Backend Java Developer

Quick Facts

• Role: Backend Java Developer

• Focus: Java applications for taxation, account management, and investment processing in pension and savings products

• Work: Full SDLC (analysis, design, development, testing, deployment)

Description

Enhance and develop Java-based applications, with an emphasis on taxation, account management, and investment processing in pension and savings products. Upgrade applications to at least Java 17 and Spring Boot 3.3.x, and build robust calculation engines to ensure tax compliance across multiple countries. Collaborate with financial analysts to turn business requirements into technical solutions, including integrations with tax authorities and generation of customer-facing reports.

Responsibilities

• Upgrade applications to at least Java 17 and Spring Boot 3.3.x baseline

• Design, develop, and maintain Java applications for savings and investment products

• Build calculation engines for compliance with tax regulations across multiple countries

• Support complex business processes, integrate with tax authorities, and generate customer-facing reports

• Participate in the full software development lifecycle: requirements analysis, design, coding, testing, and deployment

• Collaborate with financial analysts to translate business requirements into technical solutions

Requirements

• Proficiency in Java and experience with Spring Boot, specifically in upgrade projects

• Experience with Java 21 and Spring Boot 3.3.x

• Strong knowledge of relational databases, particularly PostgreSQL

• Familiarity with messaging protocols such as JMS and MQ

• Extensive understanding of object-oriented programming principles and software design patterns

• Experience with Git and understanding of CI/CD pipelines

• Knowledge of OpenAPI and AsyncAPI for data management

Nice to Have

• Experience with complex business process development

• Strong analytical skills for financial problem-solving

Other Details

• Locations: Gdańsk, Gdynia, or Warsaw (Poland)

• Office presence: 3 days per week

• Rate: up to 155zł/h