Lead AI Engineer

Founding engineer and AI lead for Seento, our AI patient care platform, with a path to CTO. You'll be our first senior technical hire, building Seento into the AI platform that runs patient care around surgery, at scale. Seento is a mobile-first, AI-powered patient care platform. It fits into the surgeon's own workflow on WhatsApp and email, and it's free for surgeons. Seento's AI runs the patient communications; our CQC-registered doctors run the care; surgeons get back to surgery. The AI books and reminds, chases forms and results, runs check-ins and flags anything clinical to a doctor. When a surgeon hands a patient to us, our doctor-led team looks after them before and after the operation, or at home with no operation at all. Seento launched on 1 October 2026. In its first month it took on 100+ patients and 10 consultants, and two clinics are beta testing it. Behind it is Surgical Recovery, a CQC-registered, doctor-led service that has cared for 500+ patients since 2022. We're in live conversations with hospitals, clinics and insurers in the UK, the Middle East, Asia and North America, and our startup partners include Google for Startups, Microsoft for Startups and Barclays Eagle Labs. Seento was built in-house by our CEO. Seento runs on Claude today, and we're developing our own proprietary AI.

Your job is to own the platform, make it production-grade, lead our AI programmes and build the engineering team around them, alongside our new data scientist.

What you'll do:

• Own Seento. Take over the platform, and make it secure, reliable and ready to scale.
• Lead our AI. The AI that runs patient communications today, and the programmes building our own proprietary AI.
• Keep it safe. Make Seento fit for clinical use and for hospitals, insurers and health systems.
• Build the team. Hire and lead our engineers, working alongside our data scientist.

You’ll work closely with the CEO, who sets product direction, and the CMO, who owns clinical safety.

What you'll bring:

• Must have 8+ years building software, including leading the technical side of a product used by real customers, ideally as an early engineer, tech lead or founder.
• Hands-on production experience with LLMs and AI agents: tool use, workflow orchestration, retrieval, evaluation, guardrails and monitoring.
• Experience with messaging-first products: WhatsApp Business API, Twilio or similar, and mobile-first design for busy users.
• Experience shipping in a regulated or high-trust setting (health, finance, insurance, government), including security, audit and data protection.
• Strong full-stack skills and integration experience (APIs, webhooks, calendars).
• Comfortable taking over a live codebase you didn't write, improving it without stopping the service, and documenting as you go.
• Health software standards: DCB0129, DTAC, DSPT, FHIR or HL7.
• Medical device software: MHRA or FDA, IEC 62304, ISO 13485.
• Data engineering for machine learning, and putting models into production.
• Voice and speech AI.
• You've hired and led a small team, and worked with contractors.

You might be a CTO or tech lead at a health-tech or AI start-up, a founding engineer, or a Staff or Principal Engineer ready to lead. What you've built and shipped matters more than your title.

How we work:

• We're a small, doctor-led team. These are the things we hold to, and we'd expect you to hold us to them too.
• Patients first, safety always. AI does the admin; a doctor makes every clinical decision. If something isn't safe, it doesn't ship, however good the demo looks.
• Evidence over claims. We say what we can prove, and we correct our own numbers when they're wrong. We want an engineer who measures, tests and writes things down.
• Build what's needed now. We hire and spend against real patient numbers. Simple, reliable and finished beats clever and half-built.
• One team with clinicians. You'll sit alongside our doctors, physiotherapists and the surgeons who use Seento, and you'll see how the work is really done before you automate it.
• Ownership without ego. Everyone does what the patient needs, from fixing a bug at 8pm to walking a consultant through a referral.

What we offer:

• Lead the platform. You're the senior technical person in the company and Seento's named technical owner, working directly with the CEO and CMO.
• Equity. Equity is available as part of the package, agreed with the right candidate.
• Pay. The salary starts modest, alongside equity, and increases once our seed round closes.
• A path to CTO. As the team and the platform grow, this role is designed to grow into CTO.
• Work that matters. One in six people having planned surgery suffers a complication, and too many operations are cancelled on the day. Your work helps fix that.

Location: Full-time. You must live in the UK and have the right to work here; we can't sponsor visas. Ideally you're in or near London. We work hybrid, with regular in-person days in London with the team, clinicians and partners. Our team, data and hosting stay in the UK.