Senior Java Developer Jobs (No ghost jobs, direct from employers)

Avenga is an international engineering firm helping businesses operate with AI at the core. With 6,000+ experts worldwide, we combine engineering expertise with AI-native thinking to turn ambitious ideas into real-world impact across industries, technologies, and markets.

At the core of the role

We are looking for a Senior Java Backend Developer to join a long-term project in the Polish banking sector.

You will develop and maintain backend systems supporting bank accounts, banking products and customer self-service processes. Working with Java 21-25 and Spring Boot 3, you will contribute to microservices built using hexagonal architecture, with a strong focus on code quality, accuracy and performance.

Please note that this is a hybrid role. We expect on average 1 day per week from the office, with the following locations available: Warsaw, Łódź, Gdańsk, Wrocław, Poznań, Kraków, Lublin and Szczecin.

Core skills you'll bring

• Strong commercial Java experience, including hands-on work with Java 21 or newer

• Strong knowledge of Spring and Spring Boot 3, including Spring MVC, Spring Data JPA and Spring Security

• Experience with Hibernate / JPA

• Good knowledge of SQL and relational databases such as Oracle, PostgreSQL or MS SQL Server

• Experience designing and developing REST APIs

• Practical experience with Kafka-based asynchronous communication

• Experience designing and developing microservices

• Understanding and practical application of hexagonal architecture

• Hands-on experience with Docker and Kubernetes

• Experience with Git, Maven or Gradle, CI/CD and automated deployments

• Experience writing unit and integration tests and participating in code reviews

• Ability to diagnose application issues and optimize performance

• Understanding of application security, scalability and high availability

• Polish at B2+ level or higher, sufficient for daily collaboration with a Polish-speaking team

Nice-to-have

• Experience in banking, financial services or transactional systems

• Knowledge of payment processes

• Experience with SonarQube, Nexus or Artifactory

• Familiarity with Gerrit

The impact you'll create

• Develop and maintain Java backend services supporting bank accounts, banking products and customer self-service processes

• Design and evolve REST APIs and microservices using hexagonal architecture

• Build synchronous and asynchronous integrations, including Kafka-based communication

• Improve application performance, reliability and scalability while maintaining accuracy in business-critical processes

• Write and maintain unit and integration tests

• Participate in code reviews and technical discussions, with a strong focus on clean, maintainable and secure code

• Analyse logs, troubleshoot issues and improve existing solutions

• Work closely with business analysts, QA engineers, frontend developers and Product Owners to translate requirements into working software

• Contribute to CI/CD and automated deployments in a containerized environment

People are at the core of Avenga. We provide equal opportunities regardless of race, ethnicity, gender identity, sexual orientation, disability, age, religion, or any other characteristic. We are committed to a respectful environment where everyone can be themselves, share their ideas, and feel that they belong.

Location Poland Remote status Hybrid Technology Java Seniority Senior-level

Take the first step toward your career at Avenga

APPLICATION

Send your CV to tell us about your core skills and what you're looking for next.

TALENT CALL

Meet our Talent team to talk about your goals and experience while exploring our culture and the way we work.

TECHNICAL INTERVIEW

We'll explore your experience, strengths, and approach to work to see what we can build together.

CUSTOMER INTERVIEW

For some roles, you'll meet our customers to understand the outcomes your expertise can help create.

WELCOME TO AVENGA

An offer is just the beginning. We welcome you to put your expertise into action and shape what's next together.