This role is fully remote but the candidate is required to be based in Johannesburg ideally or greater South Africa or the UK About Sendmarc Sendmarc is a vibrant cybersecurity company focused on making the internet a safer place. Sendmarc delivers on this through tooling and services related to an international standard, DMARC. Our technology enables organizations to protect their staff, customers, suppliers, and the whole world from email spoofing and impersonation attacks on their domains. Mission Own a Sendmarc product area and ship the things that move customer outcomes and business metrics. Purpose of the role: To maintain and harden production Linux-based infrastructure across different regions and monitor and automate repairs of said production infrastructure that the business and engineering teams depend on. Key responsibilities: Managing Linux containerised(Kubernetes) infrastructure and databases across multiple regions. Managing our databases for performance, integrity, and availability Access management and security posture - Identity/permission/secrets management, patching and vulnerability management, continuous hardening. CI/CD pipeline ownership - maintain automated build, test, and deployment pipelines so deployments are safe and repeatable. Monitoring, alerting, and observability - instrument systems, set up dashboards and alerts, catch issues before users do. System reliability and performance - capacity planning, scaling, uptime/SLA management, cost optimisation. Backup, disaster recovery, and business continuity - ensure data is backed up and recovery is tested, not assumed. Automation of operational toil - script and automate repetitive manual tasks to remove single points of human dependency. Documentation and internal support - runbooks, architecture docs, and supporting engineering teams with tooling and environments. Incident response and on-call - triage outages, lead resolution, run post-mortems, reduce repeat failures. Minimum requirements: 5+ years as a Dev Ops Engineer or System Administrator for Linux & containerised infrastructure Beneficial: Cyber Security experience, Terraform/OpenTOFU/Terragrunt, Cloudflare, Azure, Active Directory (Entra) Tech stack: PostgreSQL, Redis, Docker, Kubernetes, Networking By joining Sendmarc, you'd enjoy: A values driven-organization, emphasizing the importance of care; focus, flow & happiness; simplicity & autonomy; psychological safety &; mastery & everyday improvement Flexible working arrangements