R
Radiant

Principal SDET

United Kingdom

Testing · SRE

WHAT YOU'LL DO

As a Principal SDET, you will help set the technical direction for testing and quality in one of our engineering teams. This is not traditional QA: you'll build the test infrastructure and developer experience that let the team ship quickly and safely.

You'll partner closely with software engineers, platform engineers, and SRE.

This is a hands-on technical leadership role, through architecture, code, and the standards other teams build on.

The teams

  • Infra
  • Network
  • Cloud
  • Observability
  • MLOps

KEY RESPONSIBILITIES

  • Set the test strategy and architecture for your team.
  • Build test frameworks for APIs, services, and end-to-end flows.
  • Build test environments that reflect real GPU and cluster behaviour.
  • Integrate testing into CI/CD so it's fast and reliable.
  • Make testing easy for every engineer, and raise the quality bar across teams.

YOUR PROFILE

  • Extensive software engineering experience, focused on testing and quality infrastructure.
  • A track record of technical leadership at staff or principal level, including setting direction across multiple teams and delivering complex, high-stakes systems.
  • Strong hands-on engineering skills in Go.
  • Experience testing gRPC and REST APIs and distributed systems.
  • Experience building end-to-end test frameworks and test environments.
  • Excellent written and verbal communication, including clear design documents and explaining complex trade-offs to technical and non-technical audiences.

WHAT YOU BRING

  • Developer experience: Think in fast feedback for engi
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