pSmartCore in Barcelona leads fintech payments infrastructure and seeks a senior backend engineer to evolve its core platform. You design microservices in Java/Kotlin, optimize high-load components, and drive fault tolerance, scalability, and security with Spring Boot, PostgreSQL, and distributed systems patterns. /ppYou will integrate with banks and payment systems, and work with Kafka, RabbitMQ, and Redis. You will mentor peers, participate in RD, write tests, and own code quality in a /p #J-18808-Ljbffr