and scale web and mobile apps with aspiring entrepreneurs, startups and enterprise customers. We're a leading digital agency running a number of our own companies (in various industries - mobility, gaming, coffee) along with working with game changing international startups and Fortune 500 customers This unique mix gives us a special perspective and allows us to keep growing and learning about new markets, technologies and libraries We support our customers on every step of the way - from a go-to-market concept all the way to blitzscaling and going global Our cross-functional teams cover all parts of the process -from market research, business development and strategy, through rapid prototyping and product design, to backend, frontend and mobile development Tango has been built on the principles of a supportive, open community - a place where we, its founders, would proudly apply to work ourselves. We’re not a 9-5, clock-punching bunch. We - you and us - are here to build a product you will be proud of, one that scales and shines Recruitment steps: 30-minute call Recruitment task (if needed) 60-minute call with one of our Senior iOS Engineers Confidence can sometimes hold us back from applying. However you identify, please apply if this is a role that would make you excited to work in. If you are living abroad and want to move to Poland-we are happy to help