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Understanding TLS as a Backend Engineer

3d ago · 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

SKShubham Kumar Singhblog.realdev.club

Building a Paytm-Style Payments Backend with Bun, TypeScript, Express & MongoDB Transaction

3d ago · 32 min read · Digital wallets have become a part of everyday life. We transfer money to friends. We split bills. We pay merchants. We check balances before making payments. But behind every wallet application lies

Understanding Symmetric vs Asymmetric Encryption as a Backend Engineer

4d ago · 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

5d ago · 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

MPMrunali Parsekarmrunaliparsekar.hashnode.dev

Building Real-Time Notifications with Django Channels ⚡

May 27 · 4 min read · Recently, I worked on implementing a real-time notification system in a Django application where the UI needed to update instantly whenever something changed in the system. Things like: approvals st

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

What is a Programming Language?

May 23 · 7 min read · Story Time Imagine you walk into a small café in a country where you don’t speak the local language and you want coffee. You might try “Coffee, please.” and the waiter just stares. You try again, mayb

SKShubham Kumar Singhblog.realdev.club

Building a ShelfLife Household Inventory Tracker - Backend

May 19 · 38 min read · In many shared households, managing groceries becomes messy over time. Multiple people live together, Everyone buys food Items get stored in different places Expiry dates are ignored Food gets was

MPmanu panjoriamanu-panjoria.hashnode.dev

When Microservices Networking Becomes Chaos

May 17 · 10 min read · At small scale, microservices feel simple. A load balancer. A few APIs. Some Docker containers. Everything works. But once systems grow to hundreds of services and millions of requests, networking its