Search & AI Retrieval Lead

🕒 March 26

🇬🇧 United Kingdom – Remote

⏰ Full Time

🟠 Senior

🤖 Artificial Intelligence

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proSapient

WebsiteLinkedInAll Job Openings

201 - 500 employees

💰 $10M Series A on 2021-01

proSapient provides a comprehensive primary research and expert networking service to institutional investors, consultants and corporate clients around the world. Our advantage is the speed and accuracy we deliver actionable intelligence and relevant experts to our customers, giving them the edge they need to achieve their commercial ambitions. This is made possible by our technology which is driven by artificial intelligence, separating us from other providers of market information.

📋 Description

• Define how structured data, semantic understanding, and intelligent systems come together to power discovery across our platform. • Evaluate and define the future search stack (technology selection is part of the role). • Design a scalable, cloud-native search architecture from first principles. • Decide between and combine approaches such as keyword search, vector search, hybrid retrieval, and graph-based retrieval. • 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 (OpenAI, Gemini). • Develop modern recommendation systems leveraging structured + unstructured data. • Architect retrieval pipelines on Google Cloud Platform (GCP). • 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!