Senior Full Stack Mobile Developer

What you will do:

• Build and improve mobile features used by real customers.
• Develop shared business logic for mobile platforms, mainly using Kotlin Multiplatform (KMP).
• Build backend services and APIs using Java/Kotlin and Spring Boot.
• Work with cloud services, CI/CD pipelines, monitoring and production support.
• Improve performance, reliability, security and user experience.
• Use AI coding tools to help with development, testing, documentation and troubleshooting.
• Work closely with product, design, architecture, security and platform teams.
• Help define good engineering practices and mentor other developers.
• What we are looking for
• We are looking for a strong engineer, not just a person who knows one framework. KMP experience is a strong advantage, but it is not the only path into this role.
• Strong experience in mobile application development.
• Deep understanding of iOS & Android Architecture Components.
• Strong Kotlin skills and good understanding of modern mobile architecture.
• Experience building production-grade apps with good quality, performance and maintainability.
• Backend development experience with Java 7+ and Spring Boot.
• Understanding of APIs, microservices and event-driven systems.
• Experience with CI/CD, automated testing and production systems.
• Ability to take ownership of a feature from design to production.
• Good communication skills and ability to work with multiple teams.
• Cross-platform experience
• Our strategic direction is Kotlin Multiplatform, because it lets us reuse business logic while still keeping native-quality mobile experiences. However, we also welcome candidates with strong experience in other cross-platform technologies.
• Kotlin Multiplatform (KMP) experience is preferred.
• Flutter experience is relevant, especially if you worked on architecture, shared logic and production apps.
• React Native experience is relevant, especially if you worked on platform integration and complex mobile products.
• If you are strong in Flutter or React Native and willing to learn KMP, we want to talk to you.
• Backend and cloud experience
• Java 7+ and/or Kotlin backend development.
• Spring Boot and REST/API development.
• Microservices and distributed systems.
• Kafka or other event-based technologies.
• Cloud services, preferably AWS.
• High-scale or high-availability production systems.
• AI-assisted development
• We believe modern software development combines strong engineering fundamentals with the effective use of AI and automation.
• As part of our engineering culture, we follow a Specification-Driven Development (SDD) approach, where clear requirements, technical designs, examples, and tests are used to drive implementation and ensure high-quality outcomes.
• Use AI coding assistants such as GitHub Copilot, Cursor, Claude Code, Gemini Code Assist or similar tools.
• Use AI to help with code generation, unit tests, documentation, refactoring and debugging.
• Critically review AI-generated output and maintain high standards for code quality, security, performance, and maintainability.
• Be open to working with AI agents as part of the development lifecycle.
• Nice to have
• Experience in fintech, banking, payments or other regulated environments.
• Experience with Apple Pay, Google Pay or wallet/payment integrations.
• Experience building modular mobile apps or shared SDKs/libraries.
• Experience with observability, performance profiling and production incident analysis.
• Who will succeed in this role?
• A developer who can learn fast and is not afraid of new technologies.
• Someone who understands both product experience and system design.
• A person who can work independently but also collaborate well with others.
• An engineer who cares about clean code, reliability, security and customers.
• Someone who wants to be part of the next generation of AI-empowered full stack development.
• In simple terms: we are looking for a strong mobile-first full stack developer who can build customer-facing apps, connect them to strong backend services, learn KMP if needed, and use AI tools as part of a modern development workflow.
• We offer:
• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits
• not applicable for freelancers