Who we areAction1 is an autonomous endpoint management platform trusted by many Fortune 500 companies. Cloud-native, infinitely scalable, highly secure, and configurable in minutes—it just works and is always free for the first 200 endpoints with no functional limits.By pioneering autonomous OS and third-party patching with peer-to-peer patch distribution and real-time vulnerability assessment without requiring a VPN, Action1 eliminates routine IT labor, helps prevent ransomware and security risks, and protects the digital employee experience.In 2025, Action1 was recognized by Inc. 5000 as the fastest-growing private software company in America .The company is founder-led by Alex Vovk and Mike Walters, entrepreneurs who previously founded Netwrix, a multi-billion-dollar cybersecurity company.The RoleWe are looking for a Product Security Engineer to join the team responsible for securing Action1’s multi-tenant SaaS product.In this role, you will work closely with engineering, product, and security teams to identify risks early, support vulnerability handling, improve secure development practices, and help make product security practical, clear, and actionable.This is a hands‑on role for someone who understands both software engineering and cybersecurity, enjoys working directly with developers, and wants to help build security into the product without slowing teams down unnecessarily.What you’ll doSupport PSIRT and vulnerability handling activitiesValidate, triage, track, and coordinate security reportsProvide practical remediation guidance to engineering teamsHelp validate security fixes and reduce product security risksReview code, APIs, and architecture to identify security issues earlyConduct threat modeling and security design reviewsImprove security automation in engineering workflowsSupport SAST, SCA, secrets scanning, and other security controlsMaintain SBOMs, dependency visibility, and remediation follow-upSupport security assessments,



vulnerability assessments, and penetration testingMaintain vulnerability handling playbooks, product security procedures, and incident response runbooksWhat we’re looking for3+ years of experience in product security, application security, DevSecOps, or a related cybersecurity fieldStrong software engineering background and ability to work effectively with engineering teamsUnderstanding of application, API, infrastructure, and software supply chain security risksExperience applying cloud security concepts and practicesUnderstanding of IAM, network security, logging, monitoring, and secure cloud architecture patternsFamiliarity with vulnerability management, incident response, security assessments, and secure SDLC practicesExperience with threat modeling and security design reviewsStrong communication skills, including professional communication with external researchers and vendorsAbility to work independently and as part of a team in a fast‑moving environmentNice to haveGenuine interest in cybersecurity and motivation to grow as a product security expertHands‑on experience with AWS security controls, best practices, and architecture patternsHands‑on experience with C++ or JavaScriptExperience with security testing and automation using scripting, APIs, CI/CD pipelines, or specialized toolsExperience with threat modeling for SaaS, API, cloud, or on‑prem product componentsExperience with SBOM generation, dependency visibility, or software supply chain securityWhat we offerFully remote work environmentOpportunity to work on a real security product used by IT and security teamsHigh ownership and direct impact on product security practicesClose collaboration with engineering, product, and security teamsFast-growing software company with low bureaucracy and practical decision‑makingOpportunity to improve security processes, automation, and engineering workflowsSupportive team that values clear thinking, ownership, and continuous learning#J-18808-Ljbffr

📌 Product Security Engineer (Madrid)
🏢 Action1
📍 Madrid