Java Developer with Kafka

Our client needs the support of an experienced Java Backend Developer to help build a brand-new greenfield platform that will act as a central component in the wider lending ecosystem. It is developed in Java 21+ using Spring Boot and JPA, integrates with multiple surrounding systems via REST APIs and Kafka-based event streaming, and places strong emphasis on clean architecture, scalability, maintainable code, and clear ownership. Liquibase is used for database change versioning, and AI-assisted tools such as GitHub Copilot support day-to-day development. The team works in an Agile setup, closely collaborating with Business SMEs and the Product Owner, with English as the primary working language.

Responsibilities

• At least 8 years of experience working with Java, ideally on backend systems
• Strong hands-on experience with Java 21+
• At least 8 years of experience with Spring Boot
• At least 8 years of experience working with JPA for persistence
• Practical experience with Maven as a build and dependency management tool
• Experience using Kafka for event-driven communication and integrations
• Experience with Liquibase for database change versioning
• Familiarity with Cucumber or similar tools for automated testing (nice to have)
• Comfortable working in an Agile team, using English as the primary working language
• Good command of English, both spoken and written (min. B2)

Requirements

• Build and evolve a modern backend using Java 21+ and Spring Boot
• Design and implement integrations with surrounding systems through REST APIs and Kafka event streaming
• Implement business logic and the persistence layer using JPA, with a strong focus on clean architecture and maintainable code
• Use Liquibase to handle database change versioning in a controlled and transparent way
• Leverage AI-assisted development tools (e.g. GitHub Copilot) to improve productivity, code quality, and development flow
• Work as part of an Agile team, participating in planning, refinement, reviews, and continuous improvement activities
• Collaborate closely with Business SMEs and the Product Owner to clarify requirements and co-design solutions
• Take active ownership of delivered components, ensuring their reliability, performance, and long-term maintainability

Benefits

B2B contract with an hourly rate of 130 - 170 PLN net

Hybrid work model: 3 days per week on site

Private medical care

Life insurance

Multisport card