Software Engineer (Android) - Service Agreement

City: Warsaw
Department: IT & Engineering

Recruiter: Marta Szymańska

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Rate: 130 – 170 PLN/hour (B2B)

We are looking for an experienced Software Engineer to join Flix on a freelance/service agreement basis (B2B contract). This is a contractor engagement for a seasoned professional who doesn’t just write code but thinks about the entire mobile ecosystem, including performance, quality, scalability, UX, and testing.  

Scope of Services

Bring expertise in building high-quality, scalable, and user-friendly Android applications to enhance the Flix passenger journey — optimizing key features such as post-booking and home page experiences, while incorporating innovative solutions that drive mobile development excellence. 

About the Engagement

  • Design, develop, and maintain high-quality Android applications with a focus on scalability, performance, and user experience.
  • Support closely iOS, Backend, and feature teams to align on feature specifications and ensure seamless cross-platform integration.
  • Drive technical improvements across the entire codebase, including architecture enhancements and codebase modernization.
  • Enhance app performance and user experience through UI optimizations, accessibility compliance, and improvements in battery usage, memory management, and load times.
  • Leverage analytics & metrics to make data-driven decisions, optimizing performance and engagement based on user behavior and app health.
  • Write clean, maintainable, high quality and testable code, ensuring high test coverage through unit, integration, and UI tests to guarantee reliability.
  • Actively contribute to improving CI/CD pipelines, app stability, and release processes, driving faster delivery and higher productivity.
  • Maintain clear, up-to-date technical documentation, including API specs, architectural decisions, and code comments, fostering transparency and knowledge sharing within the stakeholders. 

About You

  • 6+ years of Android development experience with a proven track record of building high-quality, user-facing Android apps. 
  • Strong expertise in Kotlin (Jetpack Compose, MVVM, Coroutines), with a deep understanding of Android architecture and best practices. 
  • Hands-on experience with performance optimizations, background services, memory management, and smooth user interactions (UI, animations). 
  • Experience with testing (unit, integration, UI testing) and a strong commitment to writing testable, maintainable code. 
  • Ability to drive technical strategy, ensuring high standards in code quality, performance, and scalability. 
  • Understanding of SOLID principles and software architecture patterns. 
  • Experience working with CI/CD pipelines and automated deployment systems (GitLab, Fastlane, Docker). 
  • Experience with Firebase SDK, including Firebase Analytics, Remote Config, and Crashlytics. 
  • Customer-centric approach with a focus on delivering great user experiences. 

Cooperation model

  • Cooperation based on a service agreement (B2B/freelance contract), not an employment contract.
  • You will operate as an independent contractor, responsible for delivering agreed services and submitting invoices 
  • Location: open for contractors based in Poland

 

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Voluntary Gender Identification

Dear potential Flixie, 

At Flix, we are committed to fostering diversity and inclusion. To support this initiative, we invite all applicants to complete our demographic questions on voluntary basis. Your responses will be processed as anonymized data and not linked to your profile, and thus assessed for statistical purposes and internal research. 

If you prefer not to provide this information, simply click on "I do not wish to answer." Be assured that neither the decision not to participate nor your answers will have an impact on your application, and your answers will remain anonymous and unidentifiable to you individually. The decision on your application will be made independently from your participation and the information you provide. 

We appreciate your cooperation in advance! 

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