As the first technical hire, you will build a complex risk-monitoring platform from the ground up. You will architect an intelligence engine that synthesizes signals from open-source feeds and licensed data into a real-time client interface. Working directly with the founders, you will define the technical roadmap and drive the core product vision.
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Founding Engineer at Fortalis
Are you ready to be the first technical hire at a high-stakes intelligence startup? This London-based seed-stage company is building a sophisticated platform to help organizations manage complex external risks by synthesizing global signals in real-time. As the Founding Engineer, you'll work directly with the founders to architect a data-intensive product using Node.js, Python, and React. If you have experience building intelligence-adjacent products and want to own the technical foundation of a company from day one, this is your opportunity to claim a significant stake in a mission-critical platform.
About this role
Role overview
About the company
Fortalis is building a software platform to detect and respond to complex, cross-domain security threats across government and critical infrastructure environments. Modern threats are increasingly coordinated across cyber, physical, and information domains, yet existing systems remain fragmented and siloed.
Our platform integrates best-in-class specialist SME technologies through a modular, interoperable software architecture. It ingests, interprets, and synthesises signals from multiple sources to generate a unified operational picture and produce decision-ready intelligence for end users.
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'll do
What you will do
- Architect and build the core Risk Monitor platform using Node.js, Python, and React, transitioning from prototype to production.
- Develop an AI synthesis layer that processes massive volumes of incoming data signals to generate actionable client briefs.
- Design and implement the database architecture using Supabase to manage complex entity relationships and alert thresholds.
Who you are
Who this is a fit for
- Proven experience building data-intensive or intelligence-adjacent products from scratch, ideally within early-stage startups.
- Full-stack proficiency with the ability to own both a React frontend and a backend infrastructure powered by Node.js and Python.
- A product-minded engineer who thrives on ambiguity and is excited to tackle the challenges of a pre-revenue, high-growth environment.
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Why this role
Why this role is remarkable
- Join as the first full-time engineer and shape the entire technical foundation of a high-stakes intelligence platform.
- Solve complex data engineering challenges involving real-time signal processing, AI synthesis layers, and sophisticated entity mapping.
- Work directly with founders in a fast-paced seed-stage environment with significant equity ownership and influence over product strategy.
Jack & Jill
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.
Meet Jack
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.
How does this work?
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 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.