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June 20, 2026

Senior Java Backend Developer – Financial Technology

Senior • Remote

18,900 - 23,100 PLN

Warsaw, Poland

Unleash innovation in financial technology — shape the future of transactional systems with expertise and precision! 100% remote work.

As a Senior Java Developer, you will be working on cutting-edge transactional and banking systems within the financial services industry. You will contribute to the development of robust, scalable solutions that power high-stakes online financial operations, driving digital transformation and operational excellence. This role offers a unique chance to advance your career within an innovative environment that values technical mastery and strategic thinking.

Quick Facts

  • 100% remote work
  • Financial services industry
  • High-impact transactional systems

Your main responsibilities

  • Design, develop, and optimize complex backend systems using Java 21+ and Spring Boot 3, adhering to best practices and high-quality standards.
  • Work with domain-driven design (DDD) to implement scalable and maintainable software solutions.
  • Manage and optimize data solutions utilizing PostgreSQL, Redis, and integration tools like RabbitMQ and Kafka.
  • Utilize tools such as ELK stack, Dynatrace, and CI/CD pipelines (GitLab, Jenkins, OpenShift) to ensure system performance and reliability.
  • Conduct thorough testing and validation using JUnit 5, Mockito, and RestAssured to deliver resilient software releases.
  • Collaborate with agile teams (Scrum, Kanban) for iterative development and continuous improvement.
  • Contribute analytical insights and high-level problem-solving skills to support transaction systems in a fast-paced financial environment.

Requirements

  • At least 5 years of experience in Java development, with a strong background in Spring Boot 3 and Java 21+.
  • Solid understanding of database technologies, particularly PostgreSQL.
  • Practical experience with CI/CD tools such as GitLab, Jenkins, and deployment on OpenShift.
  • Familiarity with message brokers like RabbitMQ and Kafka.
  • Knowledge of monitoring and logging tools (ELK stack, Dynatrace).
  • Experience with automated testing frameworks including JUnit 5, Mockito, and RestAssured.
  • Strong analytical skills and experience working within agile methodologies (Scrum, Kanban).
  • Good command of Polish and communicative English.
  • Legal right to work within the European Union.

Nice to have

  • Experience in the finance sector and knowledge of financial risk modeling.
  • Certifications related to cloud, database management, or software development.
  • Basic knowledge of R language and SQL testing.