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

DCG Poland; Poland; On-site; PLN 50,000 - 80,000; Full time

Benefits offered by this job

Private medical care

Co-financing for the sports card

Constant support of dedicated consultant

Job summary

DCG Poland is seeking a skilled developer to design and maintain Java-based applications for taxation and investment management in Poland. The role involves leading upgrades to Java 17+ and Spring Boot 3.x, working through the full software development lifecycle, and collaborating with stakeholders for technical solutions.

Strong knowledge of Java frameworks and experience with relational databases are required. You will also benefit from perks such as private medical care and sports card co-financing.

Qualifications

• 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, preferably PostgreSQL.
• Experience working with messaging technologies such as JMS or MQ.

Responsibilities

• Design, develop, and maintain Java-based applications for taxation and account management.
• Lead application upgrades to Java 17+ and Spring Boot 3.x.
• Build and maintain calculation engines aligned with tax regulations.
• Participate in the full software development lifecycle from design to deployment.

Skills

Java

Spring Boot

SQL

API specifications

Git

Job description

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