💼 Full-Time Position

Senior Backend Engineer

🏢
SIX
📍 Madrid, Community of Madrid, Spain
📍
Location
Madrid, Spain
📅
Posted
May 31, 2026
⏰
Type
Full-Time
🎯

Full-Time Opportunity: This is a permanent, full-time position with a competitive package and real career growth potential.

Job Description

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...