After conducting research, I have determined that a proficient developer must possess knowledge not only in programming but also in the reasoning behind it. Thus, I have found that it is imperative to understand the fundamental principles of backend development beyond just API frameworks.

Allow me to begin by presenting a comprehensive list of these principles. In future entries, I will delve into each of these topics in greater detail, providing thorough explanations of what I have learned.

These essential principles include:

1. Communication Protocols

2. Web Servers

3. Databases

4. Proxies

5. Caching

6. Messaging Systems

7. Web Frameworks

8. Message Formats

9. Security