Senior Data Scientist

Description: proSapient is seeking a Senior Data Scientist to enhance the expert knowledge graph and improve AI workflows. Responsibilities include entity resolution, taxonomy quality, and evaluating agentic AI workflows. Requirements: 5+ years of experience in applied data science or machine learning with production impact. Proficiency in Python, SQL, statistics, evaluation design, and uncertainty quantification. Hands-on experience with entity resolution, record linkage, or large-scale deduplication. Familiarity with knowledge graphs, taxonomies, embeddings, modern NLP, and LLM evaluation. Ability to assess when rules or classifiers are more effective than LLMs. Nice to have: Experience with graph databases (e.g., Neo4j, TigerGraph) and agent guardrails. Benefits: Tenure gifts including vouchers, extra holiday, and sabbaticals for each year of employment. Health insurance through Vitality and remote working flexibility for up to 20 days a year. Employee Assistance Programme for health and wellbeing support. Enhanced maternity and paternity pay, 25 days annual leave plus bank holidays. Access to the MyMindPal app for mental fitness support and corporate events.