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.

Scope of responsibilities

• 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

Requirements

• 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

Conditions

• 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

Recruitment steps

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

2. Technical verification call with the client

3. Interview with the client

4. Final feedback and decision