Dolfin is building the agentic financial ops layer for the next generation of SMB platforms. As a Founding Engineer, you will build our core API-first platform from scratch, designing multi-tenant systems that embed AI agents into neobanks and SaaS providers. This is a high-ownership role working directly with founders to set the technical foundation.
This job is no longer actively hiring. Talk to Jack to find live roles.
Founding Engineer at Dolfin
Join Dolfin as a Founding Engineer to build the AI-native financial ops layer powering the next generation of SMB platforms. With a multi-million pound pipeline and advisors from Stripe and Payhawk, you will have the unique opportunity to design an API-first platform from scratch. You'll work directly with the founders to ship production-ready agentic workflows, moving beyond AI experiments to create real-world impact for fintechs and neobanks. If you are a senior builder looking for meaningful equity and the autonomy to set the technical foundation of a high-growth startup, this London-based role is for you.
Want to apply for this role?
This role is no longer actively hiring, but Jack can still help you discover similar open roles that fit.
Location
London, United Kingdom
Compensation
£90k-£110k + Equity
Company
Dolfin
Role overview
Fintech SaaS1-10 employees
Dolfin builds agentic financial operations infrastructure for SMB platforms. Think Ramp intelligence, but white-label and embedded inside any B2B platform. Instead of another standalone finance tool, Dolfin provides native AI agents that operate autonomously inside the platforms SMBs already use.
What you will do
- Design and build Dolfin’s core platform end-to-end, focusing on API-first, multi-tenant systems for seamless partner integration.
- Implement and scale production-ready agentic workflows using LLMs to automate complex financial processes like payables and expense management.
- Partner directly with founders on critical architectural trade-offs, ensuring security and permissions are built into the foundation of the stack.
Who this is a fit for
- A language-agnostic full-stack or backend-leaning engineer with a proven track record of shipping zero-to-one products into production.
- Hands-on experience with AI workflows and a product-minded approach that prioritizes systems thinking and customer impact over specific frameworks.
- Comfortable operating in a fast-paced, high-autonomy environment where you are expected to create structure rather than follow existing processes.
Why this role is remarkable
- True founding role with meaningful equity and the chance to shape the engineering culture and product direction from day one.
- Work on cutting-edge AI-native infrastructure where LLMs are treated as core system architecture rather than just surface-level features.
- Strong early momentum with signed contracts, a multi-million pound pipeline, and backing from senior advisors at Stripe, FIS, and Payhawk.
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.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.
I recruit from Jack’s network and make the intro when I spot a great match.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.
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
Meet Jack
What happens next?
Jack’s an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack’s network.
If your profile’s a match and Dolfin wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.