Mostafizur Rahman

Backend & DevOps Engineer

Building resilient scalable systems and cloud infrastructure. Focused on performance, reliability, and clean architecture at scale.

Nest js Node.js Fast API Go Docker Kubernetes AWS Terraform
Mostafizur Rahman

Tech Stack

Languages

  • Go
  • Node.js
  • TypeScript

Frameworks

  • NestJS
  • Express
  • Gin
  • Fiber

Databases

  • PostgreSQL
  • MongoDB
  • Redis

Message Brokers

  • Kafka
  • RabbitMQ
  • NATS

Orchestration

  • Kubernetes
  • EKS / GKE / AKS

CI/CD & GitOps

  • ArgoCD
  • GitHub Actions
  • GitLab CI

Infrastructure

  • Pulumi
  • AWS CDK
  • Terraform

Observability

  • Prometheus
  • Loki
  • Grafana

Security

  • OAuth2
  • JWT

DevOps Projects

Featured

Full-Stack Todo App — Deployed on AWS EKS

A production-ready full-stack Todo application deployed on AWS EKS. The architecture features a React.js frontend served via Nginx, a Flask REST API backend, and a PostgreSQL database — fully containerized with Docker and orchestrated using Kubernetes manifests. External access is handled via an AWS LoadBalancer with Nginx reverse proxy routing frontend traffic and proxying API requests to the backend.

Architecture Flow
⚛ React
→
🐍 Flask
→
🐳 Docker
→
☸ EKS
→
⚖ AWS LB
▲
Full-Stack Architecture React.js + Flask + PostgreSQL — fully decoupled, containerized layers with Nginx reverse proxy
▲
Orchestration on AWS EKS Deployment lifecycle automated using Kubernetes manifests and eksctl with managed node groups
▲
Multi-Replica & Health Checks Liveness and readiness probes ensuring zero-downtime rollouts and auto-recovery
▲
Secure Config Management Credentials via Kubernetes Secrets and Nginx config via ConfigMap
React.js Flask PostgreSQL Docker AWS EKS Kubernetes Nginx AWS LoadBalancer
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EKS Auto Mode Cluster Provisioning

Production-grade Kubernetes cluster on AWS EKS Auto Mode using Terraform. Includes VPC with public/private subnets, managed node groups, IAM IRSA, and cluster autoscaler configuration.

📜 Terraform
→
☁ AWS VPC
→
☸ EKS
→
⚙ Node Groups
Terraform AWS EKS Kubernetes IAM
◆

GitOps Deployment with ArgoCD

Implemented GitOps workflow using ArgoCD for continuous delivery. App-of-apps pattern with Helm charts, automated sync policies, and rollback capabilities for multi-environment deployments.

📂 Git Repo
→
⚓ ArgoCD
→
⎈ Helm
→
☸ K8s
ArgoCD Helm Kubernetes GitOps
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Observability Stack — Prometheus + Grafana

Deployed a full observability platform using kube-prometheus-stack. Custom dashboards for service SLOs, Loki for log aggregation, and Alertmanager for PagerDuty/Slack alerting.

☸ K8s
→
📊 Prometheus
→
📈 Grafana
→
🔔 Alerts
Prometheus Grafana Loki Alertmanager
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Multi-Service Kafka Event Pipeline

Designed an event-driven microservices architecture using Kafka as the backbone. Producer/consumer services in Go with schema registry, dead-letter queues, and consumer group rebalancing.

📤 Producers
→
📨 Kafka
→
📥 Consumers
→
⚠ DLQ
Kafka Go Docker Microservices
◆

Pulumi IaC — Cloud Infrastructure Automation

Infrastructure automation with Pulumi using TypeScript. Covers multi-region AWS deployments: ECS services, RDS clusters, S3/CloudFront, and secrets management with AWS Secrets Manager.

📘 TypeScript
→
⚡ Pulumi
→
☁ AWS
→
🐳 ECS
Pulumi TypeScript AWS ECS
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DevSecOps CI/CD Pipeline

10-stage GitHub Actions pipeline with integrated security gates: Trivy image scanning, Semgrep SAST, Checkov IaC linting, OWASP dependency audit, and automated SBOM generation.

📂 Git Push
→
⚙ GitHub Actions
→
🔒 Security
→
🚀 Deploy
GitHub Actions Trivy Semgrep OWASP

Backend Projects

Featured

ZAAG Shop (Multi-Tenant E-commerce SaaS)

  • Built a multi-tenant e-commerce SaaS platform enabling multiple vendors to create and manage independent online stores.
  • Implemented backend modules for product management, order processing, and checkout using a modular NestJS architecture.
  • Optimized backend performance of an e-commerce system by 39% using in-memory caching for high-demand endpoints such as product pages and user sessions.
Architecture Flow
👤 Client
→
🔷 NestJS API
→
⚡ Redis
→
🐘 PostgreSQL
NestJS PostgreSQL Redis

Sheba-Plus

  • Developed an online shopping platform where users can hire agents to purchase products on their behalf.
  • Integrated Zoom-based communication for real-time interaction between users and shopping agents.
  • Contributed to backend services for order workflows and data management.
Architecture Flow
👤 Client
→
🔷 NestJS API
→
🐘 PostgreSQL
↔
📹 Zoom
NestJS PostgreSQL

Live Chat System

  • Developed a real-time customer support chat system connecting users with available support agents.
  • Implemented intelligent queue-based agent assignment using NATS JetStream for efficient message distribution.
  • Designed waiting-state handling to notify users when agents are unavailable, improving customer experience.
Architecture Flow
👤 Client
→
🔷 NestJS API
→
📨 NATS JetStream
→
👨‍💼 Agents
NestJS PostgreSQL NATS JetStream

Palooi

  • Built a full-featured e-commerce platform including cart management, order processing, and guest checkout.
  • Integrated Stripe payment gateway to support secure online transactions.
  • Designed backend services to handle product catalogs, order lifecycle, and customer operations.
Architecture Flow
👤 Client
→
🟢 Express API
→
🍃 MongoDB
↔
💳 Stripe
Node.js Express.js MongoDB

Education & Publications

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Education

Green University of Bangladesh

B.Sc. in Computer Science and Engineering

Jan 2020 – Jan 2024

CGPA: 3.23 / 4

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Publications

Pneumonia Detection from Chest X-Ray Images Using Convolutional Neural Network

ieeexplore.ieee.org/document/10499549

Currently Forging

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Distributed Systems and Deployment

Deep diving into distributed architectures, consensus algorithms, and scalable deployment strategies.

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System Design

Studying high-level system design, scalability patterns, and designing robust, large-scale backend systems.

Get in Touch

GitHub Email LinkedIn