Senior Infrastructure & DevOps Engineer

The XTIUM global team is made up of a group of diverse and talented professionals who are all driven by the same goal: excellence and continuous improvement. We are all about embracing challenges, keeping the lines of communication open and working together. We take ownership of our work, focus on learning and growing and hold ourselves accountable to our colleagues and customers. Together, we strive to push boundaries, make an impact and inspire each other to reach our full potential.

Job Description:

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.

What Qualifies You

• 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)

Soft Skills & Cultural Fit

• 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.