Founding Engineer: Dark Web Threat Intelligence Platform (Madrid)

About OnionSentry

OnionSentry is an early‑stage cybersecurity intelligence startup building a next‑generation dark web intelligence platform focused on structured, compliant, and actionable intelligence.

We combine automation, AI‑assisted analysis, and human validation to transform fragmented onion ecosystem signals into decision‑ready intelligence for enterprises, CSIRTs, and security teams.

The project is currently in prototype and pilot‑validation stage, with active development around WatchTower, our threat actor and ransomware monitoring module.

What We’re Looking For

We are looking for a Founding Engineer / Technical Co‑Founder to help accelerate the MVP build and evolve the platform toward pilot‑ready deployment.

This is not a traditional corporate role. We are looking for someone who enjoys building from zero, solving difficult technical problems, and shaping an early‑stage cybersecurity product with long‑term vision.

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