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Senior Backend Engineer

Company

SIX

Location

Madrid, Community of Madrid

Posted

May 26, 2026

Position Overview

What You Will Do


  • Design, develop, and maintain backend services and REST APIs using Java, Spring, and Spring Boot

  • Build and operate event-driven services using Apache Kafka

  • Develop and maintain applications running on Java application servers such as WildFly

  • Collaborate with engineers and architects on system design, architecture, and technical improvements

  • Ensure reliability, scalability, and performance of production systems

    • What You Bring 

  • Very strong experience with Java backend development and modern backend design principles

  • Experience with Spring and Spring Boot for building microservices

  • Experience with Kafka or other messaging / event-streaming platforms

  • Knowledge of Wildfly/JBOSS is a big plus

  • Experience designing RESTful APIs and working with SQL databases

  • High english level, both writen and spoken, to interact with ou...

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