AI Engineer (£60k-£84k + £500k Equity) at CapitalT-backed energy intelligence platform

Company: Jack & Jill
Apply for the AI Engineer (£60k-£84k + £500k Equity) at CapitalT-backed energy intelligence platform
Location: London
Job Description:

Job Title

AI Engineer

Salary

£60k-£84k + £500k Equity

Company Description

CapitalT-backed energy intelligence platform disrupting the £100B multi‑site utility sector

Location

London, UK

Job Description

Join as the first AI Engineer for a high‑growth London startup generating £20k+ MRR with 150% NRR. You will lead the transformation of a successful SaaS product into an AI‑native platform, building autonomous market arbitrage systems and hardware‑free energy intelligence to help multi‑site operators drastically reduce waste and costs.

Why this role is remarkable

  • Lead the AI evolution of a business with 22% month‑over‑month growth and proven product‑market fit serving UK and French markets.
  • Work directly with founders as employee #4 with a significant £500k equity package and direct influence on technical architecture.
  • Build sustainable technology that delivers immediate 28‑43% energy cost reductions, creating massive environmental and financial impact for hospitality and retail.

What You Will Do

  • Develop agentic systems for autonomous market arbitrage that monitor energy markets 24/7 to execute optimal contract renewals.
  • Engineer Zero‑Hardware Intelligence using NILM to disaggregate electrical loads and identify specific appliance energy usage without sub‑meters.
  • Build automated anomaly detection and leak waste systems that benchmark sites and trigger proactive work orders for operators.

The Ideal Candidate

  • Has 3‑6 years of experience in software engineering, data, or product management within high‑growth tech companies or scale‑ups.
  • Possesses hands‑on experience shipping production code involving LLMs or Machine Learning models in customer‑facing environments.
  • Demonstrates a forward‑deployed mindset with the ability to scope, build, and iterate on complex technical solutions directly with users.

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Posted: May 18th, 2026