Java Developer (Kotlin)

Summary

Andersen is hiring a Java developer (Kotlin) in the EU for a fintech project focused on enhancing a cloud-based digital banking platform to boost scalability, performance, and integration.

The customer is a fast-growing European fintech company providing a cloud-native platform that enables banks to build modern, customer-focused digital experiences. Combining ready-made modules with full customization, it helps financial institutions launch solutions faster and more efficiently. Backed by major investors and recognized with industry awards, the company supports hundreds of banks worldwide in accelerating their digital transformation.

The project is focused on developing a cloud-based digital banking platform that enables financial institutions to launch and scale modern web and mobile banking solutions. The current phase aims to enhance the platform’s scalability, performance, reliability, and integration capabilities.

Responsibilities

• Development and maintenance of backend services using Kotlin
• Design and development of integrations between internal systems and external banking/fintech services
• Design and integration of RESTful APIs and microservices
• Implementation and maintenance of integration workflows using tools like Apache Camel and Temporal.
• Working with cloud infrastructure (AWS / GCP): deployment, configuration, CI/CD
• Participation in architectural decisions to ensure security and scalability
• Optimization of backend system performance and reliability
• Collaboration with frontend, DevOps, and QA teams throughout the entire SDLC
• Monitoring and troubleshooting integrations, ensuring data consistency and reliability.

Requirements

• Commercial experience as a Kotlin developer from 3+ years.
• Solid knowledge of Spring Boot, REST API, JSON, and HTTP.
• Experience with integration frameworks and messaging systems (e.g., Apache Camel, Apache Kafka).
• Experience in building microservices architecture.
• Proficiency in working with SQL and NoSQL databases (PostgreSQL, MongoDB, etc.).
• Hands-on experience with Elasticsearch and Redis.
• Experience with orchestration or workflow engines (e.g., Temporal).
• Strong understanding of CI/CD processes and tools (GitHub Actions, Jenkins, GitLab CI).
• Experience with cloud platforms (AWS, GCP), including deployment, service configuration, and monitoring.
• Good understanding of application security principles (OAuth2, JWT, HTTPS, encryption).
• Ability to write unit and integration tests; experience with JUnit, Mockito, and Testcontainers.
• Experience in fintech, payment, or banking projects.
• Practical knowledge of Docker and Kubernetes.
• Understanding of event-driven architecture (Kafka, Pub/Sub, etc.).
• Experience working in Agile or Scrum teams.
• Level of English – from Intermediate and above.

Desired skills

• Java development experience is a plus.`
• Hands-on experience with Quarkus or willingness to learn it.

Reasons to join us

• Experience in teamwork with leaders in FinTech, Healthcare, Retail, Telecom, and others. Andersen cooperates with such businesses as Samsung, Siemens, Johnson & Johnson, BNP Paribas, Ryanair, Mercedes, TUI, Verivox, Allianz, T-Systems, etc..
• The opportunity to change the project and/or develop expertise in an interesting business domain.
• Job conditions – you can work both fully remotely and from the office or can choose a hybrid variant.
• Guarantee of professional, financial, and career growth! The company has introduced systems of mentoring and adaptation for each new employee.
• The opportunity to earn up to an additional 1,000 USD per month, depending on the level of expertise, which will be included in the annual bonus, by participating in the company's activities.
• Access to the corporate training portal, where the entire knowledge base of the company is collected and which is constantly updated.
• Bright corporate life (parties / pizza days / PlayStation / fruits / coffee / snacks / movies).
• Certification compensation (AWS, PMP, etc).
• Referral program.
• English courses.
• Private health insurance and compensation for sports activities.

Join us!