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Salary
≈ $37k – $100k per year (Estimated)
Location
In office (Madrid)
Seniority
Middle · 3+ years exp

Confirmed on the employer's own hiring board on Sep 28, 2026. First seen by Alion on Sep 4, 2026.

Overview
Company
Impact
Profile match

SIX

SIX connects financial markets with infrastructure, data and services powering the future of finance. Explore our products and services.

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.

Backend Developer (C)

Madrid|Working from home up to 40%| Reference8113

You enjoy working with internal and external interfaces and are good at working in IT systems/applications? Our goal is to develop, maintain, and give support to IT applications in the connectivity applications for Post Trading area. To achieve that, a high-level knowledge of the application landscape, dependencies and integration is very important.

What You Will Do

  • Act as a support technician within a Development Support team
  • Develop and maintain application code across the full development lifecycle and assure the right service
  • Understand the SIX processes and apply them properly
  • Acquire the required knowledge about the applications to which we provide support
  • Collaborate with different IT teams to ensure optimal support to the requestors
  • Contribute with ideas or initiatives to enhance the team service

What You Bring

  • Linux systems administration knowledge
  • 3 years of hands-on experience in C programming and shell scripting
  • Additional programming skills in languages such as Python, Java, or similar are highly valued.
  • DB technology understanding (MSSQL, Postgre, etc.)
  • Microservices and containerization knowledge
  • Background in IT corporate tools (Jira/Confluence, GIT, VS Code, etc.)
  • Experience and knowledge of CI/CD (GitLab, Artifactory, Ansible, Grafana, Elastic, etc)
  • High team-working spirit
  • Languages: Spanish (native/proficiency) and fluent in English (verbal and written)

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

For this vacancy we only accept direct applications.

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

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