Sesen AI

SESEN.AI is a specialist AI consultancy founded by Dr Berkan Sesen (DPhil, Artificial Intelligence, University of Oxford). We help organisations design, build, and deploy AI systems that deliver measurable commercial value, with deep domain expertise in financial services and healthcare.

Before founding SESEN.AI, Berkan spent 15+ years in senior roles at UBS (Head of Algorithmic Execution & AI), JP Morgan Asset Management (Senior Quantitative Portfolio Manager), and Citigroup (Algorithmic Trading Quant). He built ML-powered investment products managing over $2B in assets, developed patent-pending NLP systems, and led AI platform development across equities and fixed income.

Our services include AI strategy and roadmapping, ML/NLP system design and build, LLM and RAG pipeline development, agentic system architecture, algorithmic trading and quantitative modelling, technical due diligence, and fractional AI leadership.

Clients range from venture-backed startups building their first AI product to established financial institutions modernising their analytical capabilities. Every engagement is principal-led: Berkan works directly on the project, supported by specialist associates when additional capacity is needed.

Awards include the UKABIF Innovation Award, Banking Technology Awards UK, American Financial Technology Awards, and the Citigroup Global Progress Award. Published in the Journal of the Royal Society Interface, PLOS ONE, and Wiley Finance.

London-based. Available for advisory, project-based, and retainer engagements.