Level 4 · Master Master

Goal: think like an infrastructure architect and an on-call lead — multi- region design, capacity planning, incident response, and patching at scale.

Modules

1. Multi-Region / Multi-AZ Architecture Concepts
2. Capacity Planning
3. Incident Response & Runbooks
4. Security Patching Strategy at Scale
5. Choosing the Right HA Architecture for a Given SLA
6. Cost-Aware Infrastructure Design
7. Compliance & Audit Considerations for Ops
8. On-Call Culture & Escalation Design
9. Platform Engineering & Internal Developer Experience
10. Capstone — Designing a Resilient Global Platform

These modules assume everything from Levels 1-3 (SSH/hardening, nginx/TLS/ CI-CD, HA/DR/IaC) is second nature, and build the organizational and architectural judgment layered on top — capacity math, incident process, compliance, cost, and the capstone's full-platform design exercise.