# Principal SDET at Radiant

- Company: Radiant
- Status: Open
- Workplace: On-site
- Location: United Kingdom
- Level: Principal
- Discipline: QA & testing
- Employment: Full-time
- Posted: 2026-11-09
- Skills: Testing, SRE
- Apply: https://jobs.ashbyhq.com/radiant/41895511-feb7-4a19-9255-8b4b0a99fa95

## Description

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

More Radiant roles: https://deviantjobs.com/companies/radiant