Cluj-napoca, Romania Hybrid Full-time

JUSTROCKET is hiring a Java Backend Developer (Midlevel) for Banking API (m/f/d)

About the Role

What You'll Do

Design and implement new features for a high-performance Banking API that enables secure financial data aggregation and payment processing. Develop robust backend components aligned with user requirements and system architecture. Write comprehensive unit and integration tests to ensure system stability and reliability.

Participate in code reviews to maintain strong coding standards and contribute to continuous improvement. Monitor backend service health by actively managing alerting systems and ensuring high availability. Expand connectivity with European bank APIs to improve coverage and responsiveness across diverse customer use cases.

Work closely with Product Management, Support, and engineering teams to deliver solutions that meet both technical and business needs. Help shape system evolution through proactive input on architecture and functionality.

Requirements

  • Proven experience or strong interest in Java/Kotlin, Spring Boot, and Hibernate
  • Familiarity with MySQL or PostgreSQL databases and containerization using Docker
  • Solid grasp of RESTful service design and development tools such as IntelliJ and JUnit
  • Commitment to writing clean, testable code with attention to performance and maintainability
  • Problem-solving mindset with a practical approach to technical challenges
  • Fluency in English is required for cross-team collaboration

Preferred Qualifications

  • Background in financial technology, especially with PSD2 (XS2A), FinTS, or HBCI protocols
  • Hands-on experience with Kubernetes, Git, Maven, or Gradle, and CI/CD pipelines (e.g., Jenkins)
  • Knowledge of OpenAPI, Liquibase, and AWS cloud infrastructure
  • Experience using JIRA and Confluence for project tracking and documentation
  • Familiarity with monitoring and alerting tools
  • Exposure to AWS services in production environments

Benefits

  • Supportive onboarding with team integration and ongoing guidance
  • Flexible hybrid work model with remote options
  • Private health insurance and 7card membership
  • Weekly team lunches and regular offsite events, including retreats
  • Central office in a collaborative workspace with garden, BBQ area, and communal spaces
  • Open culture where feedback and new ideas are actively encouraged
  • Opportunities to influence both product direction and team practices
Required Skills
JavaKotlinSpring BootHibernateREST APIsMySQLPostgreSQLDockerSQLJUnitIntelliJJavaScriptMicroservicesTest CoveragePerformance Optimization JavaKotlinSpring BootHibernateREST APIsMySQLPostgreSQLDockerSQLJUnitIntelliJJavaScriptMicroservicesTest CoveragePerformance Optimization
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About company
JUSTROCKET

JUSTROCKET was founded in 2016 by a Romanian tech-addict and two German entrepreneurs, who came together to build digital products that transform businesses and industries on an international level.

Over the past years, we have built several tech teams for international customers in a close partnership, working on scalable infrastructures and products, transforming outdated technologies and processes – celebrating great successes with the platforms created.

All we do is build on the most important success factor in the digital world: people.

We combine this principle with our many years of experience and a unique JUSTROCKET ecosystem. This creates professional and efficient product teams that, equipped with the right toolset and a scalable infrastructure, make the difference.

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Job Details
Department Software Development
Category backend
Posted 22 days ago