Founding AI Engineer

Harnham; City Of London; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

A high-growth AI/FinTech startup in London is seeking a Lead AI Engineer to build a predictive intelligence platform for financial institutions. You will work closely with the CTO to design advanced LLM and RAG systems while owning the architecture and integration into scalable production workflows. The ideal candidate will have strong Python skills and experience in developing AI components. This role offers a hybrid working model in Central London and presents an exciting opportunity to define the product from the ground up.

Qualifications

• Experience leading end-to-end delivery of LLM / RAG / agentic systems.
• Strong knowledge of Python and cloud technologies.
• Ability to design and integrate AI workflows into production.

Responsibilities

• Design and deploy RAG pipelines, agentic workflows and LLM-based intelligence modules.
• Build Python-based AI components, APIs, and microservices.
• Own evaluation frameworks, observability, guardrails, and model governance.

Skills

Python

LLM systems

RAG systems

agentic systems

Tools

Cloud technologies

Vector stores

Job description

Do you want to build a predictive AI platform that surfaces opportunities before clients even know they exist?

Have you led end-to-end delivery of LLM / RAG / agentic systems in production?

Ready to become the technical owner of an intelligence engine at an early-stage startup?

A high-growth AI / FinTech startup is building a predictive intelligence platform for financial institutions. Their system connects external market events, client risks and revenue opportunities through real-time agentic AI. Backed by senior ex-consulting and enterprise technology leaders, they’ve already built a functioning MVP and are now hiring their first in-house Lead AI Engineer to take ownership of the core intelligence layer.

You’ll work directly with the CTO, shaping the architecture, roadmap and long-term AI strategy. This role suits a builder who wants ownership, deep technical scope and the chance to define the product from the ground up.

The Lead AI Engineer will architect and productionise advanced LLM / RAG systems, design agentic workflows, own evaluations and guardrails, and integrate AI modules into a scalable enterprise-grade platform. You’ll collaborate with domain experts from corporate and investment banking, helping turn market foresight into actionable intelligence.

Key responsibilities

• Design and deploy RAG pipelines, agentic workflows and LLM-based intelligence modules
• Build Python-based AI components, APIs and microservices
• Own evaluation frameworks, observability, guardrails and model governance
• Integrate AI systems into production environments and enterprise workflows
• Work closely with the CTO and guide junior / external engineers
• Translate financial-services use cases into practical AI features

Key details

• Working model : Hybrid (3 days / week, Central London)
• Tech : Python, LLMs, RAG, agentic systems, vector stores, cloud
• Visa : Cannot sponsor

Interested? Please apply below.