security
Posted 2 weeks agoSenior Security Engineer
at Mattermost
SpainOn-site
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
- Explore and implement AI/automation in detection, analysis, and response pipelines
Requirements
- Teams operate across web, desktop, and mobile, with embedded interoperability for Microsoft Teams, Outlook, and Microsoft 365.
- This is a hands-on, high-impact role at the intersection of enterprise security engineering, cloud information security, and AI-enabled threat response. Why Join Mattermost
- You will work across a globally distributed team and partner closely with Engineering to manage AI-enabled risk. Key Responsibilities
- Partner with Engineering to assess and mitigate risks from AI-enabled tools and workflows
- Bachelor’s degree in Computer Science or a related field, or significant professional security experience
- 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
- 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
- experience in a fully remote organisation
Experience
- 3+ years of hands-on
Benefits
- Competitive salary, equity, and
- The successful candidate’s starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions.
- Posting Range €62.000 — €82.000 EUR Mattermost is an EEO Employer, we are a remote-first, open-source company. We are continually working to expand our hiring in more countries and regions, ensuring compliance with local laws and regulations, which takes time. Mattermost values your unique perspective—we welcome all applicants.
Contact
- To learn more, visit www.mattermost.com
Additional details
- Mattermost is the leading collaborative workflow platform for defense, intelligence, security, and critical infrastructure. Trusted by the U.S.
- Department of War and Fortune 500s, our platform runs on-premises and in private clouds, delivering secure messaging, file sharing, workflow automation, audio/screenshare, and project management—all with full data and operational control.
- Mattermost powers high-stakes workflows across mission planning, real-time, real-world operations, DevSecOps, incident response, and cyber defense—enabling secure collaboration from tactical edge and DDIL environments to enterprise HQ.
- We are hiring a Senior Security Engineer to protect the people, infrastructure, and tooling that goes into building and hosting Mattermost.
- Fully remote, globally distributed team | no commute, genuine flexibility
- Be a key voice in shaping and delivering security strategy
- 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.
- Contribute to security policies, incident response, forensics, and endpoint management programmes
- Engage closely with North American and international staff across time zones
- Excellent written and verbal communication skills