Full-Stack Engineer - AI Platform (m/f/d)
Remote (Poland)
Sport Alliance – AI Speedboat /
Full-time /
Remote
Join our high-velocity AI Speedboat team as a Full-Stack Engineer! We build AI-native products transforming fitness businesses across Europe, the US, and the UK. You’ll own end-to-end AI solutions—from backend services to user-facing interfaces—in a small, autonomous team shipping real products to real customers.
Salary range: 22,000 - 26,000 PLN net + VAT B2B
Your position in our team
- Backend (Java)
- Build and maintain Java services powering our AI platform, APIs, data pipelines, and ERP integrations
- Develop LLM orchestration, context management, and conversation state handling for our Nexus agent
- Implement authentication, rate limiting, cost optimization, and observability tooling
- Frontend (React / TypeScript)
- Build chat widgets, dashboards, and self-service tools for the AI agent
- Integrate AI features into Magicline interfaces for a seamless user experience
- Enable analytics, workflow builders, audience segmentation, and campaign tools
Your profile
- 5+ years building production web apps with strong backend (Java/Spring Boot) and frontend (React/TypeScript) skills
- Experience with real-time interfaces (WebSockets, SSE, polling) and modern state management (MobX, Redux)
- Comfortable with web fundamentals: HTTP, REST APIs, responsive design, and component libraries (MUI or similar)
- Skilled at writing automated tests and maintaining high code quality
- Strong collaboration skills; you thrive in cross-functional teams
- Fluent English (C1); German is a plus
- Nice to have
- Exposure to AI/ML products, chat interfaces, or data visualization libraries (D3, Recharts)
- Knowledge of accessibility standards (WCAG), internationalization, B2B SaaS, ERP, or CRM
- Understanding of prompt engineering, agent frameworks, or AI observability
Your benefits with us
- Benefits package – private medical care and a sports card to support your health and well-being
- Flexible working hours – manage your schedule and enjoy a real work-life balance
- Flexible work model – work fully remotely or combine it with on-site collaboration at our modern office in Warsaw
- Flexible employment options – choose the type of contract that best suits your needs
- Access to Udemy Business – grow your skills with thousands of high-quality online courses
- Unique experience in the Fitness and SaaS industry – join a market-leading company in a dynamic, fast-growing field
- International team – collaborate with talented colleagues from around the world in a diverse and inclusive environment
- Unforgettable company events – take part in engaging team-building activities and memorable celebrations
- No dress code – express your personal style and feel comfortable at work
