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Senior ML Engineer at Sacher AI. We are a passionate team of technical experts, clinicians and behavioural scientists, delivering high-quality research-backed AI solutions and consultancy. . Founded by Dr Paul Sacher, our team is focused on creating the next generation of AI solutions and services.  We deliver real impact through the expert application of behavioural science.  . Currently in growth mode, we expect to expand quickly – we are looking for people that will grow with us..! .  . The Role : Senior ML Enginee. r. Develop cutting edge behavioural science solutions using ML, LLM and associated technologies. . Fractional role, 2 days per week (16 hours) initially.   . Future opportunities for full time roles and performance bonuses. . Key Responsibilities.  . Ownership of the full technical stack  . Rapid, high-quality development of web and mobile Apps and services . Integrations with partner and customers platforms . Contribute to AI assistant prompt development work (led by our clinical experts) .  . Technologies / Experience . Python, Tensorflow, PyTorch, Keras, et al. . LLM for AI assistants: OpenAI, Anthropic, AWS Bedrock, Azure, etc. . RAG optimisation . Database optimisation for ML at scale . Strong skills in MLOps practices, including experience with  . CI/CD pipelines  . containerisation . model versioning . monitoring tools . automated testing frameworks for ML systems .  . Qualifications & Experience . Essential . At least 7 years experience as a developer / engineer / data scientist . At least 5 years direct experience with AI . At least 2 years experience developing and maintaining LLM solutions in production . Referenceable experience optimising RAG and AI solutions in production . Referenceable experience of full stack deployments .  Also of interest . Prior experience with behavioural science and healthcare experience will be of interest. . Company Location: United Kingdom.