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Clinical AI Engineer

United KingdomUnited Kingdom·Londonfull-timemid
Machine Learning EngineerData
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Quick Summary

Key Responsibilities

endpoints, comparators, ground truth, sample size, analysis plan. Set the bar before the result arrives. Build the measurement. Build,

Technical Tools
Machine Learning EngineerData

We're building the future of healthcare by giving every clinician the earth's finest AI Care Partner. Our platform has absorbed the administrative chaos of 175 million patient visits and supported 67 million clinical hours. Today, we support 2.8 million patient sessions a week across 190+ countries, in 110 languages and over 200 specialties.

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 capacity for care 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.

We’ve grown annual recurring revenue from $1 million to $50 million in two years.

To go further, we’ve secured US$340 million: a $100 million Series C led by Blackbird, with Phoenix Court, Point72 Private Investments and Headline, alongside a $240 million growth investment led by General Catalyst’s Customer Value Fund.

If you want to join us in doing work worth shipping, jump in.

We’re looking for a doctor who has moved into AI and can code, to join Clinical AI R&D as a Clinical AI Engineer. You’ll sit inside a product pod and own the evidence for its product: define the evaluation before anyone builds, run it to a standard a journal reviewer would accept, keep watching the product once it ships, publish what the evidence shows, and change the product when the evidence says to.

Responsibilities

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What We Offer

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✓Equity from day one. When Heidi wins, you win. You'll share directly in the success you help create.
✓Your health, covered. Comprehensive private medical and dental cover through Bupa, plus 24/7 mental health, coaching and wellbeing support through Sonder and a £100/month Healthy Heidi’s stipend.
✓Global parental leave. 26 weeks paid for primary carers and 18 weeks for secondary carers, subject to eligibility.
✓Fertility support. £7,000 one-off payment, eligibility applies.
✓Learning & development. £700 per year for courses, books, memberships, conferences and more.
✓Home office budget of £500 one-off to set up a workspace you actually want to work in.
✓Recharge days after major milestones and busy periods so you can reset and come back strong.
✓Work from anywhere for up to 4 weeks per year, wherever the world takes you.
✓Clinical leave. 10 days per year for eligible clinical roles to maintain accreditation and requirements.
✓Flexibility that works. A hybrid environment, with 3 days in the office.

Requirements

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  • Post-market surveillance or vigilance work under a medical device framework (TGA, MHRA, FDA or EU MDR). Appetite to learn counts for more than existing depth.

  • Peer-reviewed publications on clinical AI or LLM evaluation.

  • Machine learning background beyond prompting, such as fine-tuning or classical model evaluation.

  • Specialty depth in an area Heidi is moving into.

  • An academic or clinical-site network able to host a study.

You’ll join a team measured on real-world impact, not press cycles. We live and breathe the challenges of modern health systems, and are laser-focused on exacting the change we’d like to see. We’re medicos, engineers, builders and designers who’ve felt (on every side of the equation) what non-care feels like, the moral and practical toll as a provider or receiver.

Building what we’re building isn’t always easy. Standard tech playbooks routinely fail in healthcare, and the friction of the medical system will test your perseverance. But we didn’t choose easy, we chose a purpose-driven mission that actually matters. We hold ourselves to a higher standard because healthcare demands it. If you join Heidi, you recognize that the deeper question isn’t whether AI can solve the global healthcare crisis, but whose hands will shape it.

True A-players progress extremely fast here. The nature of the scale-up game is demanding, but we value sustainable performance and mental health. You're trusted to perform, and you set your schedule. We operate on outcomes > inputs, not process theatre. We all take the bins out, metaphorically and literally.

Heidi is dedicated to creating an equitable, inclusive, and supportive work environment that brings people together from diverse backgrounds, experiences, and perspectives. Our strength is in our differences. We're proud to be an equal opportunity employer and are proud to welcome all applicants as we're committed to promoting a culture of opportunity for all.

Location & Eligibility

Where is the job
London, United Kingdom
On-site at the office
Who can apply
Open to applicants worldwide

Listing Details

Posted
October 14, 2026
First seen
October 14, 2026
Last seen
October 14, 2026

Posting Health

Days active
0
Repost count
1
Trust Level
51%
Scored at
October 14, 2026

Signal breakdown

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Clinical AI Engineer