Java Developer (Kotlin)

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.  

Responsabilities: 

• 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. 

Must-haves: 

• 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. 

Nice-to-Have: 

• Java development experience is a plus.` 

• Hands-on experience with Quarkus or willingness to learn it.  

  
  

Reasons why this job would be interesting to you: 

• Andersen cooperates with such businesses as Samsung, Reuter Gruppe, T-Systems, TUI, Ryanair, Johnson & Johnson, etc. This project is just your beginning here – working with us means reliability and prospects. 

• We have been strengthening our expertise since 2007. During this time, we have formed an excellent BA & SA team with streamlined processes, which now consists of more than 200 qualified analysts. 

• We welcome specialists from every part of the world. 

• Salaries at Andersen are pegged to the USD, and our employees are provided with a benefit package and an extensive set of bonuses. 

• We give our employees an opportunity to attend and participate in the company’s BA meetups, as well as offer a compensation program for international professional certificates. 

• There are many different ways to grow and develop at our company. You can improve as a tech specialist or a resource manager, and all your activities will be decently rewarded. 

• You will have an opportunity to take on the role of a mentor and help a group of BA/SA beginners grow. 

• Our employees have access to Andersen Knowledge Base, where they can take courses in a variety of areas: the art of negotiation, PreSale & Discovery, Agile essentials, product ownership, microservice architecture, API design, SQL, AWS, GDPR, UX/UI, people management, and more. 

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Join us!