Lead Python Engineer API LLM

Salary: £40,000 - 70,000 per year

Requirements:

• We want strong technical skills, primarily with Python.
• We want experience with RESTful APIs; we use FastAPI.
• Experience with TypeScript, React, and other web technologies such as HTML5 and CSS3 would be beneficial.
• We want experience with LLMs and agentic AI.
• You should enjoy taking ownership and be able to build software from scratch and iterate quickly.
• You should be curious by nature, happy to learn, and able to pick up new things.
• You should be keen to work in a start-up environment and comfortable with unstructured environments.
• You should be collaborative with great communication skills.
• You should be degree educated, minimum 2.1 at BSc from a top tier university, preferably in Computer Science or a closely related discipline; an MSc or PhD is likely.
• Advanced Python skills combined with tech start-up experience are preferred.

Responsibilities:

• We will build scalable, cloud-native applications across the full software development lifecycle.
• We will take ownership of architecture and backend services.
• We will contribute to frontend development, CI/CD, and deployment on Azure.
• We will collaborate closely with the founding team to influence technical direction and solve complex engineering challenges.
• We will establish the engineering practices that will underpin the companys future growth.
• We will work primarily with Python and TypeScript.
• We will leverage AI technologies to build innovative products that solve real-world problems.
• We will take a hands-on role with plenty of autonomy and a direct influence on product decisions, architecture, and engineering culture.

Technologies:

• Agentic AI
• AI
• Azure
• Backend
• CI/CD
• Cloud
• FastAPI
• Frontend
• HTML5
• Python
• React
• TypeScript
• Web
• API
• LLM

More:

We are a fast-growing AI start-up with strong backing and ambitious growth plans, building technology that is transforming compliance and operational efficiency across the NHS and wider regulated industries. This is a founding engineer opportunity working alongside experienced founders in a highly collaborative environment. You will join our team in London two days a week, with one day a week in Cambridge too, with expenses covered, and flexibility to work from home. We offer a salary of up to 115k, equity, and an impactful role with excellent career growth opportunities.

last updated 36 week of 2026