Senior Android Developer (KMP)

b3consultingpoland; Warszawa; Hybrid; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Health and sports benefits

Speed Coaching

Team sports and competitions

Scandinavian culture and open dialogue

Job summary

B3 Consulting Poland is seeking a Senior Android Developer to design and build a mobile TMS-class system from scratch, using Kotlin, Kotlin Multiplatform and Jetpack Compose. You will help form a new mobile team and shape architecture and standards from day one.

Join a culture focused on learning and innovation, with opportunities to work across Poland and internationally while applying LLMs to streamline SDLC workflows.

Qualifications

• 5+ years of commercial exp. with Android development and Kotlin Multiplatform (KMP).
• Expert knowledge of the Android SDK and device configurations.
• Experience with Jetpack libraries, Android Architecture components and MVVM/Clean Architecture.
• Hands-on experience with LLMs and agentic development for SDLC support.
• English B2+, Polish C1+ or native; eligible to work in Poland.

Responsibilities

• Designing and building a mobile application for a TMS class system using Kotlin, Kotlin Multiplatform and Jetpack Compose.
• Co-create a new mobile team setup for this project with influence on architecture and standards from day one.
• Integrate the application with API interfaces and logistics systems and leverage LLMs to support SDLC processes.

Skills

Android development

Kotlin Multiplatform

Jetpack

MVVM

Clean Architecture

LLMs

Agentic development

Tools

Firebase

Job description

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