Full Stack Engineer (£70k-£110k + Equity) at Y Combinator-backed AI fintech startup

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Job Title

Full Stack Engineer (AI Agents)

Salary

£70k-£110k + Equity

Company Description

Y Combinator-backed fintech infrastructure startup automating AML operations

Job Description

Join a high-growth London team building autonomous AI agents that handle complex KYC/AML workflows for global financial institutions. You will scale a platform already serving publicly listed banks across the US, EU, and Japan, moving from product-market fit to rapid expansion while owning core infrastructure and critical API systems.

Location

London, UK

Why this role is remarkable

• Work directly with the founding team in a post-seed environment with significant runway and real traction with major global financial institutions.
• Take end-to-end ownership of product releases that fight financial crime, automating tedious manual tasks for compliance teams worldwide.
• Access a highly technical culture with deep fintech expertise and a serverless-first approach to building scalable AI infrastructure.

• Architect and build core AI agent infrastructure and API systems using TypeScript/JavaScript on AWS serverless environments.
• Design and implement critical integrations with legacy KYC/AML platforms relied upon by international banking partners.
• Collaborate directly with the CEO and CTO to translate customer feedback into rapid product deployments and architectural improvements.

• 1-5 years of experience building production systems, specifically demonstrating signs of excellence via top-tier universities or elite tech firms like Google or Stripe.
• Strong proficiency in JavaScript/TypeScript and serverless architecture (AWS) with a focus on high-quality backend engineering and CI/CD practices.
• A proven "builder mindset" evidenced by founding a company, launching side projects with users, or scaling early-stage VC-backed startups.

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 the job listing.

Step 2. Click 'Talk to Jack', or go straight there: https://www.jackandjill.ai/jobs/full-stack-engineer-70k-110k-equity-at-y-combinator-backed-ai-fintech-startup-1a0e165a-dd97-45dc-9bc2-c4be7699eaba?utm_source=linkedin&utm_medium=job_post&utm_campaign=featured_role_1a0e165a-dd97-45dc-9bc2-c4be7699eaba

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.