Senior Backend Java Engineer — Hybrid, Global Team, Training

Jit Team; Województwo pomorskie; Hybrid; PLN 185,000 - 240,000; Full time

Benefits offered by this job

Flexible work organization

Daily English in international teams

Training financed by Jit

Integration meetings

Job summary

Jit Team is seeking a Senior Backend Java Developer to join a Nordic-client backed initiative focused on pension and investment platforms. You will modernize existing systems, deliver scalable Java-based services, and collaborate with cross-functional teams in an international, English-speaking environment.

The role emphasizes Java 21, Spring Boot 3.3.x, PostgreSQL, and modern CI/CD workflows. Hybrid work from Gdynia/Gdańsk/Warszawa with office presence three days a week is expected.

Qualifications

• Several years of experience as a Senior Java Developer.
• Excellent knowledge of Java development and Spring Boot.
• Hands-on experience with modernization and migration projects.
• Practical experience with Java 21 and PostgreSQL.
• Familiarity with messaging (JMS, MQ) and API specs (OpenAPI/AsyncAPI).
• Experience with Git and CI/CD practices.
• Strong OO design and architectural skills.

Responsibilities

• Lead application modernization efforts, updating to Java 17+/Java 21 and Spring Boot 3.3.x.
• Design, develop, and maintain Java-based applications for savings and investment products.
• Build and enhance calculation engines ensuring tax compliance across multiple countries.
• Implement solutions for complex business processes, tax authorities integrations, and reporting.
• Participate in the full software development lifecycle from requirements to deployment.
• Collaborate with stakeholders to translate business needs into technical solutions.
• Contribute to system architecture discussions and continuous improvements.

Skills

Java

Spring Boot

Java 21

PostgreSQL

JMS

MQ

OpenAPI

AsyncAPI

Git

CI/CD

Tools

Hibernate

Job description

Jit Team is seeking a Senior Backend Java Developer to join a Nordic-client backed initiative focused on pension and investment platforms. You will modernize existing systems, deliver scalable Java-based services, and collaborate with cross-functional teams in an international, English-speaking environment.

The role emphasizes Java 21, Spring Boot 3.3.x, PostgreSQL, and modern CI/CD workflows. Hybrid work from Gdynia/Gdańsk/Warszawa with office presence three days a week is expected.