Senior Java Backend Engineer – Spring Boot, PostgreSQL

Diverse CG Sp. z o.o. Sp.k.; Poland; Remote; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Private medical care

Co-financing for sports card

Dedicated consultant support

Job summary

DCG is seeking an experienced Java developer to design, develop, and maintain Java applications supporting savings and investment products. You will build and enhance calculation engines to ensure tax compliance across multiple countries and develop solutions for complex business processes, tax authority integrations, and customer-facing reporting.

In this role you will participate in requirements analysis, design, development, testing, and deployment, mentor other developers, review code, and

Qualifications

• Strong experience in Java 21 and Java-based application development.
• Hands-on experience with Spring Boot and related Java frameworks.
• Proven experience with relational databases and PostgreSQL SQL.
• Practical experience with messaging technologies such as JMS, MQ, or similar protocols.
• Strong proficiency in Java frameworks including Spring and Hibernate.
• Knowledge of OpenAPI and AsyncAPI for producing and consuming data.
• Familiarity with Git and CI/CD pipelines.
• Understanding of software design patterns and OOP principles.
• Ability to collaborate with cross-functional stakeholders.
• Strong analytical and problem-solving skills.
• Very good command of English, both spoken and written.

Responsibilities

• Design, develop, and maintain Java applications supporting savings and investment products.
• Build and enhance calculation engines ensuring tax compliance across multiple countries.
• Develop solutions supporting complex business processes, tax authority integrations, and customer-facing reporting.
• Participate in requirements analysis, solution design, development, testing, and deployment.
• Collaborate with financial analysts to translate business requirements into technical solutions.
• Mentor developers and act as a code reviewer and design sparring partner.
• Promote practical engineering practices across the development team.
• Use AI-assisted development and automation responsibly to improve productivity, quality, and learning.
• Contribute strong collaboration and analytical skills to solve complex technical challenges.

Skills

Java 21

Spring Boot

Hibernate

OpenAPI

AsyncAPI

Git

CI/CD pipelines

Design patterns

OOP

English (fluent)

Tools

PostgreSQL

JMS/MQ

Job description

DCG is seeking an experienced Java developer to design, develop, and maintain Java applications supporting savings and investment products. You will build and enhance calculation engines to ensure tax compliance across multiple countries and develop solutions for complex business processes, tax authority integrations, and customer-facing reporting.

In this role you will participate in requirements analysis, design, development, testing, and deployment, mentor other developers, review code, and