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September 10, 2026

Senior Android Software Engineer (Kotlin)

Senior • Remote

100 - 150 PLN/yr

Warsaw, Poland

Quick Facts

  • Senior Software Engineer for Android (Kotlin)
  • Focus: modern mobile architecture and reusable components

Description

We are looking for a Senior Software Engineer to join a team building and evolving modern mobile solutions used by thousands of users. The mobile platform is being developed towards a modern architecture based on Native Shells, Native Modules, WebView, and Server-Driven UI (SDUI), enabling multiple product teams to work independently while maintaining a seamless user experience, high performance, security, and scalability.

Scope of Services

  • Design and develop Android applications using Kotlin and modern Android technologies
  • Contribute to the design and evolution of the target mobile architecture
  • Design and implement Android Native Shells and reusable Native Modules
  • Support application modularization and scalability initiatives
  • Integrate native Android components with WebView and Server-Driven UI (SDUI) solutions
  • Develop and maintain the Android Design System, including reusable UI components, documentation, and development guidelines
  • Collaborate closely with Product Owners, UX Designers, Backend Engineers, and other stakeholders
  • Participate actively in technical discussions and architectural decision-making
  • Implement user interfaces with a strong focus on usability, accessibility, consistency, and user experience
  • Refactor existing codebases and improve application maintainability
  • Participate in code reviews and pair programming sessions
  • Mentor and support less experienced team members
  • Implement automated testing strategies and quality assurance processes
  • Define and promote coding standards, best practices, and development guidelines
  • Create and maintain technical documentation
  • Ensure ongoing maintenance and support of existing solutions
  • Drive continuous improvements within the development team
  • Contribute to CI/CD processes, release management, and application delivery through Google Play
  • Work in an Agile product development environment

Required Qualifications

  • Minimum 3 years of professional experience in Android application development
  • Strong commercial experience with Kotlin
  • Hands-on experience with Jetpack Compose
  • Hands-on experience with Hilt
  • Hands-on experience with Room
  • Hands-on experience with Kotlin Coroutines
  • Hands-on experience with Kotlin Flow
  • Hands-on experience with Retrofit or similar networking libraries
  • Solid understanding of MVVM
  • Solid understanding of Clean Architecture
  • Knowledge of SOLID principles, Object-Oriented Programming and design patterns
  • Experience designing and building complex mobile applications
  • Experience with application architecture and codebase refactoring
  • Understanding of mobile application security and secure data processing practices
  • Strong knowledge of Android UI/UX guidelines and best practices
  • Experience implementing accessible and user-friendly interfaces
  • Experience participating in code reviews and technical discussions
  • Ability to work independently and take ownership of delivered solutions
  • Strong collaboration and communication skills
  • English proficiency at B2 level or higher

Nice to Have

  • Experience in a Senior, Lead, Principal, or Tech Lead role
  • Experience with Native Modules, WebView-based architectures, or Server-Driven UI (SDUI)
  • Experience building or maintaining Design Systems and UI component libraries
  • Experience with mobile application modularization
  • Experience with Firebase Analytics or similar analytics platforms
  • Experience writing unit tests and automated tests
  • Experience with E2E testing tools such as Maestro
  • Familiarity with GDPR requirements in mobile applications
  • Experience using Git, Jira, and Confluence
  • Experience collaborating closely with UX teams and working with Figma
  • Strong understanding of accessibility standards and inclusive mobile design
  • Experience using AI-powered tools in daily software development
  • Experience building scalable mobile platforms supporting multiple product teams

What We Offer

  • Long-term cooperation within a stable and growing product environment
  • Influence over architecture and key technical decisions
  • Opportunity to work with modern Android technologies and architectural patterns
  • A high-impact role with real ownership and autonomy
  • Collaboration with experienced product, UX, and engineering teams
  • Hybrid working model (up to 5 on-site visits per year)

Tech Stack

Kotlin • Jetpack Compose • Hilt • Room • Coroutines • Flow • Retrofit • MVVM • Clean Architecture • Git • CI/CD • Firebase Analytics • Maestro • WebView • SDUI

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