Senior Android Developer (KMP)

What you work on today shapes where you’ll be tomorrow.

Looking for your next challenge as a Senior Android Developer? We may have the right opportunity for you.

At B3, we start with people and their experience. We match projects to your skills and professional growth path. Our consultants work across a wide range of industries and technologies, delivering IT projects both in Poland and internationally. This allows you to build your career in a deliberate way - not by chance.

We are part of an international organization listed on Nasdaq Stockholm, operating in 11 countries. In Poland, we operate with full autonomy. We choose our technologies, processes, and ways of working while maintaining the highest professional standards.

Join us today.

What we offer

• Work in a Scandinavian culture built on logic, trust, and open dialogue.

• Health and sports benefits tailored to your needs.

• Speed Coaching – short sessions designed to provide new perspectives and solutions.

• Sports training, an internal team, and opportunities to take part in competitions.

Scope of the role:

• Designing and building a mobile application for a TMS class system (Transportation Management System) - a solution built from scratch using Kotlin, Kotlin Multiplatform and Jetpack Compose

• Co-creating a new mobile team set up specifically for this project - real influence on the application architecture, working standards and technical decisions from day one

• Integrating the application with API interfaces and logistics systems, and using LLMs and agentic solutions to support the software development process (SDLC)

What you need to join us:

Must have:

• 5+ years of commercial exp. with Android development along with Kotlin Multiplatform (KMP)

• Expert knowledge of the Android SDK, different versions of Android and device configurations

• Experience with Jetpack libraries, Android Architecture components and the MVVM and Clean Architecture patterns

• Hands-on experience working with LLMs and agentic development, including workflows that support the SDLC process

• English B2+, Polish C1+ or native

• Eligibility to work in Poland (citizenship, residence card, visa, etc.)

Nice to have:

• Jetpack Compose and Coroutines

• Google's Android UI design principles, patterns, best practices and interface guidelines

• Pptimizing mobile apps in Java and Kotlin

• Firebase configuration

• Experience working with API interfaces to integrate data and functionality in mobile applications

• Good understanding of Agile methodologies