# Roadmap A visual map of the 8 levels and 75 chapters. Each level is independently shippable. --- ## 🟢 Beginner Track — L0 through L3 > **Zero to Real API.** You'll understand the internet, build your first Express server, design databases, and implement production-grade authentication. By the end of L3, you can build and secure a complete REST API. > **~36 chapters + 2 projects · ~60 hours** ```mermaid flowchart TD A[L0 — Internet & Programming Foundations
7 chapters] --> B[L1 — Backend Fundamentals
10 chapters + P1] B --> C[L2 — Databases Deep Dive
10 chapters] C --> D[L3 — Authentication & Security
9 chapters + P2] style A fill:#dbeafe,stroke:#3b82f6 style B fill:#dbeafe,stroke:#3b82f6 style C fill:#dbeafe,stroke:#3b82f6 style D fill:#dbeafe,stroke:#3b82f6 ``` --- ## 🔴 Advanced Track — L4 through L7 > **Professional to Senior.** You'll master architecture patterns, scale systems to millions of users, deploy with Docker and CI/CD, and integrate AI into your backends. By the end of L7, you can design, scale, and deploy production systems. > **~39 chapters + 5 projects · ~80 hours** ```mermaid flowchart TD E[L4 — Advanced Backend
10 chapters + P3,P4] --> F[L5 — Scaling & Production
8 chapters + P5] F --> G[L6 — DevOps & Deployment
8 chapters + P6] G --> H[L7 — AI + Modern Backend
6 chapters + P7] style E fill:#fee2e2,stroke:#ef4444 style F fill:#fee2e2,stroke:#ef4444 style G fill:#fee2e2,stroke:#ef4444 style H fill:#fee2e2,stroke:#ef4444 ``` --- ## Full Flow ```mermaid flowchart TD A[L0 — Internet & Programming Foundations
7 chapters] --> B[L1 — Backend Fundamentals
10 chapters + P1] B --> C[L2 — Databases Deep Dive
10 chapters] C --> D[L3 — Authentication & Security
9 chapters + P2] D --> E[L4 — Advanced Backend
10 chapters + P3,P4] E --> F[L5 — Scaling & Production
8 chapters + P5] F --> G[L6 — DevOps & Deployment
8 chapters + P6] G --> H[L7 — AI + Modern Backend
6 chapters + P7] style A fill:#dbeafe,stroke:#3b82f6 style B fill:#dbeafe,stroke:#3b82f6 style C fill:#dbeafe,stroke:#3b82f6 style D fill:#dbeafe,stroke:#3b82f6 style E fill:#fee2e2,stroke:#ef4444 style F fill:#fee2e2,stroke:#ef4444 style G fill:#fee2e2,stroke:#ef4444 style H fill:#fee2e2,stroke:#ef4444 ``` ## Difficulty curve - **🟢 Beginner Track (L0–L3)** — assumes zero. Heavy use of analogies. Build a real API by the end. ~36 chapters + 2 projects. - **🔴 Advanced Track (L4–L7)** — assumes L3. Architecture decisions, distributed systems, DevOps, AI integration. ~39 chapters + 5 projects. ## Projects | # | Project | Level | Stack | |---|---------|-------|-------| | P1 | Notes / Todo API | L1 | Node + Express + Postgres | | P2 | Complete Auth System (JWT + refresh + RBAC) | L3 | Node + Postgres + Redis | | P3 | E-commerce backend (cart, checkout, inventory) | L4 | Node + Postgres + Redis | | P4 | Chat backend (rooms, presence, history) | L4 | Node + WebSockets + Redis | | P5 | Scalable SaaS backend (multi-tenant) | L5 | Postgres replication + queues | | P6 | Full deployment pipeline (CI → Docker → cloud) | L6 | GH Actions + Docker + Nginx | | P7 | AI-powered backend with RAG | L7 | Node + pgvector + LLM SDK | Each project ships with a complete codebase, a runbook, and an architecture-decision record (ADR).

Course Roadmap

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