Principal Test Engineer – AI Core Services (Azure / .Net)
Location: Cambridge, UK (Hybrid) | Contract
Simon James IT are hiring a Principal Test Engineer to lead the validation of cloud-native AI services and APIs built on Microsoft Azure and .NET. You’ll design automated testing frameworks and AI-specific evaluation tools to ensure reliability, security, and ethical compliance.
Responsibilities
* Lead functional, performance, and security testing of Azure‑based services
* Build automated test suites for APIs, service components, and AI pipelines
* Develop tools to assess AI outputs for accuracy, consistency, and safety
* Define quality metrics and observability with engineering and data science teams
* Ensure compliance with NIST AI RMF, EU AI Act, and ethical AI standards
* Conduct threat modelling and validate exposed APIs
* Mentor junior testers and drive innovation
Qualifications
* Strong background in automated testing and QA leadership
* Deep understanding of AI systems and regulatory compliance
Required Skills
* Testing: API validation, performance profiling, OWASP security testing
* Agile collaboration across global R&D teams
* Experience with advanced AI testing methodologies
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