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Salary
≈ $53k – $113k per year (Estimated)
Location
In office (Las Rozas de Madrid)
Seniority
Senior

Confirmed on the employer's own hiring board on Oct 22, 2026. First seen by Alion on Sep 24, 2026.

Overview
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Impact
Profile match

SIX

SIX is a Swiss financial market infrastructure group headquartered in Zurich that operates stock exchanges, securities settlement and custody, banking and payment services and financial information. Formed in 2008 from the merger of Swiss financial companies and owned by banks, it runs the SIX Swiss Exchange and, since acquiring BME, the Spanish stock exchanges in Madrid, with further offices in London, Warsaw, Frankfurt and Stockholm. It hires Java and full-stack developers, test and platform engineers, product and project managers, business analysts, controllers, internal auditors and interns in Madrid, Zurich and Warsaw.
Backed by team@irregular

BME - Bolsas y Mercados Españoles - drives the transformation of financial markets and belongs to SIX, the third largest exchange group in Europe.

What sets us apart drives us ahead: between local roots and global relevance, we are a unique blend of tradition and future, of foundation and growth. We value bright minds and inspire them to grow with their ideas. Come and shape the future of finance with us.

Senior Software Engineer

Madrid|Working from home up to 40%| Reference8248

Do you want to work in a highly dynamic environment and build reliable, scalable backend systems? Are you passionate about Java, distributed systems, and event-driven architectures? Then our Backend Engineering Team wants to hear from you.

We are an agile and collaborative team responsible for designing and operating core backend services that power our platform in the Post Trading area of the SIX Swiss Exchange. Our goal is to build & maintain robust, scalable, and maintainable systems that support critical business processes.

In this position, you will work closely with software engineers, architects, and product teams to design, maintain and deliver high-quality backend solutions.

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
  • Experience with Wildfly/JBOSS is a big plus
  • Experience designing RESTful APIs and working with SQL databases

If you have any questions, check out our FAQ page or call Yuliya Stoykoat +34 917095993.

For this vacancy we only accept direct applications in english.

Diversity is important to us. Therefore, we are looking to receiving applications regardless of any personal background.

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