Secure VPC Multi-Tier Architecture

Overview

Secure VPC Multi-Tier Architecture is positioned as a portfolio-grade case study focused on production-oriented engineering practices in cloud / aws architecture.

Problem Statement

Publicly exposed workloads increase risk and violate enterprise network isolation expectations.

Architecture

The architecture is designed for clear separation of concerns, secure boundaries, and growth under higher traffic/usage scenarios.

Tech Stack

VPC, Public/Private Subnets, IGW, NAT Gateway, Bastion Host, Security Groups, NACLs

Features

• Role-aware workflow design
• Secure access boundaries and data handling
• Modular components for scale and maintainability
• Observability-minded service interactions

Architecture Diagram

See diagrams/three-tier-vpc-architecture.mmd.

System Design Decisions

Enforced strict subnet segmentation and controlled admin ingress through a bastion pattern.

Engineering Challenges Solved

Validated route-table and CIDR policy correctness while enabling secure private resource access.

Setup Instructions

1. Clone the repository.
2. Review docs in docs/ and architecture notes in �rchitecture/.
3. Implement or plug in project-specific services under src/.

Future Improvements

See future-work.md.