Senior Java Developer (Spring Boot)
First seen by Alion on Oct 20, 2026.
We are looking to connect with senior Java developers for upcoming client projects and potential long-term collaboration.
What you will do
Design and build backend services with Java and Spring Boot
Integrate AI services (RAG, agents) into existing enterprise applications via REST, messaging and events
Work with legacy systems: understand, refactor and extend them safely
Design APIs, data models and integration flows
Deploy on Kubernetes together with our DevOps engineers
Must have
5+ years of professional Java development, at least 3 years with Spring Boot
Experience with enterprise integration: REST, Kafka or RabbitMQ, relational databases (PostgreSQL, Oracle or similar)
Docker and basic Kubernetes
English at B2 level or higher
Working hours overlapping with UTC+0 to UTC+4
Nice to have
Experience integrating LLMs or AI services into Java applications (e.g. Spring AI, LangChain4j)
Security standards: OAuth2, Keycloak, SSO
German language skills
What we offer
Challenging projects at the intersection of enterprise systems and AI
Opportunities to work with modern technologies and solve real-world engineering problems
Long-term collaboration opportunities
Fully remote work
A small, experienced team that values engineering quality