Founding Engineer

Plan:it; Greater London; On-site; GBP 180,000 - 220,000; Full time

Benefits offered by this job

Equity

Founding engineer role

Competitive salary up to £200k

Job summary

Plan:it is an early-stage AI startup building agent-based products for regulated industries. You will join as a true Founding Engineer, working closely with a founding team to shape product and engineering culture from the ground up.

You will work on production-grade agentic systems, in-house AI tooling, and complex workflows in regulated environments, where reliability and accuracy matter most. You will influence product and architecture direction from day one.

Qualifications

• Proven track record building AI/agentic systems in production.
• Degree in CS from a top university preferred.
• Ability to lead architecture and product direction in an early-stage company.

Responsibilities

• Build production-grade agentic systems.
• Develop in-house AI tooling and infrastructure.
• Design and implement complex workflows in regulated environments.
• Focus on reliability, evaluation, and accuracy of systems.

Skills

AI systems in production

Software engineering

High ownership in ambiguous contexts

Influence over product & architecture

Education

Computer Science degree

Tools

In-house AI tooling

Job description

This is an early-stage AI startup building agent-based products for regulated industries.

They're already had some significant commercial wins, recently raised, and are entering the next phase of growth.

They're looking for an exceptional engineer with a strong technical background - ideally someone who has worked at a top-tier tech company, high-growth scale-up, or YC-backed startup.

You'll be joining as a true Founding Engineer, working closely with an exceptional founding team with backgrounds at a leading global tech company - helping shape both the product and engineering culture from the ground up.

What you'll be working on:

• Production-grade agentic systems
• In-house AI tooling and infrastructure
• Complex workflows in regulated environments
• Systems where reliability, evaluation and accuracy really matter

You'll likely be a strong fit if you:

• Have worked at a highly regarded tech company, successful startup or scale-up
• Have a Computer Science degree, ideally from a top university
• Are a very strong software engineer first and foremost
• Have experience building AI or agentic systems in productionThrive in high-ownership, ambiguous environments
• Want genuine influence over product, architecture and company direction
• True founding-level ownership
• Up to £200k + very generous equity
• Exceptional founding team
• Recently funded, with further growth ahead
• Technically ambitious AI product
• Opportunity to join early and materially shape the company