Senior SDET – Cloud-Native AI API Testing (Go/Kubernetes)

Radiant is seeking a Senior SDET to join our core product team in London. You will design and build high-performance, cloud-native back-end systems and scalable APIs to support AI workloads, including LLMs and GPU-based services.

You’ll create automated test frameworks in Go, drive API, integration and performance testing, and ensure reliability across Kubernetes deployments. You’ll collaborate with platform, backend and ML engineers, mentor juniors, and raise the bar for quality throughout the