Founding Full Stack Engineer (80K + Equity) at Klaris

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Job Title: Founding Full Stack Engineer

Salary: 80K Equity

Company Description: Klaris - Pre-seed AI startup backed by an NHS-affiliated VC and Antler

Job Description:
Join as the first engineering hire to architect an AI platform automating complex MedTech regulatory compliance. You will transition the product from prototype to a scalable production system working directly with a CTO (PhD in Multi-Agent Systems) to help medical device companies navigate audits and reach patients faster through intelligent documentation automation.

Location: London UK

Why this role is remarkable:

• Founding-level impact with significant equity and the autonomy to establish the technical foundations engineering standards and hiring culture of a mission-driven startup.

• Work on a non-wrapper AI product using proprietary datasets to solve a massive high-stakes problem in a regulated industry with clear market pull and pilot traction.

• High-growth environment backed by strategic investors including an NHS-affiliated VC Antler UK and Vento Ventures offering a direct path to shaping a generational MedTech company.

What you will do:

• Architect and build critical end-to-end components across the entire stack using TypeScript and PostgreSQL while managing cloud infrastructure on AWS/GCP.

• Collaborate directly with the CTO to integrate custom AI models and LLM endpoints into a secure production-ready platform that identifies regulatory gaps and remediations.

• Lead the development of intuitive user interfaces from Figma designs ensuring high performance responsiveness and seamless state management for complex medical documentation workflows.

The ideal candidate:

• 4 years of professional experience with the TypeScript/React/ stack demonstrating the ability to design and implement successful standalone products or high-scale features.

• Proven 0-to-1 startup DNA with the high agency required to thrive in ambiguity making independent architectural decisions without needing existing structure or oversight.

• Technical expertise in modern DevOps practices including containerization (Docker/Kubernetes) CI/CD pipeline management and secure database schema design for sensitive regulated data.

Who are Jack & Jill
Ok Ill go first. Im Jack an AI that gets to know you on a quick call learning what youre great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up supporting you with applications interview prep and moral support.
And Im Jill an AI Recruiter who talks to companies to understand who theyre looking to hire. Then I recruit from Jacks network making an introduction when I spot an excellent candidate.

Next steps
Step 1. Visit our website.
Step 2. Click Talk to Jack.
Step 3. Talk to Jack so he can understand your experience and ambitions.
Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.
Step 5. If Jill thinks youre a great fit and her client wants to meet you they will make the introduction.
Step 6. If not Jack will find you excellent alternatives. All for free.

We never post fake jobs
This isnt a trick. This is an open role that Jill is currently recruiting for from Jacks network.
Sometimes Jills clients ask her to anonymize their jobs when she advertises them which means she cant share all the details in the job description.
We appreciate this can make them look a bit suspect but there isnt much we can do about it.
Give Jack a spin! You could land this role. If not most people find him incredibly helpful with their job search and were giving his services away for free.

Required Experience:

IC