Khairul Islam
DevOps Engineer | Cloud Infrastructure | Infrastructure Support
Infrastructure-focused engineer with hands-on experience designing secure, scalable, and highly available cloud environments — with a steady focus on production monitoring, enterprise networking, Linux administration, and keeping systems reliable without letting costs run away.
What I actually work on
Grouped by where each competency sits in the infrastructure lifecycle — not a list of buzzwords.
Cloud & Infrastructure Design
Cloud Infrastructure Design · High Availability Architecture · Capacity Planning · Disaster Recovery Planning
Networking & Security
Enterprise Networking · Infrastructure Security
Linux & Operations
Linux System Administration · Operational Excellence · Technical Problem Solving · Infrastructure Documentation
Monitoring & Incident Response
Infrastructure Monitoring · Incident Management · Root Cause Analysis (RCA)
Performance & Cost
Infrastructure Optimization · Cloud Cost Optimization · Performance Optimization
How I approach infrastructure
I'm an infrastructure-focused engineer with hands-on experience designing secure, scalable, and highly available cloud environments. I care about production monitoring, enterprise networking, and Linux administration — and about keeping systems performant and secure without letting operational cost creep up. The goal is always the same: infrastructure that stays up, stays safe, and stays affordable as it grows.
Reliability and uptime first
Design decisions get evaluated against maximum uptime and service reliability before anything else.
Security by design
Layered network segmentation and least-privilege access control belong in the architecture, not bolted on afterward.
Cost-aware architecture
Right-sizing workloads and eliminating unused resources is part of the design process, not a cleanup task.
Document and standardize
Technical documentation and infrastructure standards make operations repeatable instead of tribal knowledge.
Watch, then act
Continuous monitoring and root cause analysis come before recommending a fix — not after something breaks twice.
Where I'm applying this
Cloudly InfoTech Limited
- Designed scalable, secure, and highly available cloud infrastructure to support business growth while ensuring maximum application uptime and service reliability.
- Planned production-ready network architectures with efficient CIDR allocation, subnet segmentation, routing strategies, and security controls to build reliable enterprise environments.
- Optimized infrastructure utilization by identifying unused resources, rightsizing workloads, and recommending cost-effective cloud improvements.
- Improved infrastructure resilience through high availability design principles and fault-tolerant architecture recommendations.
- Monitored production environments proactively to identify infrastructure bottlenecks before customer impact.
- Strengthened infrastructure security by implementing layered network segmentation, least-privilege access control, and secure communication practices across production environments.
- Evaluated existing infrastructure and proposed modernization strategies to improve scalability, operational efficiency, long-term maintainability, and future business expansion.
- Supported continuous production monitoring by analyzing infrastructure health, server performance, application metrics, and operational trends to proactively detect and resolve potential issues.
- Investigated production incidents, prepared Root Cause Analysis (RCA) reports, and documented preventive actions to reduce recurring operational problems and improve service stability.
- Recommended infrastructure improvements that increased system performance, optimized resource utilization, enhanced security posture, and reduced unnecessary cloud expenditure.
- Developed technical documentation, operational reports, infrastructure standards, and implementation guidelines to improve operational consistency and knowledge sharing.
- Contributed to building resilient infrastructure capable of supporting high user traffic while maintaining performance, availability, and business continuity under increasing workloads.
- Reduced infrastructure costs by identifying unused resources, eliminating unnecessary cloud consumption, and recommending cost-efficient architecture improvements while maintaining production performance.
- Assisted in evaluating business requirements and recommending scalable, secure, and cost-effective infrastructure architectures aligned with operational and future growth objectives.
What I've built
Production Cloud Infrastructure Architecture
Designed a production-ready cloud infrastructure with structured IP planning, secure network segmentation, high availability, fault tolerance, and future scalability to support enterprise business applications.
Enterprise Multi-Network Connectivity
Designed secure communication between isolated production environments using centralized routing principles while maintaining security, network isolation, and operational efficiency.
Containerized Enterprise Application Platform
Implemented a containerized application platform to improve deployment consistency, simplify application management, and enhance portability across environments.
High Availability Cluster Deployment
Designed a resilient clustered application hosting environment capable of distributing workloads efficiently while improving fault tolerance and application availability.
Deployment Automation Pipeline
Built an automated deployment workflow to reduce manual intervention, improve deployment consistency, and accelerate software delivery processes.
Production Monitoring & Observability
Implemented centralized infrastructure monitoring to provide real-time visibility into server health, resource utilization, application performance, and operational trends.
Cloud Infrastructure Cost Optimization
Performed infrastructure assessments to identify underutilized resources, improve utilization efficiency, reduce unnecessary cloud spending, and recommend cost-effective architectural improvements.
Education, certifications & the full CV
Full resume, ready to download
The PDF mirrors everything on this page — professional summary, experience, projects, education, and certifications.
// education
- B.Sc. in Computer Science & Engineering Sonargaon University
// certifications
- DevOps KodeKloud
- Networking KodeKloud
Let's build reliable infrastructure.
Agargaon, Dhaka — open to DevOps and infrastructure roles.