Sr. Data Scientist, Retrieval & Agentic Systems

Department: Engineering

Employment Type: Full Time

Location: London

Compensation: £95,000 - £120,000 / year

Location: London, UK

Annual Remuneration
: £105,000 - £120,000 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 Senior Data Scientist, Retrieval & Agentic Systems based in London.

• Own and advance content discovery in Corestream, improving how customers find, explore, and engage with relevant risk intelligence, while helping shape the technical direction of discovery capabilities across Kharon's products.
• Redesigning and improving Kharon's hybrid search capabilities, opening new avenues for content discovery — drawing on modern approaches including BM25 tuning, semantic distance, RAG, reranking, and graph-based signals that go beyond traditional semantic similarity.
• Explore and build new discovery experiences, including agentic search, intelligent content categorization, personalized feeds, and systems that surface relevant connections across large collections of intelligence.
• 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.
• Own problems end to end, from identifying opportunities and evaluating approaches to prototyping, implementing, deploying, and continuously improving production systems.
• Collaborate closely with Product, Data Science, and Engineering, influencing priorities and architectural decisions while maintaining a strong hands‑on contribution.

• A proven interest or experience in global security, financial crimes, sanctions, export controls, or related domains
• 3+ years of experience in Data Science, AI Engineering, ML Engineering, or related software engineering roles
• Hands‑on experience in information retrieval, including experience with some combination of lexical search, embeddings, vector search, hybrid retrieval, ranking, reranking, and retrieval evaluation
• Practical experience building LLM‑powered applications, RAG pipelines, or agentic workflows.
• Strong Python skills and the software engineering ability to take an idea from prototype to a reliable, maintainable production implementation
• Demonstrated initiative and technical ownership — a track record of tackling ambiguous problems independently, challenging assumptions, and driving solutions forward while working with stakeholders
• Curiosity and a willingness to experiment with emerging approaches while maintaining a pragmatic focus on what actually works
• Bonus:
  Experience with graph‑aware search or integrating knowledge graph outputs into retrieval systems

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…