Cloud Infrastructure & Architecture

Designing resilient, secure, cost-efficient systems on cloud infrastructure — networking, high availability, and infrastructure as code.

Concepts

VPCs, subnets, and security groups — the building blocks every other cloud topic assumes.

The principle of least privilege, and how roles/policies enforce it instead of relying on long-lived credentials.

Defining infrastructure in version-controlled configuration instead of clicking through a console — reproducible, reviewable, and diffable.

Designing for component failure as the expected case, and the RTO/RPO trade-off that shapes disaster-recovery strategy.