Senior AI Models Engineer

WE’RE HEIDI.

We're building the future of healthcare by giving every clinician the earth's finest AI Care Partner. In just 18 months, our clinical AI products have absorbed the administrative chaos of 73 million patient visits. Today, we support over 2.5 million patient sessions a week across 190+ countries.

Healthcare systems are failing us; clinicians spend more time on documentation than on patients, and the human connection that makes medicine worth practicing is eroding. Our mission is simple: double the world’s healthcare capacity and strengthen the human connection at its heart.

We found product-market fit with a freemium medical scribe that clinicians love. Now, we're expanding. Every task a clinician hands to Heidi is a patient who feels more attended to, a health system unclogged, and a clinician who gets to be a clinician again.

If you don’t choose easy and you want to build something way bigger than yourself then, choose the challenge, choose Heidi.

THE ROLE

We help enterprise customers build AI systems tailored to their specific work. Our goal is to deliver better economics than relying solely on closed-source models such as Claude, Gemini, and OpenAI.

You will work across model customisation, deployment, agent systems, and customer delivery. We do not expect one person to specialise in everything. You should bring strong experience in at least two of these areas and be comfortable collaborating across the others.

WHAT YOU WILL DO

As a Senior, you will own system design, technical decisions and customer outcomes. Your responsibilities will include:

Model customisation

• Turn customer use cases into training and evaluation plans.

• Select suitable data, models, and training approaches.

• Fine-tune and evaluate models for specialised domains.

• Improve quality based on testing and production feedback.

Deployment and inference

• Design cost-effective cloud or on-prem deployment approaches.

• Select...