Senior System Engineer – 5413

Development, Full-time, London
The Role:

Our clients will rely on your infrastructure to help them move billions in foreign currencies every day.  Work with the brightest engineers at MarketFactory and amongst our bank, broker, and hedge fund clients. As a Senior System Engineer, you will be responsible all aspects of a highly available low-latency infrastructure, supporting both our external clients and our internal teams. You will help to maintain and improve our highly resilient infrastructure and build our next generation fully automated PaaS infrastructure.

Must Haves

  • Bachelor's degree in computer science or a related field
  • 4+ years managing, maintaining, and optimizing trading infrastructure.
  • Strong Linux system administration e.g., RedHat/Ubuntu.
  • Troubleshooting skills in large enterprise level, low-latency, 24/7 systems.
  • Experience using clusters e.g., Pacemaker.
  • Low latency networking experience e.g., SolarFlare, Arista.
  • Implemented monitoring and deployment tools e.g., Centreon/CheckMK/Puppet/Ansible
  • Used Python and shell scripting to automate your work.
  • Attention to detail in documentation of incidents, changes, project and overall system design and implementation to provide to clients and regulators.


  • Building/maintaining internal PaaS e.g., OpenShift.
  • Database administration and querying with PostgreSQL, MySQL.
  • Managed infrastructure with FX related clients and venues.
  • Managed networks with low-latency connectivity to futures venues (e.g. CME).
  • Ability to conduct ad hoc maintenance of network devices.
About Us

We’re a diverse group of visionary innovators who provide trading and workflow automation software, high-value analytics, and strategic consulting to corporations, central banks, financial institutions, and governments. More than 40% of the world’s largest companies use our solutions. Founded in 1999, we’ve achieved tremendous growth by bringing together some of the best and most successful financial technology companies in the world.
Over 2,000 of the world’s leading corporations, including 50% of the Fortune 500 and 30% of the world’s central banks, trust ION solutions to manage their cash, in-house banking, commodity supply chain, trading and risk.
Over 800 of the world’s leading banks and broker-dealers use our electronic trading platforms to operate the world’s financial market infrastructure.
With 10,000 employees and offices in more than 40 cities around the globe, ION is a rapidly expanding and dynamic group.
At ION, we offer careers that provide many opportunities: To invent. To design. To collaborate. To build. To transform businesses and empower people around the world to do more, faster and better than before. Imagine what you can do and experience. This is where you can do your best work.

ION is committed to maintaining a supportive and inclusive environment for people with diverse backgrounds and experiences. We respect the varied identities, abilities, cultures, and traditions of the individuals who comprise our organization and recognize the value that different backgrounds and points of view bring to our business.
ION adheres to an equal employment opportunity policy that prohibits discriminatory practices or harassment against applicants or employees based on any legally impermissible factor.

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