Data Scientist, Retrieval & Agentic Systems
Hybrid London Full-time Mid-level Data Science
At a glance
Mid-level Data Science role at Kharon. London · full-time · £90,000–£105,000 base.
SalaryStated by Kharon
£90,000 – £105,000
Base salary for this role, in GBP per year, as published in the posting.
This role, from KharonOur estimate for the market: £62,250–£94,375Median £80,000
Above the market median of £80,000 for mid-level data science roles in London.
Worked out from 6 postings that stated pay, median £80,000. Last updated Oct 23, 2026.
RoleData Science
SeniorityMid-level
LocationLondon
WorkplaceHybrid
EmploymentFull-time
Base pay£90,000–£105,000
PostedAug 3, 2026 · 2mo ago
Role brief
dataroles summary, based on the employer's posting.
What you'll do
- Evolve Corestream, improving its risk intelligence feed of entity insights and topic-based narratives for customers
- Rework semantic search using BM25 tuning, semantic distance, retrieval-augmented generation and reranking
- Bring graph-based risk analysis into search results and sub-network exploration
- Advance the narrative pipeline that turns graph and analytical data into accurate customer intelligence
- Work with Product and Engineering on the Corestream roadmap, search-quality measures and narrative relevance
What you bring
- At least three years in data science or AI engineering
- Practical semantic search experience, including BM25, vector retrieval, reranking and retrieval evaluation
- Production experience with retrieval-augmented generation pipelines and agentic systems
- Strong Python and SQL skills, plus the ability to drive roadmap work independently
Who this fits
This role suits a mid-level data scientist or AI engineer with an interest in global security, financial crime, sanctions, export controls or related areas. You'll work in a hybrid setup in London, with three days per week on-site.
From the employer
Location: London, UK Annual Remuneration: £90,000 - £105,000 and discretionary annual bonus Pay Frequency: Monthly Probationary Period: 180 days Work Arrangement: Hybrid, 3-days per week
TL;DR Kharon is seeking a full-time Data Scientist, Retrieval & Agentic Systems based in London.
TL;DR Kharon is seeking a full-time Data Scientist, Retrieval & Agentic Systems based in London.
- Owning and evolving Corestream, Kharon's risk intelligence feed — a dynamic platform that surfaces entity-level insights and topic-based risk narratives to customers
- Redesigning and improving Kharon's semantic search capabilities, opening new avenues for content discovery — drawing on modern approaches including BM25 tuning, semantic distance, RAG, and reranking
- Integrating Kharon's risk analysis outputs into the search layer, ensuring that graph-based insights surface meaningfully within search results and sub-network exploration
- Driving the evolution of Kharon's narrative generation pipeline — how we take graph and analytical data and transform it into compelling, accurate written intelligence for customers
- Partnering with Product and Engineering to take ownership of the Corestream roadmap and push it to its next stage
- Tweaking and optimizing the metrics that define search quality and narrative relevance
- A proven interest or experience in global security, financial crimes, sanctions, export controls, or related domains
- 3+ years of experience in a Data Science or AI Engineering role
- Hands-on experience with semantic search — including familiarity with BM25, vector search, reranking, and retrieval evaluation
- Experience with RAG pipelines and working with agentic systems in production
- Proficiency in Python and SQL
- Strong product alignment — able to read a roadmap, take ownership of tickets, and drive initiatives forward independently
- Bonus: Experience with graph-aware search or integrating knowledge graph outputs into retrieval systems
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