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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Security Engineer, 100% En remoto - **Company:** AppCast - **Location:** Spain (Remote available) - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Artificial Intelligence, Amazon Web Services, Software System Penetration Testing, Microsoft Azure, Cloud Computing Security, Cyber Security, Monitoring of Systems, Identity and Access Management, Python (Programming Language), Open Source Technology, Zero Trust Network Access, Security Information and Event Management, Kubernetes, Infrastructure Automation Frameworks, Information Technology, Cybercrime, Gsuite, SentinelOne Expertise, Docker, Security Orchestration, Automation & Response - **Published:** August 25, 2026 - **Apply:** https://www.empleate.gob.es/empleo/#/oferta/1856945847 ## About the Role policies, incident response, forensics, and endpoint management programmes Partner with Engineering to assess and mitigate risks from AI-enabled tools and workflows Explore and implement AI/automation in detection, analysis, and response pipelines Engage closely with North American and international staff across time zones Required Background Skills Bachelor s degree in Computer Science or a related field, or significant professional security experience 3+ years of hands-on experience in security engineering and incident response Experience with SIEM platforms and security monitoring systems Experience with EDR tools such as CrowdStrike or SentinelOne Knowledge of SOAR platforms and automation of security workflows Familiarity with Zero Trust architecture principles and threat hunting methodologies Experience with cloud security controls across AWS, GCP, and/or Azure Strong knowledge of Linux systems and Kubernetes/Docker environments Experience with IAM solutions and infrastructure automation Practical experience evaluating security implications of AI systems and AI-assisted workflows Experience managing security of Microsoft 365 and Google Workspace tenants Excellent written and verbal communication skills Preferred Background Skills Experience with certification processes: SOC2, ISO 27001, FedRAMP, or Cyber Essentials Plus Certifications: OSCP, GCIH, GCFA, or equivalent penetration testing / incident response credentials Experience in Go or Python Background in open-source communities Endpoint security management experience in a fully remote organisation Export Control Eligibility This role may involve access to information subject to U.S. export control regulations (EAR/ITAR). Applicants should be aware that eligibility requirements may apply. Many Spain-based security professionals with defence backgrounds will qualify. Mattermost takes a market-based approach to pay and pay may vary dependin ## Description cloud information security, and AI-enabled threat response. Why Join Mattermost Fully remote, globally distributed team no commute, genuine flexibility Be a key voice in shaping and delivering security strategy Competitive salary, equity, and benefits with meaningful work attached The Role As a Senior Security Engineer, you will lead the design and implementation of security tooling, harden our cloud and IT infrastructure, and serve as a key responder to incidents. You will work across a globally distributed team and partner closely with Engineering to manage AI-enabled risk. Key Responsibilities Lead security and IT projects to enhance the security posture of infrastructure and the company Detect, investigate, and remediate security incidents using SIEM, EDR, and SOAR tooling (e.g. CrowdStrike, SentinelOne) Conduct threat hunting across cloud and endpoint environments using a Zero Trust framework Administer company-wide IAM and security monitoring infrastructure Contribute to security ## Related Videos - [Fighting the Next Wave of Cybercrime](https://www.wearedevelopers.com/videos/100331-fighting-the-next-wave-of-cybercrime) - [Checkmate: 5 Real Incidents That Can End a Software Company](https://www.wearedevelopers.com/videos/100126-checkmate-5-real-incidents-that-can-end-a-software-company) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Deep Fakes: The Lies We Can’t See](https://www.wearedevelopers.com/videos/1187-deep-fakes-the-lies-we-can-t-see) - [Docker build without Docker](https://www.wearedevelopers.com/videos/100114-docker-build-without-docker) - [The Developer Workstation Blind Spot: Why Your Security Stack Can't See What Matters Most](https://www.wearedevelopers.com/videos/100254-the-developer-workstation-blind-spot-why-your-security-stack-can-t-see-what-matters-most) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [The Best Job Search Websites of 2025](https://www.wearedevelopers.com/magazine/368-the-best-job-search-websites-of-2025) - [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries)