AI Evaluation QA Engineer - Scale ML Testing & Metrics

Appnovation; Greater London; On-site; GBP 60,000 - 90,000; Full time

Job summary

Appnovation in London is seeking a QA / AI Evaluation Engineer to join a forward-leaning team that validates platform improvements through large-scale evaluations. You will measure factual grounding and accuracy lift while building reusable metrics to show progress over time.

The role requires 4+ years in QA for data/ML systems, strong Python skills, and experience with LLM evaluation frameworks. Collaboration with engineers to reproduce fixes is essential.

Qualifications

• 4+ years in QA / test engineering with exposure to data/ML systems.
• Strong Python and data-science techniques for measuring factual grounding and answer quality.
• Experience with LLM evaluation frameworks and statistical analysis.
• Ability to build automated, large-scale eval harnesses plus lighter human-in-the-loop A/B tests.
• Comfort working across multiple LLM providers’ outputs.
• Test automation frameworks and scripting.
• Detail-oriented, with strong analytical and communication skills.

Responsibilities

• Run evals at scale across large question sets, from small human-UAT batches up to hundreds of thousands or millions of automated evaluations.
• Statistically measure factual grounding and accuracy lift (before/after), not just human A/B testing.
• Build a metrics framework showing quality improvement (e.g., “answer is X% supported by source content / Y% better”).
• Design load and quality tests as the corpus scales.
• Define and maintain test plans, test cases, and quality gates.
• Automate regression and evaluation suites; integrate them into CI/CD.
• Report quality metrics clearly to technical and non-technical stakeholders.
• Collaborate with engineering to reproduce, triage, and verify fixes.
• Continuously improve QA processes and coverage.

Skills

Python

Data science techniques

LLM evaluation frameworks

Statistical analysis

Scripting

CI/CD

Test automation

Communication skills

Education

Bachelor’s Degree in a technical field

Tools

Python tooling

CI/CD pipelines

Job description

Appnovation in London is seeking a QA / AI Evaluation Engineer to join a forward-leaning team that validates platform improvements through large-scale evaluations. You will measure factual grounding and accuracy lift while building reusable metrics to show progress over time.

The role requires 4+ years in QA for data/ML systems, strong Python skills, and experience with LLM evaluation frameworks. Collaboration with engineers to reproduce fixes is essential.