Senior Security Engineer

We are hiring a Senior Security Engineer to protect the people, infrastructure, and tooling that goes into building and hosting Mattermost. This is a hands‑on, high‑impact role at the intersection of enterprise security engineering, cloud information security, and AI‑enabled threat response.

• 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.
• 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 sec...