Job Description

🌍 About the Company

The company is an established FinTech software provider with more than 19 years of experience developing technology for banks and regulated financial institutions.

Its international engineering teams build secure and scalable platforms supporting payments, banking operations, financial integrations, and backoffice processes across multiple markets. Reliability, auditability, data protection, and operational resilience are central to the systems being developed.

💼 About the Role

As a Senior Java Backend Engineer, you will take end-to-end ownership of backend services supporting payments, banking operations, integrations, and internal backoffice systems.

You will work independently with business and technical requirements, design practical solutions, and deliver production-ready features with minimal supervision. The role involves close collaboration with product owners, QA engineers, DevOps specialists, architects, compliance professionals, and other engineering teams.

This position is suited to an experienced engineer who can identify risks, clarify incomplete requirements, make sound technical decisions, and remain responsible for solutions after their production release.

The role is fully onsite from the Vilnius office.

🔍 Responsibilities

• Design, develop, test, deploy, and support backend services using Java and Spring Boot.
• Take end-to-end ownership of assigned features, from technical analysis and solution design to production release and ongoing support.
• Build secure, scalable, and maintainable REST APIs for banking, payments, integrations, and internal backoffice systems.
• Develop services within microservice, distributed, messaging, and event-driven architectures.
• Integrate internal and external systems through REST APIs, message brokers, files, queues, and database-driven workflows.
• Work with PostgreSQL and other relational databases, including data modelling, query optimisation, transactions, locking, and performance analysis.
• Write clean, readable, and testable code supported by unit, integration, and API tests.
• Participate in technical design discussions and propose practical, maintainable solutions.
• Investigate production incidents through log analysis, debugging, data validation, and observability tools.
• Improve existing systems through refactoring, simplification, stronger abstractions, documentation, and better observability.
• Work with Docker, Kubernetes, CI/CD pipelines, and cloud-ready environments.
• Build systems with security, auditability, data protection, regulatory compliance, and operational resilience in mind.

🎓 Requirements

• Strong professional experience as a Senior Java Engineer, Backend Engineer, or in a comparable backend development role.
• Advanced hands-on experience with Java and Spring Boot.
• Good knowledge of the Spring ecosystem, including Spring Web, Spring Data, Spring Security, validation, configuration, transactions, and testing.
• Experience designing, building, and maintaining REST APIs and backend integrations.
• Solid understanding of microservices, distributed systems, messaging, and production-grade backend development.
• Strong SQL and relational database knowledge, preferably with PostgreSQL.
• Ability to optimise queries and work with indexes, transactions, locking, and database performance.
• Practical experience with Kafka, RabbitMQ, or comparable messaging technologies.
• Experience with Docker, Kubernetes, and CI/CD pipelines.
• Experience with automated testing tools such as JUnit, Mockito, Testcontainers, MockMvc, or similar.
• Strong debugging, troubleshooting, and problem-solving skills.
• Ability to work independently, clarify requirements, identify risks, and explain technical trade-offs clearly.
• Fluent written and spoken English.

Additional experience that would be valuable

• Experience in FinTech, banking, payments, e-money, compliance, or another regulated environment.
• Knowledge of AWS services such as EKS, MSK, S3, RDS, Redis, or similar cloud technologies.
• Experience with Keycloak, OAuth 2.0, OpenID Connect, JWT, authentication, authorisation, or MFA workflows.
• Familiarity with audit logs, CDC, Debezium, Kafka Streams, reporting systems, or data warehouse integrations.
• Experience with Grafana, Prometheus, CloudWatch, OpenSearch, distributed tracing, or similar observability tools.
• Understanding of DORA, GDPR, information security, and operational resilience requirements.
• Experience mentoring engineers or improving development practices across a team.

🤝 Key Competencies

• Ownership: Ability to move business and technical problems forward without waiting for every detail to be defined.
• Critical thinking: Identifying unclear requirements, edge cases, dependencies, and potential risks before implementation.
• Practical decision-making: Proposing maintainable technical solutions and explaining their advantages and trade-offs.
• Structured delivery: Breaking complex work into smaller, testable, and production-ready deliverables.
• Maintainability mindset: Writing code and documentation that other engineers can understand, operate, and extend.
• Accountability: Supporting released features and implementing long-term solutions rather than temporary fixes.
• Collaboration: Communicating effectively with engineering, product, operations, and compliance stakeholders.

✨ The Employer Offers

• Work on real FinTech, payments, banking, integration, and backoffice systems.
• Complex technical challenges involving backend architecture, data, security, and platform reliability.
• Real technical ownership rather than responsibility limited to individual development tickets.
• Collaboration with experienced engineers, architects, product owners, QA, DevOps, and compliance teams.
• A stable full-time position in an international engineering environment.
• Competitive compensation with an annual performance review and performance-based bonus system.
• Additional private health insurance after six months.
• 21 annual vacation days and free parking at the Vilnius office.
• International collaboration and opportunities to visit colleagues in other locations.
• Career development towards Lead Engineer, Software Architect, or Technical Product Owner responsibilities.

Ready to take ownership of backend systems supporting modern banking and payments? Apply now.