Founding Engineer at Catapult
- Location
- London, United Kingdom
- Compensation
- Not Disclosed + Equity
Catapult is looking for a Founding Engineer in London to solve technical problems of "early-Google" proportions. Joining a small, obsessed team of repeat founders and researchers from Meta, Amazon, and Oxford, you’ll build an AI knowledge work agent that understands users before they even ask.
This is a high-impact role requiring the ability to manage a massive tech stack—from high-scale data ingestion to a performant desktop interface. If you’re ready to own the entire lifecycle of an ambitious product and earn significant equity in exchange for solving the toughest problems in AI, Catapult is where you belong.
What's the next step?
Jack finds you jobs at companies like Catapult. Talk to Jack to get considered for roles that fit what you're great at.
Role overview
As a Founding Engineer at Catapult, you will tackle technical challenges described as “early-Google” level difficulty. You will design and scale complex backend systems to manage massive personal data volumes while building a performant desktop product. Joining an elite team, you will take end-to-end ownership of the stack to transform global productivity.
About Catapult
AI · London, United Kingdom · Seed (VC-backed)
Catapult is the agent for your most ambitious knowledge work.
Before your first task, it has already built a deep understanding of you and everything you’ve worked on. It knows how you write, decide, what you’re building, and what needs to happen next. That understanding compounds with every task.
Catapult outperforms the highest-tier models in Claude Cowork and ChatGPT Work on most knowledge work tasks. Team of repeat founders, researchers and engineers from Meta, Amazon Research, G-Rese...
Backed by Blockchain Capital, Stani Kulechov, Eden Block, OrangeDAO, Ryan Berkun, Entrepreneur First.
What you will do
- Design and develop computationally heavy backend systems capable of ingesting, processing, and serving enormous amounts of personal data for AI agents.
- Build and maintain highly performant desktop applications using a modern stack including Python, TypeScript, and potentially systems languages like Rust or C++.
- Take complete end-to-end ownership of products, from researching new embedding models and memory systems to final UI/UX implementation and scaling.
Who this is a fit for
- Possesses 5+ years of experience solving difficult algorithmic problems and building complex, scalable infrastructure in high-stakes academic or industrial settings.
- Demonstrates mastery in Python, TypeScript, or systems languages like Rust/C++, with a proven track record of managing robust engineering workflows and cloud infrastructure.
- Has a background or strong interest in NLP, LLMs, or mathematics, with the ability to quickly implement cutting-edge AI research into production environments.
Why this role is remarkable
- Join an elite founding team of researchers and engineers from Meta, Amazon Research, G-Research, and top-tier institutions like Oxford, Cambridge, and Imperial.
- Tackle immense technical complexity involving high-scale data ingestion and real-time agentic interactions within a native desktop application environment.
- Benefit from significant equity in a high-growth startup, with full work-visa sponsorship provided to join the team in-person at their London office.
How Jack & Jill work together
What happens next?
Jack’s an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack’s network.
If your profile’s a match and Catapult wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.