Fractional Head of Engineering / AI Architect (£600-£700/day + Equity) at Foundy.com

Jack and Jill AI; Remote; GBP 100,000 - 125,000; Part time

Job summary

An innovative AI startup in the UK is seeking a Fractional Head of Engineering. This role involves architecting a groundbreaking algorithmic engine for matching business sellers with buyers using conversational AI agents. The successful candidate will conduct technical audits, design scoring systems, and create specifications for a mid-level engineering team. This unique opportunity offers flexibility and a fractional equity stake in a well-funded startup with a strong market pipeline.

Benefits

Equity stake in a funded startup

Flexible working hours

Qualifications

• Proven experience building multi-agent conversational AI or voice systems in production environments.
• Background designing complex two-sided matching engines or scoring systems for marketplaces.
• Senior leadership experience at post-seed / Series A startups.

Responsibilities

• Conduct a technical audit of current integrations to define a production-ready roadmap.
• Design the proprietary matchmaking scoring algorithm.
• Create detailed technical specifications and manage the mid-level engineering team.

Skills

Multi-agent conversational AI

Scoring systems design

Leadership in engineering

Job description

Fractional Head of Engineering

Salary: £600-£700/day + Equity

Company: Foundy.com – an AI-native M&A advisory platform building a world‑first matching engine for business sales.

Job Description: You will architect a novel algorithmic engine to match business sellers with buyers using dual conversational AI agents. As a fractional technical leader, you will audit existing no‑code infrastructure, design a scalable scoring system, and draft technical specs for execution. This role combines high‑level architecture with long‑term strategic engineering management.

Why this role is remarkable

• Architect a world‑first product applying conversational AI agents to the $50B+ M&A industry, turning relationship‑driven brokering into an algorithmic science.
• High‑impact fractional equity stake (1.2%) in a funded startup with a £2M+ pipeline and proven product‑market fit.
• Flexibility to lead high‑level technical strategy and team building without the daily grind of full‑time execution, while owning essential industry infrastructure.

What you will do

• Conduct a technical audit of current Supabase and Vapi integrations to define a production‑ready roadmap and scalable data model.
• Design the proprietary matchmaking scoring algorithm that weights buyer‑seller signals to deliver surgical targeting and valuation uplifts.
• Create detailed technical specifications and a hiring scorecard to recruit and manage the mid‑level engineering team through to exit.

Ideal candidate

• Proven experience building multi‑agent conversational AI or voice systems (Vapi, Retell, LangGraph) in production environments.
• Background designing complex two‑sided matching engines or scoring systems for marketplaces, recruiting platforms, or financial services.
• Senior leadership experience at post‑seed / Series A startups with the ability to translate non‑technical founder vision into robust engineering architecture.