Senior Java Engineer

Are you ready to design reliable backend systems and solve real-world problems in financial software?

At KUBO, we’re looking for a Senior Java Engineer to join a long-term backend transformation project for one of our clients in the financial sector. You'll work in a product-focused environment where clean code, data integrity, and system reliability really matter.

As a consultant, you’ll collaborate with an international Agile team, fully remote from Poland, and contribute to the architecture and development of services that power complex financial workflows.

Key responsibilities

• Design and implement scalable, maintainable backend systems using Java and Spring

• Analyze, refactor, and improve legacy code with a focus on performance and reliability

• Collaborate with architects, developers, and product owners to ensure technical excellence

• Apply patterns such as Outbox and Change Data Capture to improve consistency and communication between services

• Deliver high-quality code backed by strong fundamentals and modern testing practices

• Share knowledge and support engineering best practices across the team

Ideal candidate profile

• 8+ years of experience in Java development (Java 11+), with a strong command of Spring

• Deep understanding of Object-Relational Mapping (ORM) principles

• Solid software engineering foundation: clean code, design patterns, modular architecture

• Degree in Computer Science or similar technical field (strongly preferred)

• Nice to have:

  • Experience with Oracle RDBMS

  • Exposure to distributed systems or event-driven architectures

  • Familiarity with financial systems or payments

  • Knowledge of the Outbox Pattern and CDC (Change Data Capture)

Conditions

• Location: Remote from Poland

• Contract type: B2B

• Duration: Until end of 2026 (with possible extension)

• Salary: Negotiable, depending on experience

• Benefits: Private medical care, life insurance, Multisport card, training budget

Recruitment steps

• Call with a KUBO recruiter

• Interview with the client

• Offer & onboarding

At KUBO, we genuinely care about people. We welcome candidates of all ages, backgrounds, identities, family constellations, health situations, and ways of thinking and interacting with the world. You’re welcome to be yourself — we value authenticity, and we’re committed to creating a fair and inclusive process for everyone.