Platform Engineer – Early AI Platform (Equity)

Company: Harnham
Apply for the Platform Engineer – Early AI Platform (Equity)
Location: London
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.

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Posted: October 14th, 2026