Lead Infrastructure & DevOps

1. Infrastructure & OS Management

• Manage and maintain Linux-based systems (Rocky Linux CentOS RHEL) in production and staging environments.

• Perform kernel patching security updates and system hardening following industry best practices.

• Troubleshoot and debug complex OS-level issues (performance memory I/O kernel panics).

• Manage and support Windows Server environments where applicable.

2. Security & Compliance

• Perform regular security scanning and vulnerability assessments using tools like Nessus Qualys or OpenVAS.

• Conduct code security scans (SAST/DAST) and integrate them into CI/CD pipelines.

• Configure and maintain LDAP authentication for centralized access management.

• Ensure all systems comply with internal security policies and external regulatory standards.

• Implement and manage WAF (Web Application Firewall) configurations to protect against OWASP Top 10 threats.

3. Automation & Configuration Management

• Write and maintain Ansible playbooks for automated provisioning patching and configuration management.

• Manage GitHub Enterprise repositories branching strategies and CI/CD workflows (GitHub Actions preferred).

• Develop automation scripts using Python Shell or Go to reduce toil and improve operational efficiency.

4. Application & Web Server Management

• Configure and maintain Apache and Nginx web servers including performance tuning and reverse proxy setup.

• Troubleshoot web server logs SSL/TLS issues and load balancing configurations.

5. Container Orchestration & Cloud-Native Technologies

• Deploy manage and scale applications on Kubernetes clusters (EKS AKS or on-prem).

• Build and maintain Docker images with secure base layers and minimal attack surfaces.

• Monitor cluster health resource usage and implement auto-scaling policies.

6. Monitoring & Incident Management

• Deploy and maintain monitoring tools (Prometheus Grafana Datadog or ELK stack).

• Define SLIs SLOs and error budgets; drive blameless post-mortems.

• Participate in on-call rotations and lead incident response efforts.

• 8 years in SRE DevOps or Systems Engineering roles.

• Experience with Terraform or other IaC tools.

• Familiarity with service mesh (Istio/Linkerd) and CNI plugins (Calico/Cilium) or similar.

• Understanding of zero-trust networking and SSO integrations.

• Certifications: RHCE CKA or CISSP are a plus.

OS: Expert in Rocky Linux CentOS RHEL (6 years); Windows Server experience

Security: WAF vulnerability scanning LDAP OS hardening kernel patching

Automation: Ansible (playbooks roles AWX/Tower) Python/Shell scripting

CI/CD/SCM: GitHub Enterprise administration GitHub Actions branch protection rules

Containers: Docker (build/security scanning) Kubernetes (deployment networking storage)

Web Servers: Apache Nginx (configuration SSL reverse proxy)

Monitoring: Prometheus Grafana ELK or commercial tools (Datadog/New Relic)

Code Security: SAST/DAST tools (SonarQube Snyk Checkmarx)

• Strong communication and documentation skills.

• Ability to mentor junior engineers and conduct technical interviews.

• Collaborative mindset with DevOps/DevSecOps philosophy.

• Calm under pressure during incidents; drive for continuous improvement.

XTIUM is an equal opportunity employer.