At a Glance
- Tasks: Build enterprise-grade AI agents and solve complex engineering problems.
- Company: Join an Andreessen Horowitz-backed AI startup with a collaborative culture.
- Benefits: Competitive salary, equity, and the chance to shape engineering culture.
- Other info: Exciting opportunity for career growth in a fast-paced startup environment.
- Why this job: Own products end-to-end and influence the future of AI technology.
- Qualifications: 4+ years in software engineering, strong TypeScript and AWS experience.
The predicted salary is between 80000 - 120000 £ per year.
- Founding Software Engineer | AI Agents | San Francisco or
- London
Location: San Francisco, CA or London, UK (London-based candidates must be willing to relocate to San Francisco in 2026) This is a genuine Founding Engineer opportunity to join an Andreessen Horowitz-backed AI startup as Engineer #2/3.
Already trusted by Fortune 500 customers including a trillion-dollar enterprise you'll help build enterprise-grade AI agents that solve one of the most challenging problems in business automation: transforming highly unstructured data into fully auditable outputs using cutting-edge LLMs and agentic AI.
This isn't another AI startup building chatbots.
It's an opportunity to own products end-to-end, influence technical direction, and help shape the future of a rapidly growing company from the earliest stages.
You'll enjoy this role if you: Love building products from the ground up.
Thrive in fast-moving startup environments.
Want genuine ownership rather than simply delivering tickets.
Enjoy solving complex engineering problems with modern AI technologies.
Want direct exposure to founders, customers and product strategy.
Aspire to build or lead a company one day.
We're looking for engineers who have: 4+ years' commercial software engineering experience (flexible for exceptional candidates).
Built and shipped AI-driven or agentic products into production.
Strong Type Script experience.
Commercial AWS experience.
Full-stack product ownership.
Enterprise Saa S or B2B product experience.
A passion for building in early-stage startups.
Location We're keen to hear from engineers who are: Already based in San Francisco or the wider Bay Area.
Based in London and excited by the opportunity to relocate to San Francisco in 2026.
Package $Competitve base salary 0.81.2% equity Genuine Founding Engineer position Opportunity to shape engineering culture and technical direction Work directly alongside experienced founders solving real enterprise AI challenges If you're looking for a role where you'll have genuine ownership, meaningful equity and the opportunity to build category-defining AI products, I'd love to have a confidential conversation.
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Founding Software Engineer employer: Trunorth Limited
Join a pioneering AI startup backed by Andreessen Horowitz, where you'll be at the forefront of innovation as a Founding Software Engineer. With a vibrant work culture that fosters collaboration and creativity, we offer exceptional growth opportunities and the chance to make a significant impact from day one. Located in the tech hub of San Francisco, you'll enjoy a dynamic environment that attracts top talent and provides access to cutting-edge resources.
