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AI Testing & Validation Engineer LLM Systems

Job in Greater London, London, Greater London, W1B, England, UK
Listing for: Reply
Full Time position
Listed on 2026-10-17
Job specializations:
  • Software Development
    AI Engineer (Applied/Software), AI QA / Validation Engineer, AI Reliability/ Performance Engineer, Python
Salary/Wage Range or Industry Benchmark: 65000 - 90000 GBP Yearly GBP 65000.00 90000.00 YEAR
Job Description & How to Apply Below

Reply seeks a mid/senior-level AI Testing & Engineering Specialist to design and implement Python-based testing frameworks for AI agents and LLM-based systems. You will shape evaluation pipelines, data-driven testing, and observability layers while collaborating with AI engineers, data teams, and QA to ensure reliable scalable testing in production.

You should have 2–5+ years in software/AI engineering, strong Python skills, and familiarity with NLP/LLM concepts and CI/CD practices.

We would love to welcome a new AI Testing & Validation Engineer for LLM Systems to our group in Greater London, England, United Kingdom.

We are seeking a motivated AI Testing & Validation Engineer for LLM Systems to join Reply in Greater London, England, United Kingdom.

Consider building your career as a AI Testing & Validation Engineer for LLM Systems at Reply.

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