Delwar Hossain Himel
DevOps, Cloud & SRE Engineer building secure, scalable hybrid infrastructure.
4.5+ years designing, deploying, and operating enterprise-grade workloads across on-prem datacenters and Microsoft Azure. Strong in CI/CD automation, Kubernetes (AKS), IaC (Terraform), observability, and security-hardened container deployments.
📍 Dhaka, Bangladesh • 📞 +8801777397888 • ✉️ himelmenow@gmail.com
About
Career SummaryHighly skilled and proactive DevOps and Infrastructure Engineer with 4.5+ years of experience designing, deploying, and operating secure, scalable hybrid infrastructures across on-premises datacenters and Microsoft Azure. Experienced in building multi-environment CI/CD pipelines (Dev → Prod) with custom rollout/rollback strategies; operating production AKS clusters with WAF-enabled Application Gateways, KEDA autoscaling, ACR integration, and site-to-site VPN connectivity. Strong focus on reliability, scalability, security, and operational excellence.
Technical Skills
Cloud • IaC • CI/CD • Observability • Platforms
Cloud Infrastructure
Microsoft Azure (AKS, VMs/VMSS, App Gateway/WAF, VPN, Blob Storage, ACR, Recovery Vault)
On-prem Infrastructure
VMware ESXi / vCenter, oVirt Virtualization
OS
RHEL, CentOS, Ubuntu, Windows Server
Containers & Orchestration
Docker, Swarm, Kubernetes, AKS
Infrastructure as Code
Terraform, Ansible (modular IaC, remote state)
CI/CD & GitOps
Jenkins, GitHub, Argo CD, FluxCD
Observability
Istio, Prometheus, Grafana, ELK, Uptime Kuma, ntfy
Databases
MySQL, MariaDB, PostgreSQL, MSSQL, Oracle, MongoDB
Scripting
Bash, Python
Storage
NFS, Samba, GlusterFS, S3, Azure Blob Storage
Mail Services
Postfix, Barracuda Mail Security Gateway, Proxmox Mail Security Gateway
IP Telephony
Asterisk, Issabel, Elastix
Projects
Selected work from your resumeEnterprise-Scale Azure AKS Infrastructure Deployment
Designed, deployed, and operated a production-grade AKS environment for enterprise workloads with high availability, security, automation, and hybrid connectivity across cloud and on-prem data centers.
Key contributions
- 2 AKS clusters + 2 WAF-enabled gateways
- Dev→Prod CI/CD with rollout/rollback strategies
- Event-driven autoscaling with KEDA
- Hybrid site-to-site VPN to 2 datacenters
- Scale: 72 vCPUs • 544 GB RAM
Terraform-Based Azure Infrastructure Automation
Production-grade Terraform solution to provision Azure networking using modular IaC and secure remote state for collaboration across teams.
What it includes
- VNet + subnets + peering
- Hub-and-spoke topology
- VPN configuration for hybrid connectivity
- Reusable modules for teams
GPU-Accelerated Video Encoding Server (SaaS)
Built a dual-NVIDIA GPU encoding platform for hardware-accelerated HLS streaming; delivered as a SaaS solution for a client.
Core features
- GPU workload scaling
- HLS pipeline
- Linux + containerized services
On-Prem High Availability Kubernetes Cluster (Binary Install)
Deployed a fully manual, production-grade Kubernetes cluster on-prem using raw binaries with HA control plane, load balancing, L2 IP allocation, ingress routing, and monitoring.
Architecture
- 3 masters + multi-worker nodes
- HAProxy load balancing
- MetalLB L2 IP allocation
- Ingress routing + monitoring
Secure Docker Deployment for Financial Organizations
Deployed Docker-based ERP workloads on RHEL 9 under strict security compliance, implementing container hardening, namespace isolation, traffic controls, and TLS encryption.
Security focus
- Advanced container hardening
- Blocked inter-container communication
- TLS service-to-service encryption
- Aligned with institutional policies
Professional Experience
Roles & responsibilitiesDevOps Engineer — Apsis Solutions
Dec 2024 – Present
Dhaka, Bangladesh
- Manage and optimize Azure infrastructure (VMs/VMSS, AKS, App Gateway/WAF, Load Balancers, Blob Storage, SSL lifecycle, cost optimization).
- Design and maintain Jenkins CI/CD pipelines for Dev, QA, Staging, UAT, Demo, and Production with rollout/rollback strategies.
- Operate VMware vCenter virtualization across two datacenters for high availability and continuity.
- Implement observability with Prometheus, Grafana, and Uptime Kuma; proactive monitoring and alerting.
- Database operations for MySQL, PostgreSQL, MSSQL, and Oracle (backup, performance tuning, capacity planning).
- Automate workflows using Bash, Python, and Ansible; troubleshoot production incidents and bottlenecks.
Site Reliability Engineer (SRE) — Transworld Mercantile Corporation
Oct 2021 – Nov 2024
Dhaka, Bangladesh
- R&D on open-source software for new product development.
- Deployed and managed Postfix mail servers with Proxmox Mail Gateway.
- Implemented oVirt hypervisor solutions for virtualization and resource optimization.
- Designed storage solutions and backup strategies for HA and disaster recovery.
- Containerized applications using Docker/Kubernetes; improved scalability and deployment efficiency.
- Deployed and managed Asterisk cloud PBX; configured Mikrotik and Cisco routers.
Education
Academic backgroundB.Sc. in Electronic & Telecommunication Engineering — Independent University, Bangladesh
Aug 2017 – Sep 2021 • CGPA: 3.67 / 4.00
Certifications & Courses
Credentials- Azure Administrator Associate (AZ-104)
- Terraform Associate (003) — Udemy
- Certified Kubernetes Administrator (CKA) — Udemy
- Docker Mastery (with Kubernetes + Swarm) — Udemy
- Red Hat Certified System Administrator (RHCSA) — CSL Training
- Cisco CCNA Routing & Switching — CSL Training
- Enterprise Linux Server-1 — CSL Training
Contact
Let’s connectInterested in DevOps / SRE opportunities, consulting, or a quick chat about cloud-native infrastructure.
📍
Dhaka, Bangladesh
Quick message