Load Test Engineer

Cyrex, a Magic Media company, is a media and tech start-up powered by creativity and innovation. We work with leading developers and publishers in the games industry, providing support and solutions designed around individual needs and carried out by global experts. 

For more than a decade, Cyrex has secured and stress-tested the products of some of the world’s most demanding technology companies, from global entertainment platforms to regulated financial and healthcare infrastructure. We’re a small team, but we’ve built a client list and track record that go well beyond our size.

Load testing is one of the things we’re best known for.

Studios and platform teams come to us ahead of a launch, major release, or marketing push, the point where years of work suddenly meets a very large number of simultaneous users, with no opportunity for a second attempt. Our job is to simulate that moment before it happens, find what breaks, understand why, and work alongside the customer to fix it.

We do this using a load-testing platform we built ourselves. It’s mature, proven, and already in production. Part of your role will be keeping it that way: maintenance, bug fixes, dependency and infrastructure upgrades, and targeted improvements when an engagement requires them.

The platform spans a Go backend, two React frontends, and AWS infrastructure capable of spinning up enough load generation to put serious systems under real strain.

Platform maintenance isn’t a full-time job, though, and we won’t pretend it is. The larger part of this role is the load testing itself.

That starts with test engineering: designing scenarios that accurately model how real users behave and implementing them in Python against whatever protocols the customer’s system happens to use.

It also means working directly with customers. Our load testing is expert-led; we don’t hand over a dashboard and disappear. We work through iterations with the customer’s engineering team: agree on what we’re trying to prove, build the scenario, run the test, analyse the results together, identify the bottleneck, make changes, and go again.

You’ll be part of those sessions and, as you grow into the role, expected to lead them.

That combination is why we’re looking for someone with range rather than a narrow specialist. This role sits somewhere between software engineering, performance engineering, systems analysis, and technical delivery, and you need to be comfortable moving between all four.

Who we’re looking for

We’re looking for an engineer who is genuinely comfortable moving across a stack and equally comfortable working directly with a customer.

You write strong Python. It’s the language of our test scenarios and much of the tooling around them, so it’s where you’ll spend most of your development time. But you’re not attached to staying in one language: keeping the platform healthy means being willing to work in Go, TypeScript, Terraform, and AWS as the situation demands.