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 integral 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,

📌 Load Test Engineer (España)
🏢 Magic Media (Starloop Studios)
📍 España