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Senior data scientist

London
JSS Search
Data scientist
Posted: 9h ago
Offer description

Job Description

Senior AI / Data Science Specialist

Hybrid – 3 days onsite | £80,000 + benefits

Overview

A major customer-focused organisation is expanding its AI capabilities and is building out two key streams:

* Traditional ML/Data Science
* A new and rapidly growing AI function

This role sits within the AI stream, operating alongside one existing AI specialist but at a slightly more senior and strategic level. You will help shape the organisation’s LLM strategy, conversational AI capabilities, and broader applied AI roadmap.

Key Responsibilities

* Design, build, and enhance LLM-driven tools, including RAG pipelines, embeddings, and prompt engineering.
* Support and expand the organisation’s chatbot capabilities.
* Work with unscripted data (text, call transcripts) to define key insights and model outputs.
* Lead and contribute to the development of evaluation frameworks to measure AI and LLM performance.
* Operate between AI engineering, ML engineering, and data science teams, helping define and influence wider AI strategy.
* Collaborate with product, technical, and commercial stakeholders to deliver high-impact AI solutions.

Tech Environment

* Python
* LangChain / Langfuse (open to other modern AI frameworks)
* Azure & Databricks
* Experience deploying AI/ML models into production
* Understanding of microservices architectures
* Strong MLOps practices
* Experience with conversational AI tools is a plus

About You

* 5+ years of experience across AI, machine learning, and data science
* Proven ability to build POCs and move quickly in an applied AI environment
* Broad exposure across LLMs, model deployment, and DS methodologies
* Strong communication skills with the ability to work with non-technical and senior stakeholders
* Comfortable operating in a hybrid model (3 days onsite)
* Experience in customer-focused or high-volume data environments is advantageous

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