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# Kotlin/Java Backend Engineer - Fintech Payments

- **Company:** Smartcore Ag
- **Location:** Barcelona, Spain
- **Salary:** €90,000.0 - €150,000.0
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, Java (Programming Language), Fault Tolerance, Java Virtual Machine (JVM), PostgreSQL, MongoDB, RabbitMQ, Spring-boot, Kotlin, Apache Kafka, Microservices
- **Published:** August 9, 2026
- **Apply:** https://www.jobleads.com/es/job/e4249b988c9e65c4bd3bba72015ff1ceb

## About the Role

The role requires deep JVM, Spring Boot expertise, and strong problem-solving skills. You will mentor peers, participate in R&D and ensure high-quality code with tests, while collaborating

## Description

SmartCore AG is building a scalable core acquiring platform for a fast-growing fintech. You will design and implement microservices in Kotlin/Java, focusing on high performance, fault tolerance, and security. You will work with Kafka/RabbitMQ, PostgreSQL, MongoDB, and modern containers in a distributed team.


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