AWS Scalable Web App Architecture

Click Here to check the architecture diagrams and complete case study(GITHUB)

The Goal

Design a highly available, fault-tolerant, and scalable web infrastructure on AWS — the kind of architecture you’d expect from a production-ready application that can handle real-world traffic, failures, and spikes.

The Problem

Modern web applications need to stay up — no matter the traffic load or server failure. Manually managing uptime and scaling is inefficient and error-prone. This project was built to showcase how AWS native tools can automate and scale a full-stack deployment with ease and reliability.

What I Built

A complete, production-grade deployment architecture with:

• 🖥️ Amazon EC2 instances running a web app

• 📶 Elastic Load Balancer (ALB) distributing traffic

• 🔁 Auto Scaling Group to automatically add/remove servers

• 🌐 Route 53 for DNS + failover routing

• 🔒 Security Groups + IAM roles for secure infrastructure

Everything is deployed across multiple Availability Zones to ensure true fault tolerance.

Tech Stack

• AWS EC2 for compute

• Auto Scaling Groups for elasticity

• Application Load Balancer for routing

• Route 53 for DNS + health checks

• Amazon CloudWatch for monitoring

• Amazon S3 (optional) for static asset delivery

• IAM for secure access control

Architecture Overview

• User requests come through Route 53 (DNS)

• Traffic is routed to the ALB, which checks for healthy EC2 instances

• If demand spikes, Auto Scaling spins up more EC2s

• If an instance fails, it’s automatically replaced

• Everything is distributed across multiple AZs for high availability

What I Learned

This project helped me understand:

• How to architect for availability, resiliency, and performance

• The relationship between networking, compute, and DNS

• The importance of designing cloud-native systems from Day 1

Why It Matters

Whether you're deploying a portfolio site or a full SaaS product, cloud infrastructure should never be the bottleneck. This project reflects real-world readiness — the kind of system that just works, even when traffic surges or a server goes down.

Next Steps:

I plan to expand this project by integrating:

• CI/CD with CodePipeline + CodeDeploy

• SSL/TLS with ACM

• S3 + CloudFront for hybrid static + dynamic apps

• RDS for database-backed apps

Built With:

Python • AWS CLI • EC2 • ALB • ASG • Route 53 • IAM • VPC • CloudWatch