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Understanding NAT as a Backend Engineer

2d ago · 6 min read · After learning about TCP, HTTP, TLS, and encryption, the next networking concept I wanted to understand was NAT. I had always known that my laptop gets a private IP address from the router. Something

APAyush Patilblog.ayushpatil.in

Database Scaling Made Simple: Understanding Read Replication and Data Sharding

5d ago · 6 min read · As applications grow, so does the amount of data they need to handle. What works perfectly for a small startup may start slowing down when thousands or millions of users begin using the application. T

SKSreeram K Scode-as-a-story.hashnode.dev

What is CSP (Content Security Policy)?

5d ago · 4 min read · Story Time Imagine you’re managing a high security office building, for example, Reserve Bank of India (RBI) Headquarters. Every day, different type of people try to enter this building including empl

APAyush Patilblog.ayushpatil.in

Scaling Applications: Vertical Scaling vs Horizontal Scaling Explained Simply

6d ago · 5 min read · If you've ever hosted a party at home, you've already encountered a scaling problem. Imagine you planned for 10 guests, but suddenly 50 people showed up. You now need more chairs, more food, and more

Understanding TLS as a Backend Engineer

Jun 1 · 6 min read · After learning about HTTP, TCP, and encryption, the next topic I wanted to understand was TLS. I use HTTPS every day. I call HTTPS APIs. I deploy backend services behind HTTPS. But until recently, I c

Understanding Symmetric vs Asymmetric Encryption as a Backend Engineer

Jun 1 · 6 min read · While learning networking, I kept hearing terms like: HTTPS TLS SSL certificates Public keys Private keys I understood they were related to security, but I never really understood how encryptio

Understanding HTTP as a Backend Engineer

May 30 · 7 min read · After learning about the OSI model, TCP, and UDP, the next thing I wanted to understand was HTTP. As backend engineers, we work with HTTP every day. We build APIs. We send requests. We receive respons

Understanding TCP and UDP as a Backend Engineer

May 29 · 6 min read · After learning about the OSI model, I started exploring Layer 4 of networking where TCP and UDP live. At first I thought: “Protocols are probably just low-level networking details.” But the more I lea

Understanding the OSI Model as a Backend Engineer

May 28 · 5 min read · I recently started learning more about networking fundamentals to become a better backend engineer, and the OSI model finally started making practical sense to me. Before this, an API request felt sim

SKSreeram K Scode-as-a-story.hashnode.dev

DNS - Domain Name System

May 28 · 5 min read · Story Time Imagine this, it’s 9:30 PM, you’ve had a long day. You’re tired and cooking is not happening today. So you pick up your phone and think “Let’s order from KFC.” You don’t know the exact bran