---
title: 'Founding Engineer at Delfa AI'
canonical: 'https://feeny.ai/job/founding-engineer-delfa-ai-london-gtaza0qj91vn'
type: 'job'
last_seen: '2026-10-17'
---

# Founding Engineer at Delfa AI

- **Company:** Delfa AI
- **Location:** London, United Kingdom
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-09-21
- **Last confirmed live:** 2026-10-17
- **Apply:** https://jobs.ashbyhq.com/delfa/9fa18a24-8098-4583-b5c6-c7736d92f731

## Job description

## About Delfa

Billions of people still suffer from every-day diseases. One key reason? Clinical trials are broken. Despite $120 billion spent each year, most trials are delayed due to bottlenecks like patient recruitment. Delfa is fixing this with autonomous AI agents. We're building AI agents to automate clinical trials. In the last year from we’ve already:

- Deployed onto 500+ trials across multiple conditions
- Reached seven figures in ARR, growing 25% MoM
- Raised an oversubscribed $3.8m seed from tier-one AI investors

## What You'll Do

You'll build and scale the core systems that enable Delfa's AI agents to deliver real-world clinical impact.

- Design, build, and scale AI agent systems end-to-end: from voice interactions to intelligent workflow orchestration across trial sites
- Own complex projects from architecture to deployment, with real autonomy over technical decisions
- Build and evolve the infrastructure, observability, and monitoring systems needed to ensure quality and reliability at scale
- Integrate leading-edge models from AI labs into production workflows, evaluating and adopting new capabilities as the frontier moves
- Design robust data pipelines for ingesting, transforming, and serving high-quality healthcare data
- Continuously improve internal AI tooling and platform to unlock new use cases and increase team velocity

Our current tech stack: FastAPI · Pydantic · TypeScript · React · OpenAI / Anthropic · Temporal · PostgreSQL · Honeycomb · PlanetScale · Azure

You'll Be A Great Fit If…

- You have 3+ years of professional full-stack engineering experience: We're looking for somebody comfortable with solving hard technical problems, refactoring when needed, and knowing what's enough and what's too much to solve a problem.
- A track record of building high-quality products fast: Delfa's got big ambitions to materially accelerate getting life saving treatments to market. This is necessary and urgent work so we need individuals who can deliver.
- An ownership mindset: We position our team to understand customer problems, give you the autonomy to find the best path forward, and expect you to own the solutions.
- A growth mindset: We're looking for people who take pride in their work and are always looking to improve it. If your work doesn't matter to you, it won't end up mattering to our customers. If you're not growing, your impact won't grow either.

Life at Delfa Delfa is building a generational company to transform the way medications reach millions of patients in need. This is your opportunity to get in on the ground floor and work alongside the highest talent density team in the space, onsite at our London office 5 days a week:

- A wine-snob who built foundation models at Roche during ETH Zurich PhD
- A former hedge fund trader with world class causal AI knowledge
- A medical doctor turned AI engineer who builds prototypes on the weekend for fun
- A ginger bloke who deployed production AI for J&J, Medtronic, and Exscientia

## What We Offer

- Competitive salary + meaningful equity
- Private health insurance and gym membership
- 25 days’ holiday + UK public holidays
- Modern office space 5 mins from Old Street station
- True 0 → 1 ownership. You’ll take full responsibility for critical product features that get new treatments to patients, faster.

Our Hiring Process We work to get you an offer within a week with the following lean process:

- Intro chat withhttps://www.linkedin.com/in/farrandtom/%5C[Gustav](https://www.linkedin.com/in/gustavbredell/) (CTO) - 30 mins: An informal discussion about your experiences, values, and career goals, and give you an opportunity to get a sense of the role and the team. After this call we may ask you to share some work you’re proud of.
- Coding Challenge - 90 mins: No artificial interview questions. Instead, you will work through a real-world challenge similar to problems we solve every day. You are welcome to use AI tools. We believe great engineers should know how to solve problems effectively, including with AI.
- System Design Challenge - 90 mins: We will invite you to our office to spend time with us in person. Together, we will work through a real-world system design problem. This is the best opportunity for you to see what it would be like to work with us, and for us to understand how you think and collaborate.
- Offer. If all the above goes well then you’ll receive an offer from us!

If helping unstick clinical trials and getting life-saving treatments to patients faster sounds like your idea of important work, let’s talk.

## About Delfa AI

## Company Overview
- **One-liner**: Delfa AI builds AI-powered agents that automate patient recruitment, pre-screening, scheduling, and engagement for clinical research sites.
- **Entity Type**: Private (Series A)
- **Headquarters**: San Francisco, California, United States (with presence in United Kingdom, Argentina, and Switzerland)
- **Founded**: 2024
- **Founders**: Tom Farrand (CEO) and Gustav Bredell (CTO)

## Core Business
- Primary industry: Healthcare IT / Clinical Research Technology
- Target customers: B2B – Clinical research sites, site networks, and trial sponsors
- Mission or purpose statement: To accelerate clinical trials by automating the patient recruitment process, helping life-saving treatments reach patients faster.

## Products & Services
- **AI-Powered Patient Recruitment Platform**: An AI-native Patient Relationship Management (PRM) system that automates patient pre-screening, scheduling, engagement, and follow-up across voice, chat, SMS, and email. The platform includes custom-built AI agents, a centralized inbox for all channels, automated CTMS/CRM updates, and a prioritized task list for recruiters.

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company)
- **Key Metric**: Total Funding – $3.8M (Seed round, oversubscribed, led by Air Street Capital)
- **Notable Investors/Partners**: Air Street Capital (lead investor), along with other top AI investors
- **Growth Signals**:
  - Revenue in the "mid six figures" within 3 months of launch, with product usage growing over 300% month-over-month.
  - Live on 30+ clinical trials across therapeutic areas including heart disease, Alzheimer’s, migraine, epilepsy, and weight management.
  - Headcount grew 175% year-over-year to 8 employees, with active hiring for multiple roles.
  - Real customer results: $42,000 labor savings in one month for a leading US site network; 101 patients randomized in one month; 50% of site target enrolled in one week for a growing site network.

## Competitive Advantages
- **Domain Expertise**: Founding team combines deep AI/ML research (PhD from ETH Zurich, foundation models at Roche) with clinical experience (medical doctors on staff).
- **Proven Traction**: Rapid customer adoption and strong ROI metrics from live deployments.
- **Custom AI Agents**: Agents are built custom to each study and "battle tested" by a team of medical doctors and AI engineers, reducing hallucination risk.
- **Integration Depth**: Seamlessly syncs with existing CTMS and CRM systems, saving hours of manual data entry.
- **Multi-Channel Engagement**: Supports voice, chat, SMS, and email in a single platform, with multilingual capability.

## Strategic Focus
- Current priorities: Scaling the platform to handle growing customer demand, expanding the engineering and operations teams, and deepening integrations with clinical trial management systems.
- Direction for growth: Becoming the standard AI-native PRM for clinical research sites globally, expanding into new therapeutic areas, and automating more aspects of the patient journey.

## Why Work Here
- **Impact**: Directly contribute to accelerating clinical trials and getting life-saving treatments to patients. The company states "80% of all clinical trials are delayed because of patient recruitment."
- **Growth Stage**: Early-stage (Series A) with strong product-market fit and explosive growth – employees can have outsized impact.
- **Team**: A small, high-caliber team of founders, engineers, and medical doctors from top institutions (ETH Zurich, Roche, NHS, J&J, Medtronic).
- **Culture**: Values include trust, openness, honesty, and accountability. Described as a safe place to take risks.
- **Remote/Hybrid**: The team is distributed across the US (San Francisco), UK, Argentina, and Switzerland, suggesting a remote-first or highly flexible work environment.
- **Notable Perks**: Opportunity to work directly with founders, shape the product from an early stage, and be part of a company that is already generating significant revenue and customer love.

## Sources
1. [delfa.ai](https://www.delfa.ai/)
2. [delfa.ai/careers](https://www.delfa.ai/careers)
3. [linkedin.com/company/delfa-ai](https://www.linkedin.com/company/delfa-ai)
4. [delfa.ai/product](https://www.delfa.ai/product)
5. [tracxn.com](https://tracxn.com/d/companies/delfa/__5mD_tGEqYZ31mrD4I6eoOT5CtZOCazyw4wN96hpSeQY)

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