Search & AI Retrieval Lead

🕒 March 26

🇬🇧 United Kingdom – Remote

⏰ Full Time

🟠 Senior

🤖 Artificial Intelligence

🇬🇧 UK Skilled Worker Visa Sponsor

This company has sponsored UK Skilled Worker visas in the past.

👻 Ghost score 55%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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proSapient

WebsiteLinkedInAll Job Openings

201 - 500 employees

🤖 Artificial Intelligence

💼 Consulting

💰 $10M Series A on 2021-01

Artificial Intelligence • Consulting

proSapient is a comprehensive primary research and expert networking service that connects institutional investors, consultants, and corporate clients with industry professionals globally. By leveraging advanced technology driven by artificial intelligence, proSapient delivers actionable intelligence and relevant expert connections quickly and accurately, providing clients with a significant advantage in achieving their commercial goals.

📋 Description

• Evaluate and define the future search stack, including technology selection. • Design a scalable, cloud-native search architecture from first principles. • Decide between and combine keyword search, vector search, hybrid retrieval, graph-based retrieval, and LLM re-ranking. • Design indexing, data modeling, and ranking strategies. • Define measurable relevance and quality frameworks. • Design and implement a Knowledge Graph architecture modelling entities and relationships. • Define graph schema, linking strategies, and enrichment workflows. • Combine graph-based signals with semantic search and ranking models. • Build extraction pipelines on top of frontier models such as OpenAI and Gemini. • Develop recommendation systems leveraging structured and unstructured data. • Architect retrieval pipelines on Google Cloud Platform. • Design data pipelines and feature stores using BigQuery or alternative analytical systems. • Ensure scalability, observability, and cost efficiency. • Build production-grade systems, not experiments.

🎯 Requirements

• 5+ years building and scaling production search or retrieval systems. • Strong experience designing search architectures, not just operating them. • Experience evaluating and selecting search technologies. • Experience with semantic search and embeddings-based retrieval. • Experience building pipelines on top of frontier LLMs (OpenAI, Gemini). • Strong Python skills. • Experience leading technical initiatives in mid-sized teams. • Experience working with cloud-native systems (preferably GCP).

🏖️ Benefits

• Tenure Gifts - Vouchers, extra holiday and sabbaticals for each year of employment. • Health insurance through Vitality • Employee Assistance Programme - Access to a health and wellbeing service that offers personalised advice and support from specialist teams. • Enhanced Maternity & Paternity pay. • Annual Leave - 25 days + bank holidays which includes a week's closure over the Christmas period to fully reset. • MyMindPal app - Online support for mental fitness that helps people to stress less and enjoy life more • Corporate Events - From quarterly gatherings to our annual winter & Summer parties, we love to celebrate, collaborate and have fun together!