Python Senior EngineerOur client, a leading global supplier for IT services, requires Python Senior Engineer to be based at their client''s office in London, UK.This is a hybrid role - you can work remotely in the UK and attend the London office 2 days per week.This is a 12 month temporary contract to start ASAPDay rate: Competitive Market rateKey ResponsibilitiesBuilding and evolving AI-powered services using PythonDesigning and implementing evaluation frameworks for LLM-based systemsImproving output quality through structured evals rather than purely code changesApplying techniques such as LLM-as-a-Judge to assess response and recommendation qualityWorking with non-deterministic systems and iterating based on real-world behaviourIntegrating AI services into a broader platform and API ecosystemContributing to production readiness including reliability, observability, and performancePartnering with data scientists on prompts, model usage, and evaluation strategiesKey RequirementsEssential Skills:Strong Python engineering experience in production environmentsExperience building AI-enabled applications, particularly in recommendation or conversational systemsHands-on experience with evaluation frameworks for LLM or AI systemsClear understanding of how AI systems differ from traditional deterministic systemsAbility to design meaningful evals and improve system quality over timeExperience working in cross-functional teams with engineering, data, and productDesirable ..... full job details .....