Senior Java Engineer / Mateusz Król

Antal is a leading recruitment and HR advisory company, present in Poland since 1996 and later expanded to the Czech Republic and Hungary. Across the CEE region, they employ around 150 professionals who deliver a full range of services – from specialist and executive recruitment, employee outsourcing and HR consulting, to employer branding and market research. Their division-based structure combines deep industry expertise with functional specialisation, enabling tailored solutions for companies in every sector. They act as a trusted partner for both employers and candidates, sharing knowledge and guiding them through every stage of the talent journey.

Must have:

• Strong, hands-on experience with Java 21+ and Spring Boot MVC
• Solid knowledge of Kafka, PostgreSQL and/or MongoDB
• Familiarity with Hexagonal / Clean Architecture
• Proficiency with AI coding tools — Claude Code is the team standard; experience with agentic development workflows is a strong plus

Nice to have:

• Experience with Spring WebFlux (reactive stack)
• Familiarity with OpenFGA or similar fine-grained authorisation systems
• Background in Consumer-Driven Contract testing (Spring Cloud Contract)

• Design and implement microservices following Hexagonal Architecture principles within a large-scale distributed system
• Drive topic analysis and requirement discovery from business needs to solution architecture and delivery
• Build and maintain event-driven integrations using Kafka, Avro, and the Transactional Outbox pattern
• Write comprehensive automated tests: unit, integration, contract (Spock, Testcontainers, Spring Cloud Contract)
• Participate actively in code reviews and help raise the bar on code quality
• Work in a CI/CD environment: GitLab CI, Docker, Kubernetes + Helm (GitOps)
• Use AI-assisted development tools (Claude Code is the team standard) as a primary daily productivity tool