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# Founding Engineer

- **Company:** Delfa AI
- **Location:** London, UK
- **Experience:** Experienced
- **Salary:** £56,913.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Microsoft Azure, Monitoring of Systems, PostgreSQL, TypeScript, ReactJS, Fastapi, Code Restructuring, Data Pipelines
- **Published:** September 23, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5893978711

## About the Role

* 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.

## Description

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, 2. 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.

 3. 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.
 4. Offer. If all the above goes well then you'll receive an offer from us!


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