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Senior LLM Evaluation Engineer - Code & AI Systems

Job in Greater London, London, Greater London, W1B, England, UK
Listing for: Braintrust
Full Time position
Listed on 2026-08-04
Job specializations:
  • Software Development
    AI QA / Validation Engineer, Software Testing
Salary/Wage Range or Industry Benchmark: 90000 - 150000 GBP Yearly GBP 90000.00 150000.00 YEAR
Job Description & How to Apply Below
Location: Greater London

Braintrust is seeking an experienced software engineer to join our evaluation and annotation team. The role focuses on real-world software engineering, model evaluation, and applied AI to improve model reliability, reasoning, and code quality.

You will design challenging coding tasks, evaluate model outputs against benchmarks, and contribute to reinforcement learning and model improvement workflows. This is a contracting engagement with potential for long-term collaboration.

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Position Requirements
10+ Years work experience
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