Senior Full Stack Engineer (Desktop/Mobile Applications)

Expected, AWS, Java, Spring Boot, Angular, React.js, Windows, iOS, Android

About the project, We are seeking a Senior Full Stack Engineer to help build the next generation of a mission‑critical flight management system that delivers aeronautical charts and navigation databases to the general and business aviation market. The system is evolving into a modern, reliable, multi‑platform experience that lets aviation customers purchase, manage, download and load avionics data wherever they operate, including directly at the aircraft. This role is ideal for an experienced full‑stack product engineer who can work across desktop and mobile applications and modern cloud‑native backend services, strengthening a high‑impact aviation platform that keeps aircraft data current, compliant and ready to fly.

Your responsibilities, Develop and modernize desktop, mobile and AWS cloud hosted backend capabilities for a mission critical flight management system., Help design scalable, resilient end to end architecture across applications, backend services, cloud infrastructure and avionics data workflows., Build and enhance desktop and mobile application workflows using native, cross platform or modern frontend technologies., Develop and improve cloud native backend services, integrations, automated jobs and operational workflows used by client applications., Improve architecture, reliability, performance, maintainability, CI/CD, monitoring, high availability, disaster recovery and production support practices., Use AI augmented development tools (e.g. Claude, Codex or similar) to support design, implementation, debugging, testing, refactoring and code review while maintaining code quality, security and human accountability.

Solid experience developing and modernizing production software across applications and backend services in cloud environments, with a strong focus on cloud‑native solutions built on AWS., Strong background in backend development using Java and Spring Boot, including familiarity with cloud‑native architecture patterns and common operational practices (observability, scalability, security, resilience)., Hands‑on experience building user‑facing applications with modern frontend frameworks such as Angular and/or React., Practical experience developing cross‑platform desktop and mobile applications (Windows, iOS, Android) using native, cross‑platform or modern frontend technologies., Experience using AI‑assisted development tools (e.g. Claude, Codex or similar) to support development, testing and code review.

Optional, Background in aviation, navigation data, regulated or other mission‑critical software environments

What we offer, Location: Gdańsk Przymorze, Work model: flexible work model adjusted to your needs and preferences., Employment type: B2B contract via KUBO or UoP, Salary: competitive salary adjusted to your experience, Benefits: life insurance, private healthcare, Multisport card, and development support (co‑funding of cloud certification exams).

Benefits, sharing the costs of sports activities, private medical care, life insurance

Recruitment stages, Initial call with a KUBO recruiter Narek, Interview(s) with the client, Decision, feedback and support through offer and onboarding

This is how we work,