Md. Hafizur Rahman

System & Cloud Engineer

RHCSA & AWS Certified Cloud Engineer with 5.5+ years of experience architecting and maintaining high-availability systems in both on-premise and cloud environments. Specialized in automating infrastructure delivery with Terraform and Ansible, and orchestrating containerized applications with Kubernetes. Proven ability to reduce operational costs and improve system reliability through strategic automation and monitoring.

Hire me
5+ years exp.
2 vendor certs
12+ projects

Core expertise

Cloud · Linux · automation · orchestration

AWS

EC2, VPC, S3, IAM, CloudFront, RDS, Lambda

Linux / RHEL

RHCSA, RHEL, CentOS, Ubuntu, SELinux

Kubernetes

EKS, Pods, Deployments, Ingress, Helm, GitOps

IaC

Terraform, Ansible, CloudFormation

Monitoring

Prometheus, Grafana, Nagios, Cacti

Technical Toolbox

A detailed look at my daily tools and technologies

Cloud & IaC

  • AWS (EC2, VPC, S3, RDS, IAM, Lambda)
  • Terraform / OpenTofu
  • AWS CloudFormation
  • Ansible (Automation & Config Mgmt)

CI/CD & Automation

  • Jenkins, GitLab CI
  • GitHub Actions
  • Git (GitHub, GitLab)
  • Python, Bash Scripting

Containers & Orchestration

  • Kubernetes (EKS, K8s)
  • Docker, Podman
  • Helm, Kustomize
  • ArgoCD (GitOps)

Monitoring & Logging

  • Prometheus, Grafana
  • ELK Stack / Loki
  • Nagios, Cacti
  • AWS CloudWatch

Experience

Network operations · cloud engineering · measurable results
2024 – now

Engineer Network Operations

Genuity Systems Ltd. · Dhaka
Managing large-scale network and cloud infrastructure, ensuring high availability, and automating operational tasks with Ansible and Python.
Reduced incident response time by 25% through automated Ansible playbooks
AWS Ansible Linux
2023 – 2024

Support Engineer NOC (A2P SMS)

Infozillion Teletech BD Ltd. · Dhaka
Operated and maintained A2P SMS platform infrastructure, monitored systems via Grafana/Prometheus, and resolved critical incidents.
Maintained 99.9% platform uptime for 10M+ messages/day
Grafana Prometheus Linux
2021 – 2023

Support Engineer NOC (ISP)

Tuhin Enterprise · Dhaka
Managed ISP core network, Linux servers, virtualization (VMware, Proxmox), and implemented monitoring solutions.
Maintained 99.9% platform uptime for 5K+ users.
VMware Proxmox Nagios
2020 – 2021

Jr. Support Engineer NOC

Amarnt System (Central Zone ISP) · Dhaka
Provided first-line support, configured network devices, and maintained Linux-based infrastructure.
Maintained 99.9% platform uptime for 3K+ users. Linux Networking

Vendor certifications & training

Official vendor certifications · specialized training · click to verify

RHCSA

Red Hat Certified System Administrator
Red Hat Certified Verify

AWS Certified Solutions Architect

Amazon Web Services (Associate)
AWS Certified Verify

RHCE

Linux Pathshala · 4 months
Red Hat Training Verify

CKA

bongoDev · 2 weeks (day-long)
Kubernetes Training Verify

CCNA

New Horizon Computer Learning Center · 3 months
Cisco Training Verify

IT Support Technician

Sherpur Technical School & College · 4 months
IT Training Verify

Key projects

Cloud, Kubernetes & automation with measurable outcomes

AWS HA Infrastructure

Challenge: Manual infrastructure provisioning was slow and error-prone.
Solution: Designed and deployed highly available architecture using EC2, Auto Scaling, Load Balancers, VPC, and S3 with Terraform for IaC.
Result: Achieved 99.95% SLA with full environment rebuilds in under 15 minutes.

AWS Terraform Auto Scaling
View on GitHub

K8s GitOps with ArgoCD

Challenge: Slow and inconsistent deployment processes.
Solution: Implemented GitOps workflow using ArgoCD for a 3-tier application on Kubernetes with Ingress and Persistent Volumes.
Result: Reduced deployment time by 40% and enabled automatic rollbacks on failure.

Kubernetes ArgoCD Helm
View on GitHub

Monitoring Stack with Prometheus

Challenge: No visibility into system health and performance.
Solution: Built real-time dashboards and alerting using Grafana and Prometheus, integrated with AWS and on-premise systems.
Result: Proactively identified 90% of potential system bottlenecks before user impact.

Grafana Prometheus AWS CloudWatch
View on GitHub

Let's work together

hafizurrahman.cse2000@gmail.com

+880 1733-659094

Dhaka, Bangladesh