Senior AI Model Tester

Company: Mastek
Apply for the Senior AI Model Tester
Location: Reading
Job Description:

We are looking for a Senior AI Model Tester to drive the quality, reliability, and performance of AI/ML systems across critical business use cases.

  • Lead AI model quality assurance, evaluation, and benchmarking strategy
  • Design frameworks to evaluate accuracy, drift, bias, and performance under stress
  • Define and track AI KPIs (precision, recall, LLM evaluation metrics)
  • Build automated validation pipelines across lower environments and path-to-live
  • Identify and mitigate bias, rogue outputs, and model disparities
  • Establish data quality standards for fair AI outcomes
  • Implement MLOps practices within CI/CD pipelines
  • Collaborate closely with engineering and DevOps teams

Required Experience

  • 5+ years in QA / Software Engineering / Automation Testing
  • 2–3 years specifically in AI/ML model testing
  • Strong expertise in Python / Java and statistical analysis
  • Deep understanding of AI/ML lifecycle and evaluation frameworks
  • Experience with tools like LangSmith, Fiddler, InspectAI, OpenAI Evals
  • Strong SQL skills and experience with large-scale or unstructured datasets / vector DBs
  • Bachelor’s or Master’s in Data Science, Computer Science, Statistics, or related field
  • Work on cutting-edge AI systems in real-world deployments
  • Influence model governance, fairness, and performance standards
  • Collaborate with high-impact engineering and AI teams

If you’re passionate about ensuring AI systems are accurate, fair, and production-ready, we’d love to hear from you.

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Posted: July 9th, 2026