Senior AI Engineer – EdTech, LLMs & TS, Early-Stage

Company: Jack & Jill
Apply for the Senior AI Engineer – EdTech, LLMs & TS, Early-Stage
Location: London
Job Description:

Company Description

Fast-growing AI edtech startup

Job Description

You will report directly to the CEO to shape the AI product experience for over a million monthly users. You will design and implement advanced features using the latest LLMs while developing deep expertise in model evaluation. This is a high-impact role at a Series A company focused on gamified learning.

Location

London, UK

Why this role is remarkable

  • Work at one of the UK’s fastest-growing startups during a period of massive user scale.
  • Join a well-funded Series A company backed by top-tier venture capital investors.
  • Gain significant ownership and influence as one of the company’s earliest engineering hires.

What you will do

  • Design and implement AI features using advanced prompt engineering with models like GPT and Gemini.
  • Utilize cutting-edge LLM evaluation techniques to assess and optimize system performance.
  • Deploy and integrate sophisticated AI models into a production-grade TypeScript backend environment.

The ideal candidate

  • Experienced software engineer with over 10 years of professional experience and mastery of TypeScript.
  • Holds a degree in Machine Learning or possesses deep professional experience evaluating AI models.
  • Possesses a maker mindset with previous experience as a founder or working in early-stage startups.

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Posted: May 26th, 2026