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 several Senior Java Engineers 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

We are looking for multiple engineers with 8+ years of experience in Java development, including some of the following profiles:

Profile 1:

• Strong Java fundamentals, versatile engineer

• Spring, ORM understanding

• Nice to have: Oracle RDBMS, distributed systems, financial systems, payments

• Degree in Computer Science strongly preferred

Profile 2:

• Strong Java fundamentals, versatile engineer

• Spring, ORM understanding, Kafka, Kubernetes

• Experience migrating monolith systems

• Nice to have: distributed systems, financial systems, payments, fraud

• Degree in Computer Science strongly preferred

Profile 3:

• Deep expertise in Apache Spark and Java

• Hands-on experience with Kafka, AWS, Kubernetes

• Knowledge in Change Data Capture (CDC) and Databricks is a plus

• Degree in Computer Science strongly preferred

Profile 4:

• Enterprise development experience with Python and Java

• Expert in Kubernetes, microservices, AWS, and banking protocols (SWIFT, EBICS, SFTP)

• Proven architect of large-scale financial systems

• Outstanding leadership, mentoring, and communication skills

• Strategic thinker with strong stakeholder management abilities

• Degree in Computer Science

Conditions

• Location: Remote from Poland

• Contract type: B2B

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

• Salary: 180-220 PLN/h

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

Recruitment steps

• Call with a KUBO recruiter

• Interview with the client (online, 75-90 minutes)

• Offer & onboarding