Principal SDET

Radiant

. Set the test strategy and architecture for the engineering team .

Posted 11/11/2026full-timeRemote • United KingdomLeadWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates extensive software engineering experience with a focus on testing and quality infrastructure, alongside strong hands-on engineering skills in Go. Capable of providing technical leadership and driving capabilities from design through production and continuous improvement.

Highest-signal resume keywords

Software Engineering ExperienceTechnical LeadershipHands-On Engineering Skills in GoExperience Testing gRPC and REST APIsBuilding End-to-End Test Frameworks

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

Testing StrategyTest Framework DevelopmentAPI TestingEnd-to-End TestingQuality InfrastructureCI/CD IntegrationDistributed Systems TestingDesign DocumentationTechnical ArchitectureContinuous Improvement

Soft Skills

Excellent CommunicationCollaboration with EngineersAbility to Explain Complex Trade-Offs

Tools & Technologies

Cloud PlatformsCompute PlatformsNetworking TechnologiesStorage SolutionsGPU Environments

Industry Keywords

Quality StandardsTechnical LeadershipHigh-Stakes SystemsTesting EnvironmentsEngineering Standards

Tech Stack

Tools & technologies

CloudDistributed SystemsGRPCGo

About the role

Key responsibilities & impact

Set the test strategy and architecture for the engineering team
Build test frameworks for APIs, services, and end-to-end flows
Build test environments reflecting real GPU and cluster behaviour
Integrate testing into CI/CD for fast and reliable execution
Improve developer experience by making testing easy for engineers
Raise quality standards across teams
Partner with software engineers, platform engineers, and SRE
Provide hands-on technical leadership through architecture, code, and engineering standards
Drive capabilities from design through production, operation, and continuous improvement

Requirements

What you’ll need

Extensive software engineering experience focused on testing and quality infrastructure
Technical leadership at staff or principal level
Experience 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
Ability to create clear design documents and explain complex trade-offs to technical and non-technical audiences
Ability to work with compute, networking, storage, and cloud platforms
Right to work in the United Kingdom without sponsorship is addressed in the application requirements

Benefits

Comp & perks

25 days of annual leave
Learning Time dedicated to new skills, projects, or interests
Private medical insurance via Bupa
Cycle to Work Scheme
Gympass subscription to gyms and wellbeing apps
Participation in the company shares program
Enhanced parental pay & leave
Open, welcoming work culture
Regular feedback and growth-oriented culture