As the first technical hire at Fortalis, you will build the Risk Monitor platform from scratch. Working directly with the co-founders, you’ll own the entire stack, integrating data feeds, implementing an AI synthesis layer, and developing a client-facing portal. It’s a unique opportunity to shape a high-impact product for detecting cross-domain threats.
Founding Engineer at Fortalis
Fortalis is offering a rare opportunity to join as their first full-time Founding Engineer in London. Working directly with co-founders from UBS and intelligence backgrounds, you’ll build an AI-powered risk monitoring platform from the ground up to protect organizations from complex external threats. With a salary up to £120k and up to 4% equity, this role is perfect for a full-stack expert who thrives on autonomy and wants to own the entire product lifecycle—from data ingestion to the final user interface. Help bridge the gap between massive signal feeds and actionable intelligence.
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Location
London, United Kingdom
Compensation
£90k-£120k + Equity
Company
Fortalis
Role overview
Fortalis is building the pipeline to detect and respond to complex, cross-domain security threats for private and public clients. Existing systems remain fragmented and siloed.
Deployed within client environments, Fortalis is designed to integrate with existing systems and coordinate response workflows in real time. We are focused on building a scalable integration and synthesis layer for high-consequence environments, enabling faster detection, clearer insight, and more effective response,
What you will do
- Build and own the end-to-end intelligence platform, including entity mapping, feed integration, and a real-time AI signal processing layer using Node.js and Python.
- Architect the database and infrastructure using Supabase and Vercel to ensure reliability and speed as the platform ingests massive volumes of signal data.
- Design and develop the React-based client portal where organizations monitor alerts, review synthesized briefs, and coordinate their strategic response to external risks.
Who this is a fit for
- Proven full-stack engineering experience with a track record of building data-intensive products that ingest and synthesize signals from multiple disparate sources.
- Strong background in the modern JavaScript ecosystem or Python, with the ability to integrate LLMs and real-time AI pipelines into production-ready software.
- A founding-team mindset characterized by high autonomy, comfort with ambiguity, and a genuine desire to build a meaningful intelligence product from zero to one.
Why this role is remarkable
- Join as the first full-time technical hire with significant equity and the chance to shape the company’s entire architectural foundation and technical culture from day zero.
- Work alongside founders with deep domain expertise in intelligence and finance, building for a growing pipeline of early customers in a complex, high-stakes market.
- Solve sophisticated technical challenges at the intersection of real-time OSINT data processing, AI signal synthesis, and high-performance portal engineering for non-technical users.
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm 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.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm 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.
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
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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 Fortalis wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.