Software Engineer, Test & Build Engineering

Job Description What We DoWe design, develop, deploy, and support real-time trading systems. We care deeply about system reliability, testability, recoverability, fault tolerance, throughput, and latency. We measure times in microseconds, sometimes even nanoseconds. Our engineers have a strong understanding of computer science fundamentals and software engineering. We are analytical thinkers. We are always learning our craft. If it's broken, we fix it.

If it needs refactoring, we refactor it. If it's hard to test, we make it testable. We like statistics. We love automation. We are pragmatic. We ship code weekly. We're looking for like-minded individuals to join us.

About the Role This is a unique hybrid engineering role for someone who combines deep expertise in test automation with a passion for build engineering and continuous delivery. Based in London, you will sit at the intersection of two critical disciplines — ensuring the quality of Cboe Europe's trading infrastructure through world-class automated testing, while simultaneously serving as a local engineering resource for our global builds and release process.

Cboe Europe operates three equities exchanges, one trade reporting facility, and a platform for systematic internalize rs. The quality and reliability of these platforms is non-negotiable. You will be a key guardian of that standard.

Equally important, you will bring vision and leadership to our build engineering practice. You'll work closely with our builds team in the US to understand and support the existing release process, while proactively identifying opportunities to modernise it — leveraging current industry best practices to move us towards a faster, more reliable, and more automated delivery pipeline. This is not simply a role for someone who executes;

it's a role for someone who can see what "good" looks like, build consensus across teams and time zones, and drive meaningful, lasting change.

What You'll Be Responsible For Test Automation (Primary Focus)
Designing, developing, and maintaining automated tests, frameworks, and test infrastructure using object-oriented programming principles and production-quality code Extending and improving our proprietary Python-based test automation framework

Analysing complex technical and financial business requirements to design comprehensive test scenarios that realistically represent real-world trading activity

Creating detailed test documentation and test plans for new features

Identifying, documenting, and tracking defects; verifying fixes resolve issues completely

Performing root cause analysis on test failures and system issues

Supporting and maintaining test environments, ensuring they remain stable and consistently "green"Contributing to and improving continuous integration pipelines

Participating in code reviews, design discussions, and agile ceremonies

Working closely with software development, business, and trade desk teams across Cboe's global organisation

Build & Release Engineering (Secondary Focus)
Serving as the London-based point of contact for build and release activities, partnering with the US builds team to support our weekly release process across trading platforms

Providing oversight for build and test environments, ensuring stability and consistency

Contributing to the development and maintenance of CI/CD pipelines and status dashboards

Identifying and championing improvements to our build and release processes, with a clear vision for modernisation aligned to current industry standards

Gathering requirements, building consensus across engineering stakeholders, and designing and delivering a roadmap to evolve our build engineering practice

Developing and maintaining scripts and tooling to support build, test, and…