Platform Engineer – Early AI Platform (Equity)

Harnham; Greater London; On-site; GBP 120,000 - 140,000; Full time

Job summary

Harnham is seeking a Product Software Engineer to join an early-stage AI startup and own a cutting-edge platform used by enterprise customers. You will build LLM-enabled products from 0-1 and design scalable backend systems with API-first architecture.

You will work directly with founders and senior leadership on product direction and technical decisions, taking significant ownership as the company scales and the engineering function evolves.

Qualifications

• Experience as Product Software Engineer.
• Proven track record building LLM-enabled products 0-1.
• Strong backend experience with Node.js and TypeScript.
• Experience building API-first products and scalable platforms.

Responsibilities

• Own and scale a cutting-edge AI platform for enterprise customers.
• Design and develop scalable backend systems and APIs.
• Work directly with founders and senior leadership on product direction and technical decisions.

Skills

LLM-enabled products

Node.js

TypeScript

API-first design

Backend architecture

Product ownership

Job description

Harnham is seeking a Product Software Engineer to join an early-stage AI startup and own a cutting-edge platform used by enterprise customers. You will build LLM-enabled products from 0-1 and design scalable backend systems with API-first architecture.

You will work directly with founders and senior leadership on product direction and technical decisions, taking significant ownership as the company scales and the engineering function evolves.