Senior Java Engineer - AI Platform (m/f/d)
Remote (Poland)
Sport Alliance – AI Speedboat /
Full-time /
Remote
We are looking for a Senior Backend Engineer to join our AI speedboat team at Sport Alliance. You’ll be the technical backbone of our AI platform, designing and building Java services for multi-agent conversational AI, predictive analytics, and member engagement. This hands-on role lets you own the architecture and implementation of production AI systems in a small, fast-moving team.
Salary range: 22,000 - 26,000 PLN net + VAT B2B
Your position in our team
- Lead the design and development of core Java services powering our multi-agent AI platform.
- Architect integrations with Magicline ERP for memberships, bookings, and payments.
- Build LLM orchestration infrastructure, managing prompts, model routing, and fallback strategies.
- Implement authentication, authorization, and multi-tenancy for enterprise clients.
- Develop data pipelines and feature stores to feed predictive ML models.
- Create robust APIs, monitoring, and automated testing for AI systems.
- Contribute to key technical decisions around model selection, deployment, and scaling.
Your profile
- 5+ years in backend (Java) or full-stack engineering.
- Strong system design: microservices vs monoliths, synchronous vs asynchronous patterns.
- Hands-on with Java frameworks (Spring Boot), API design, and database modeling.
- Familiarity with AI/ML infrastructure or building integrations with ML models.
- Experienced in multi-tenant SaaS, CI/CD, monitoring, and production operations.
- Collaborative mindset: code reviews, mentoring, and technical discussions.
- Fluent English (C1); German is a plus.
- Nice to have:
- Full-stack: React + TypeScript
- Experience with prompt engineering, agent frameworks, or LLM-powered apps
- Background in B2B SaaS, ERP, CRM, or complex operational platforms
- Event-driven architectures, Kafka, RabbitMQ
- GDPR & EU AI Act knowledge
- Experience in fitness, health, or membership-based businesses
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
