Jack & Jill
Founding Engineer (£90k-£150k + Equity) at well-funded defence tech startup
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Founding Engineer
Salary
£90k-£150k + Equity
Company Description
Well-funded defence tech startup
Job Description
As the first technical hire at a well-funded defence tech startup, you will design and build a novel class of Large Behavioural Models from scratch. You'll lead technical architecture, pre-training infrastructure, and multi-agent simulations to protect democracies against information warfare, enjoying significant intellectual ownership over a mission-critical platform with global security implications.
Location
London, UK
Why this role is remarkable
- Unique opportunity to build frontier AI models specifically for cognitive security and national defence from the ground up.
- Backed by top-tier investors with significant pre-seed funding to tackle a high-stakes, globally relevant problem.
- Founding role offering substantial equity and the chance to define the technical culture and architecture of a mission-driven company.
What You Will Do
- Design and architect foundational Large Behavioural Models to simulate complex adversarial information campaigns across multiple platforms.
- Build and scale the pre-training infrastructure and evaluation frameworks necessary to support sophisticated agent-based simulations.
- Collaborate directly with leadership to define the product roadmap and technical direction of the entire modelling platform.
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The ideal candidate
- Proven experience pre-training foundation models from scratch at a frontier AI lab or equivalent high-performance research environment.
- Exceptional engineering skills with the ability to thrive in a high-ambiguity, greenfield environment as the first technical hire.
- Deeply motivated by the mission of cognitive security and eligible for UK Security Clearance to work on sensitive defence applications.
Who are Jack & Jill?
- Jack: An AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
- Jill: An AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Get help with your application
Your very own career expert that helps elevate your application to the next level.
How does this work?
- Jack: An AI agent for job searching and career coaching. He works for you.
- Jill: The AI recruiter working for the company. She recruits from Jack's network.
- If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.
We never post fake jobs
This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.
Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.
We appreciate this can make them look a bit suspect, but there isn't much we can do about it.
Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.
“It took my CV and asked me questions relevant to understanding what kind of jobs to suggest for me. Suggestions were almost perfect. Jobs were exactly what I’ve been looking for.”
Jessica, London
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