Enterprise DevOps & Cloud Infrastructure
Virtualization cluster administration (VMware ESXi), containerized service delivery (Docker), and automated DR pipelines for 100k+ users.
Engineering Overview
Administered and automated production VMware ESXi hypervisors, containerized microservices, and network infrastructure at Khademan Emam Zaman (shamim313.com) and Part Software Group.
Key Contributions & Achievements
- High-Availability Cluster Operations: Maintained multi-node VMware ESXi production environments hosting ~10 production VMs serving over 100,000 registered users with zero unplanned downtime.
- Docker Containerization: Containerized 5+ core backend services, standardizing environments and reducing release deployment times by approximately 10%.
- Disaster Recovery & Automation: Implemented automated snapshot and backup pipelines with Veeam and Bash scripting, saving 3–4 engineer hours weekly and mitigating configuration drift.
- VoIP Telephony: Maintained zero-downtime operation for 6+ months on enterprise FreePBX VoIP telephony supporting 20+ staff extensions.
- Storage & Security Policies: Managed TrueNAS ZFS storage arrays (1–10 TB) with automated snapshot schedules, firewall access control lists, and network segmentation.
Tech Stack
VMware ESXi Docker Docker Compose Bash TrueNAS ZFS Veeam FreePBX Ubuntu Server