Senior Java Engineer - AI Platform (m/f/d) at Sport Alliance GmbH - Remote (Poland) | $110,000 - $140,000

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

Sport Alliance GmbH is hiring a Senior Java Engineer - AI Platform (m/f/d)

Job Description

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Sport Alliance GmbH is hiring a Senior Java Engineer - AI Platform (m/f/d)

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