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RAG Specialist Senior Data Scientist

Company: LexisNexis

Location: toronto, London

Posted: May 26, 2026

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Position Details

Join LexisNexis as a Senior Data Scientist focused on Retrieval-Augmented Generation (RAG) and Python expertise. Drive innovative AI solutions and collaborate within a dynamic team remotely.
The Sr DS II position requires advanced knowledge of AI and strong experience with RAG models. You will utilize Python for model testing, optimization, and development while conducting research on the latest AI and machine learning advancements. Your contributions will enhance existing systems and maximize performance and scalability.
Key Responsibilities:
• Test and implement AI models with a focus on RAG
• Engineer and test prompts for optimal outcomes
• Collaborate with cross-functional teams on AI integration
• Optimize RAG models to improve performance and cost
• Document AI models, processes, and workflows
Requirements:
• Proven experience in a Senior Data Scientist role
• Strong proficiency in Python programming
• Knowledge of RAG models and prompt engineerin...