As a Founding Engineer, you will build and scale autonomous AI agents that automate clinical trial recruitment. You will own complex technical systems from architecture to deployment, directly impacting how life-saving treatments reach patients. Working in a high-talent density environment, you will solve 0→1 engineering challenges while scaling a product with seven-figure ARR.
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London, UKNot Disclosed + Equity
Featured roleLondon, UKNot Disclosed + Equity
Founding Engineer at Delfa.ai — AI-driven Clinical Trials
Delfa.ai is fixing the $120B clinical trial bottleneck with autonomous AI agents. Having already reached seven-figure ARR and raised $3.8M from Air Street Capital, they are hiring Founding Engineers to build the 0→1 systems that get life-saving treatments to patients faster. If you're a high-agency builder looking to work with world-class AI researchers and medical experts in London, this is your chance to make a massive impact.
Overview
Why this role stands out
Company
Responsibilities
What you will do
- Architect and scale core systems powering AI agents, managing everything from voice interactions to intelligent workflow orchestration across clinical trial sites.
- Drive complex engineering projects end-to-end, taking full responsibility for product features from initial design to production deployment and monitoring.
- Collaborate with a multidisciplinary team of AI researchers and clinical experts to build robust, reliable tools using a modern stack including FastAPI, Temporal, and LLMs.
Candidate profile
Who this is a fit for
- At least 3+ years of full-stack engineering experience with a proven track record of building and shipping high-quality software products at high speed.
- Strong ownership mindset with the ability to navigate ambiguous 0→1 environments and translate customer problems into scalable technical solutions.
- Deep builder instincts evidenced by significant side projects, open-source contributions, or experience with modern tools like TypeScript, React, and PostgreSQL.
What makes it remarkable
Why this role is remarkable
- Join a high-growth startup with seven-figure ARR growing 25% MoM, backed by an oversubscribed $3.8M seed round from tier-one AI investor Air Street Capital.
- Work alongside a world-class team including foundation model researchers from ETH Zurich, medical doctors, and engineers who have deployed production AI at J&J and Exscientia.
- Take full ownership of critical technical decisions and build systems from scratch that solve the $120 billion bottleneck in clinical trial patient recruitment.
Jack & Jill
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.
About Jack & Jill
Meet Jack
Jack gets to know what you are great at, what you want next, and makes sure Jill considers you for the right opportunities.
How does this work?
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 it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.
Jack