Factorial is seeking an Application Security Engineer in Barcelona to proactively hunt for vulnerabilities and strengthen defenses. You will test applications, APIs, and AI-powered features, reproduce external reports, and work with product teams to remediate issues.The role requires 3+ years in application security and fluency in English. The team collaborates across Product and Engineering to ship with security baked in, while offering a adaptable office-first, hybrid model.#J-18808-Ljbffr