Senior Java Engineer

You'll be joining a multidisciplinary team of senior engineers within a Consumer & Merchant domain, working on end-to-end parcel creation flows and some of the company's largest technical initiatives. The team operates with high autonomy — engineers have real influence over architectural decisions and drive solutions from analysis all the way to production. The culture is built on knowledge sharing, mutual respect, and engineering excellence, with a genuinely friendly atmosphere.

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
• Experience with Microservices, Event-Driven Design, Transactional Outbox
• Knowledge of OAuth2 / JWT, Spring Security, OpenFGA
• Experience with Spock Framework, Testcontainers, WireMock, REST-Assured, ArchUnit, PIT Mutation Testing
• 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 — agentic, AI-first development is how this team operates