Senior Java Developer Java, Spring Boot, Postgres SQL Warsaw, Gdańsk, Gdynia

Responsibilities

• Design, develop, and maintain Java-based applications supporting taxation, account management, and investment processing
• Lead and execute application upgrades to Java 17+ and Spring Boot 3.x baseline
• Build and maintain calculation engines aligned with tax regulations across multiple countries
• Develop solutions supporting complex business processes, including integrations with tax authorities and generation of customer-facing reports
• Participate in the full software development lifecycle (SDLC), including: requirements analysis, design, development, testing and deployment
• Collaborate with financial analysts and business stakeholders to translate requirements into technical solutions

Requirements

• Experience with Java and Spring Boot upgrades, including migration projects
• Strong knowledge of: Java (preferably Java 21) and Spring Boot
• Experience with relational databases and SQL (e.g. PostgreSQL)
• Experience working with messaging technologies (e.g. JMS, MQ)
• Strong proficiency in Java frameworks (e.g. Spring, Hibernate)
• Experience working with API specifications such as OpenAPI and AsyncAPI
• Familiarity with version control systems (Git) and CI/CD pipelines
• Understanding of object‑oriented programming principles and software design patterns

Offer

• Private medical care
• Co‑financing for the sports card
• Constant support of dedicated consultant