Skills & Experience

Job roles: Full Stack, Senior Engineer

Experience level: Senior

Tech stack/tooling used: Node.js, Python, React, SQL, FastAPI, Next, Vue.js, React Native, Pandas, LLM APIs (Claude or similar), Agent workflows, AWS, GCP

Core skills considered: Node.js, Python, React, SQL, LLM integration, Agentic AI systems

Other skills considered: AI-assisted development, LLM integration (Claude or similar), AWS

Logistics

Base salary: Undisclosed

Employment type: Permanent

Remote working: On-site, Hybrid

Visa sponsorship: Not available

Job Description

Hesta is creating a new benchmark in women’s health, delivering exceptional care at every life stage. As we advance towards this goal, we are committed to closing the women’s health gap, beginning with pregnancy and postpartum as our initial focus.

75 million years of women’s lives are lost every year due to poor health or early death. This gap limits potential, drives inequality, and reflects a healthcare system that wasn’t built for women. We are changing that.

The Opportunity

Our first mission is to reimagine care for mothers through compassionate care, clinical excellence, and technology. As we iterate towards product-market fit, we’re looking for a Senior Full-Stack Engineer to play a key role in building and evolving Hesta’s core platform.

You’ll work closely with our founders, product, and clinical teams to ship and iterate on Hesta’s product, while strengthening the foundations for scalable, intelligent care pathways. This is a hands-on senior IC role with meaningful technical ownership, business impact, influence over architecture, and the longer-term opportunity to grow a team.

What You’ll Do

• Build and own end-to-end product features across our stack - frontend, backend, infrastructure

• Translate clinical insights and user needs into high-quality, production-ready code

• Integrate AI capabilities using LLMs and agent-based workflows - e.g. smart triage, automation, decision support, and personalised user journeys

• Design and maintain data-compliant systems with privacy, security, and regulatory standards embedded by default (e.g. UK GDPR, NHS DSPT, MHRA guidance)

• Implement observability and metrics to understand product performance, user behaviour, and system health

• Design and evolve our architecture and technical foundations as we scale

• Contribute to a fast, iterative product loop - designing, shipping, learning, and improving continuously, including influencing trade-offs on product vs technical feasibility

• Ensure our systems and features are audit-ready and aligned with healthcare regulatory requirements

• Contribute to documentation and lightweight quality processes that support regulatory readiness

• Champion clinical-grade reliability, data integrity, and patient trust in everything we build

• Design and implement agent-based workflows using Claude or similar models to support clinical operations, automation, and internal tooling

Who You Are

• Experience - You have 5+ years’ experience in high-impact, early-stage product teams.

• Strong full-stack fundamentals:

  • Backend experience with Node.js and/or Python (FastAPI, Flask)

  • Experience with front end frameworks (React, Next.js, Vue). Exposure to cross platform frameworks a plus (e.g. React Native).

• Experience deploying and operating systems on at least one major cloud platform (AWS, GCP, or Azure), with containerisation (Docker; Kubernetes a bonus)

• You’ve built or worked on systems where data protection, access control, and auditability matter

• Product-minded - You think in terms of user outcomes and trade-offs, not just technical solutions. You care deeply about the user and collaborate closely with design and product

• Healthcare fluent - You understand (or are eager to learn) the constraints of clinical workflows, data privacy (e.g. UK GDPR, NHS standards), and safety

• Startup-ready - You’re resourceful, thrive in ambiguity, and know how to move fast without breaking trust

Bonus: Have experience in women’s health, digital therapeutics, or regulated health tech, have deployed LLM-powered features or agent-based systems in real-world applications, experience building in regulated industries, know your way around secure data pipelines or interoperability (FHIR, HL7)

AI-Related Experience (Nice to Have, Not Required):

• Experience working with LLMs such as Claude or similar, including prompt design, evaluation, and workflow orchestration.

• Familiarity with techniques such as RAG, tool use, agent orchestration, and evaluation of LLM systems

• An understanding of how to safely deploy LLM and agent-based features in real-world, user-facing systems

We strongly encourage applications from people of colour, the LGBTQ+ community, people with disabilities, neurodivergent people, parents, carers, and people from lower socio-economic backgrounds.

If there’s anything we can do to accommodate your specific situation, please let us know.

Company Benefits

• You’re joining a winning team. (Founders have worked at: Airbnb, Babylon, NHS, Oxford, UCL)

• A unique opportunity to join a startup at day zero and help build the backbone of a healthcare service designed specifically for women.

• Join a small, mission-driven team where your contributions have immediate impact.

• A close working relationship with, and mentorship from, our experienced co-founders

• Meaningful equity - we’re building this together

• Market rate salary

• Flexible, hybrid, working; our team work is based on the job that needs to be done, not office facetime

• Office facilities: Spacious working space, with other innovators in Victoria, bike storage, changing facilities and a healthy supply of tea/coffee

• 25 days annual leave a year + public holidays