# Sample Web App

Classic 3-tier SaaS on AWS — rendered by Archify

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Inspecting compiled semantics

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### Edge

- • CloudFront CDN fronts all traffic
- • S3 serves static assets via OAI

### Application

- • FastAPI behind an HTTPS load balancer
- • Redis read-through cache
- • Async work drained from SQS by a worker

### Security

- • OAuth 2.0 with JWT + PKCE
- • API + LB isolated in a security group