Product Security Engineer - €74.000 - €101.000 A Year

About the role At Stack AI, security is how we earn the trust of the enterprises building AI assistants on our platform. We're hiring a hands‑on (Senior) Product Security Engineer to design, build, and harden the secure architecture at the core of the product, working as a technical partner to our Core engineering lead. This is a hands‑on engineering role. You'll write production code and own the security‑critical systems the whole platform depends on: encryption and key management, customer data protection, and how security is built into the way every team ships. If you want deep ownership of these systems and the chance to harden and scale them as the platform grows, we'd love to meet you. What you'll do Own encryption and signing. Take ownership of our KMS, key management, BYOK, envelope encryption, and signing pipeline across both cloud and on‑prem deployments—operating, hardening, and evolving them as the platform scales. Protect the most sensitive customer data. Extend our PHI/PI...