Senior Full-Stack Product Engineer (£70K - £110K + Equity) at VC-backed AI fintech startup
£70k - £110k GBP
This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.
She will pick the best candidates from Jack's network
The next step is to speak to Jack.
Senior Full-Stack Product Engineer
Salary: £70K - £110K + Equity
Company Description: VC-backed AI fintech startup
Job Description:
Join an early-stage team revolutionizing financial crime intelligence using cutting-edge AI agents. You will build full-stack features, automate model testing, and iterate on document fraud detection systems. This role offers the chance to define AI strategy while working on products that significantly reduce operational costs for financial service providers globally.
Location: London, UK
Why this role is remarkable:
Significant ownership and influence over the AI strategy at an early-stage startup backed by top-tier VCs.
Opportunity to work with the latest advancements in LLMs, agents, and computer vision to solve real-world compliance challenges.
High-growth environment with bi-annual salary reviews, yearly performance equity refreshes, and flexible remote-work weeks.
What you will do:
Build and maintain full-stack features across front-end, back-end, and MLops using TypeScript, React, and Node.js.
Develop automated systems for prompt optimization, model fine-tuning, and performance evaluation based on human feedback.
Collaborate closely with product teams to translate customer compliance needs into scalable, reliable AI-driven solutions.
The ideal candidate:
4+ years of experience in full-stack product engineering with a strong intuition for user-facing features.
Hands-on expertise with AI/ML technologies including prompt engineering, vision models, and fine-tuning pre-trained models.
Proactive problem-solver with a focus on delivering high-quality code at speed within a mission-driven startup environment.
Who are Jack & Jill?
Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Next steps
Step 1. Visit our website.
Step 2. Click 'Talk to Jack'.
Step 3. Talk to Jack so he can understand your experience and ambitions.
Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.
Step 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction.
Step 6. If not, Jack will find you excellent alternatives. All for free.
We never post fake jobs
This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.
Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.
We appreciate this can make them look a bit suspect, but there isn't much we can do about it.
Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.