Aamir Ali

Linux Systems Engineer and Hosting Infrastructure Specialist with 8+ years of deep, hands-on expertise managing enterprise Linux server environments, web hosting platforms, and mission-critical production systems.

Subject Matter

Expert (SME) in Linux server administration across RHEL, CentOS, Ubuntu, and Debian distributions — covering everything from bare-metal provisioning and kernel tuning to firewall hardening, DNS management, and SSL lifecycle management. Extensive experience operating cPanel/WHM, Plesk, and other control panels at scale, supporting shared hosting, VPS, and dedicated server environments for thousands of end users. Complementary skills in AWS cloud infrastructure, Docker containerization, and CI/CD automation allow seamless delivery of hybrid and cloud-integrated hosting solutions.

Known for methodical root cause analysis, rapid incident resolution, and building stable, secure, high-availability Linux environments.

Linux Administrator / Hosting Engineer - Infinitive Host Technologies

(2022-02)

• Administered and maintained a fleet of 50+ Linux production servers (CentOS, Ubuntu, RHEL) running enterprise hosting environments — ensuring 99.9%+ uptime through proactive monitoring, capacity planning, and rapid incident response.
• Managed cPanel/WHM hosting infrastructure at scale — including shared hosting, VPS, and reseller accounts — handling provisioning, migrations, account troubleshooting, email server configuration (Exim/Dovecot), and WHM cluster management.
• Configured and optimized Nginx and Apache web servers for high-traffic environments, including SSL/TLS termination, reverse proxy setup, virtual host configuration, and performance tuning for Python, Node.js, PHP, and Java applications.
• Managed DNS zones and nameserver configurations (BIND, cPanel DNS) for hundreds of domains, handling propagation issues, SPF/DKIM/DMARC records, and DNS-based failover setups.
• Secured Linux servers by implementing CSF firewall rules, SSH hardening, fail2ban brute-force protection, regular security audits, and automated patch management.
• Managed full SSL/TLS lifecycle — issuing, installing, and auto-renewing certificates via Let's Encrypt (Certbot) and cPanel AutoSSL for hundreds of customer domains.
• Configured and maintained AWS infrastructure (EC2, RDS, VPC, S3, CloudFront) to support cloud-integrated hosting and client application deployments.
• Designed and deployed RTMP Nginx and Ant Media Server streaming infrastructure with HLS output, adaptive bitrate delivery, and stream failover for live broadcasting clients.
• Containerized applications using Docker for consistent, portable deployments; managed Kubernetes clusters for scalable container orchestration.
• Built and maintained Zabbix and Nagios monitoring — custom dashboards, host/service checks, and alerting policies that significantly reduced Mean Time to Detection (MTTD) and Mean Time to Resolution (MTTR).
• Authored Bash automation scripts for routine operations — backup jobs, certificate renewals, disk usage alerts, cron scheduling, and bulk server configuration tasks — eliminating hours of manual work weekly.

Technical Support Engineer - ST Infosys

(2021-02 - 2022-02)

• Delivered L2/L3 remote support for Linux and Windows server environments across enterprise clients, diagnosing and resolving complex hosting, DNS, networking, and application issues under strict SLA constraints.
• Managed Active Directory user accounts, group policies, and Microsoft Office 365 services for organizations with 200+ users.
• Resolved production incidents involving web hosting failures, SSL certificate errors, DNS propagation delays, firewall misconfigurations, and server performance degradation.
• Documented recurring issues and created internal runbooks, reducing average resolution times for common Linux and hosting problems.

Linux Administrator - Dreamsoft4u Pvt. Ltd.

(2019-01 - 2020-06)

• Administered Linux hosting servers for a portfolio of web applications — managing Apache and Nginx configurations, virtual hosts, SSL certificates, and application-specific tuning for performance and reliability.
• Maintained AWS infrastructure (EC2, RDS, S3) for production client environments, handling instance management, storage configuration, and connectivity troubleshooting.
• Conducted regular Linux performance audits — analyzing CPU, memory, and I/O bottlenecks using sar, vmstat, iostat, and top — and applied kernel-level and web server tuning to reduce page load times.
• Managed MySQL and PostgreSQL databases including backup/restore, replication setup, and slow query analysis.

Technical Support Engineer - Metacube Software Pvt. Ltd.

(2018-05 - 2019-01)

• Provided technical support for Linux and Windows application environments, troubleshooting deployment failures, web server misconfigurations, and service outages.
• Collaborated with development teams to resolve environment-related issues, improving deployment consistency and reducing production incidents caused by server misconfiguration.
• Supported Linux server setup and maintenance tasks including user management, cron jobs, log analysis, and service restarts.

System Administrator - Dotsquares Technologies

(2015-12 - 2018-05)

• Managed Linux hosting infrastructure for a large portfolio of client websites — handling server provisioning, Apache/Nginx configuration, virtual hosting, DNS zone management, and CSF/iptables firewall configuration.
• Administered MySQL and database services, managing user privileges, backups, and basic query optimization for hosted web applications.
• Implemented and maintained backup solutions using rsync and cron-scheduled jobs, ensuring data integrity and enabling reliable disaster recovery for client environments.
• Managed SSL certificate installation and renewals across multiple client domains, enforcing HTTPS and troubleshooting mixed-content and certificate chain issues.
• Deployed and configured monitoring using Nagios — set up host and service checks, email alerting, and uptime dashboards across the server fleet.