Data Scientist, Retrieval & Agentic Systems

Kharon; Greater London; Hybrid; GBP 90,000 - 105,000; Full time

Benefits offered by this job

Fully-sponsored private health

Pension plan with 3% employer

Annual leave plus bank holidays

Job summary

Kharon, based in London, is seeking a Senior AI Engineer, Agentic Systems, to own Corestream development, advance semantic search capabilities, and deliver graph-informed retrieval. You will collaborate with Product and Engineering to evolve risk intelligence and narrative generation for customers.

The role emphasizes ownership, hands-on engineering, and the creation of meaningful search experiences using BM25, vector search, RAG, and graph-aware approaches. Hybrid work in London is offered.

Qualifications

• 3+ years of experience in a Data Science or AI Engineering role
• Hands-on experience with semantic search including BM25, vector search, reranking, and retrieval evaluation
• Experience with RAG pipelines and agentic systems in production
• Proficiency in Python and SQL
• Strong product alignment—able to read a roadmap, own tickets, and drive initiatives independently
• Bonus: Experience with graph-aware search or integrating knowledge graph outputs into retrieval systems

Responsibilities

• Owning and evolving Corestream, Kharon's risk intelligence feed across entity-level insights and narrative-based risks
• Redesigning semantic search capabilities and applying BM25 tuning, semantic distance, RAG, and reranking
• Integrating risk analysis outputs into the search layer to surface meaningful insights
• Leading the narrative generation pipeline that turns graph and analytics into written intelligence
• Partnering with Product and Engineering to own the Corestream roadmap and push it forward
• Tweaking and optimizing metrics defining search quality and narrative relevance

Skills

Data Science

AI Engineering

Semantic search

BM25

Vector search

RAG

Python

SQL

Product alignment

Graph-aware search

Tools

Python

SQL

BM25

Job description

Department

Engineering

Location

London

Compensation

£90,000 - £105,000 / year

Description

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.

Responsibilities

• 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

Qualifications

• 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

About Kharon

Kharon operates at the nexus of global security and is on a mission to revolutionize the current landscape. We take complex data as it relates to global security and empower our clients to not only understand the risk associated with their potential business relationships but to operationalize that data so that they can make the best and most informed decisions possible.

From financial crimes and sanctions to export controls and threat identifications, our tools optimize protection against the types of risks that could otherwise be incredibly dangerous and excessively costly to any business. Serving many of today’s leading global financial and multinational institutions, Kharon products are the most powerful in the space with a precision and depth that is absolutely unparalleled.

When you look at any major global crisis event, we're providing intelligence that's at the heart of those circumstances. We connect the dots in a way that's meaningful. As the world continues to evolve in complexity, so too does the demand for our products. Given the significance of our work and the increasing global reliance on our insights, we are looking for a Senior AI Engineer, Agentic Systems to join us as we work to shape the way businesses perceive and navigate global risks.

Company Benefits

• Fully-sponsored private health insurance
• Pension plan with 3% employer contribution
• Annual leave plus bank holidays

DISCLOSURES

Kharon is committed to cultivating and maintaining a workplace that is free from harassment and discrimination. All qualified applicants will receive consideration for employment without regard to race, religion, color, national origin, ethnicity, gender, gender identity or expression, sexual orientation or identity, neurodiversity, appearances, age, protected veteran status, or status as a qualified individual with disability.

We are committed to making reasonable adjustments to support disabled applicants and employees. If you require any adjustment to participate in the recruitment process, please contact [e-mail].

You must have the right to work in the UK. Kharon is unable to offer visa sponsorship for this role.

UNITED KINGDOM Candidate Privacy Notice

Kharon is committed to protecting your personal data in accordance with the UK General Data Protection Regulation (UK GDPR) and the Data Protection Act 2018. We collect the personal data you submit as part of your application - including your name, contact details, employment history, and qualifications - to assess your suitability for the role. Our lawful basis for processing is legitimate interests (Article 6(1)(f) UK GDPR).

If your application is unsuccessful, your data will be retained for up to 12 months before being securely deleted. If you accept a role, your data will transfer to your employee record.

You have the right to access, correct, or request deletion of your data, to object to or restrict its processing, and to lodge a complaint with the UK data protection authority, the ICO, at www.ico.org.uk. To exercise your rights, contact us at [e-mail].