AI Data Scientist - Early-stage Start-up - FinTech - London

Oliver Bernard; England; On-site; GBP 60,000 - 90,000; Full time

Benefits offered by this job

Unlimited holiday

Equity

London-based hybrid work

Job summary

Oliver Bernard is seeking an AI/Data Science engineer to join an early-stage FinTech in London. You will own the extraction and matching layer, handling highly unstructured financial data, and shape how AI is built and deployed from day one.

The role requires 3+ years shipping ML/AI systems, strong Python, and hands-on experience with LLMs in production. This is a small, high-trust team offering ownership, equity, and 3–4 days a week in London.

Qualifications

• 3+ years shipping applied ML/AI systems into production.
• Strong Python.
• Hands-on experience with LLMs in production.
• Background in FinTech, LegalTech, Insurance or another highly regulated environment.
• Comfortable operating with ambiguity and creating structure.
• Production engineering mindset; this isn't a research role.

Responsibilities

• Own the extraction and matching layer for unstructured financial data.
• Develop confidence scoring and threshold calibration.
• Work within an AI-native architecture to influence product direction.
• Collaborate in a small, high-trust team with significant ownership.

Skills

Python

LLMs in production

Production mindset

FinTech/regulatory experience

Job description

AI / Data Science | Early-Stage FinTech | London | Up to £90k + Equity

Oliver Bernard have recently partnered with an early-stage London FinTech currently securing their pre-seed funding round, and they’re looking for an AI/Data Science hire to join right at the start of their growth journey.

This is a chance to join a small, high-trust team where you’ll have genuine ownership over how AI is built and deployed.

What you’ll be working on

You’ll own the extraction and matching layer, working with highly unstructured financial data.

You’ll be tackling problems around:

• Confidence scoring & threshold calibration

They’re AI-native by design, viewing LLMs as infrastructure rather than a feature bolted onto an existing product.

What they’re looking for

• 3+ years shipping applied ML/AI systems into production
• Strong Python
• Hands-on experience with LLMs in production
• Background in FinTech, LegalTech, Insurance or another highly regulated environment
• Comfortable operating with ambiguity and creating structure
• Production engineering mindset, this isn't a research or analytics role

What's on offer

Up to £90k + meaningful equity

3–4 days a week in London

Unlimited holiday

Small team / high trust / significant ownership

Opportunity to join at the beginning of the growth journey

If you're an applied ML/AI engineer who wants to have a real say in the product, architecture and direction of an AI-native FinTech, this could be a very interesting one.