In this video, I discuss the path of becoming a backend engineer through concepts and fundamentals. These are not tools ? these are backend concepts and fundamentals technologies.    - Communication Protocols 3:30     - TCP,UDP     - QUIC     - HTTP     - WebSockets     - gRPC - Web Servers 8:40     - How web servers work?     - Dynamic vs Static Content     - E-Tags      - HTTP protocol  - Database Engineering 11:00     - Relational vs NoSQL     - ACID - Proxies (Reverse Proxies, Load balancer) 13:31     - What is difference between Proxy vs Reverse Proxy     - Layer 7 Proxy vs Layer 4 Proxy      - Reverse Proxy applications     - Load Balancing algorithms  - Caching 15:40     - When to use Caching - Message queue, Pub/Sub 16:36     - When to use PubSub messaging first queue.  - Web Frameworks (API authoring) 18:30     - Express, Django, Node JS  - Message Formats (JSON, protobuf) 19:24     - JSON & protobuf  - Security 20:50     - TLS, Encryption, Firewalls