About the role
Be the technical lead in front of Quillstone's banking and PSP customers for our LLM products in disputes, KYC and reconciliation. You will run discovery, build proofs of concept on customer data, design the solution and hand over something their engineers can run, and explain model limits clearly to risk committees.
Benefits & perks
Health Insurance
Private medical insurance (Bupa) for you and dependants.
Equity
Meaningful stock options, 4-year vest with 1-year cliff.
Flexible Work
Hybrid: 2 days a week in the Shoreditch office.
Paid Time Off
30 days holiday plus bank holidays.
Parental Leave
26 weeks fully paid parental leave.
Wellness / Stipend
£100 monthly wellness stipend.
- 01Lead technical discovery with bank and PSP operations and engineering teams.
- 02Build proofs of concept on customer data using our LLM and retrieval stack.
- 03Write solution designs and support customer model-risk reviews.
- 04Create evaluation sets that become customer acceptance tests.
- 05Bring customer requirements back to the product and platform teams.
What we evaluate against.
Applied Technical Depth
Must have
- Has built an LLM-based proof of concept or product feature on real customer data.
Nice to have
- Comfortable with structured outputs and tool calling.
Problem Decomposition
Must have
- Has converted a vague customer ask into a scoped POC with acceptance criteria.
Nice to have
- Writes solution design documents.
Customer & Domain Discovery
Must have
- Has shadowed operational users and changed the solution as a result.
Nice to have
- Payments, banking or disputes domain experience.
Product & Solution Judgment
Must have
- Has scoped out or down an automation because of reliability or regulatory risk.
- Has explained model limitations to a risk or compliance audience.
Nice to have
- Built an evaluation set used as an acceptance test.
Execution Under Ambiguity
Must have
- Has taken a customer from discovery to pilot or production.
Nice to have
- Handled multiple concurrent customer engagements.
Team Structure
AI platform squad of 8 engineers working alongside disputes and reconciliation product teams.
Operating Rhythm
Two-week sprints, weekly customer calls, monthly model-risk review.
Communication
Written-first; design docs precede every customer POC.
Conflict Resolution
Disagreements settled on evaluation data, escalated to the CTO only on regulatory risk.
Ownership
Squads own their product metrics and their on-call.
Innovation
A tenth of every sprint is reserved for experiments.
Feedback
Written feedback cycles every six weeks.
Diversity & Inclusion
Structured interviews and published salary bands.
First 30 days
Shadow two live customer engagements and ship a POC improvement.
90 days
Take that customer through model-risk review to a signed pilot.
Outcomes
Be the go-to engineer for our largest banking accounts.