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.

• 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

• 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)

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

Initial phone call with a recruiter (20–30 min.)

Technical verification call with the client

Interview with the client

Final feedback and decision

W KUBO naprawdę zależy nam na ludziach. Zapraszamy osoby w różnym wieku, o różnych tożsamościach
i sposobach funkcjonowania oraz niezależnie od sytuacji zdrowotnej i rodzinnej. Autentyczność jest dla nas wartością, a naszym celem jest uczciwy i otwarty proces dla wszystkich.

At KUBO, we genuinely care about people. We welcome candidates of all ages, backgrounds, identities, family constellations, health situations, and ways of thinking and interacting with the world. You’re welcome to be yourself — we value authenticity, and we’re committed to creating a fair and inclusive process for everyone.