Metricool is seeking a Senior Security Engineer to own end-to-end security for our application, cloud, and AI features. You will harden security across JavaEE/Spring, manage AWS and containerized environments, and drive compliant security practices from design through deployment. You will run threat modeling, perform vulnerability testing on AI/LLM features, and lead ISO 27001/SOC 2 audits with a bias toward practical, developer-friendly security controls.