In the previous articlehttps://www.aniksikder.me/articles/networking/how-does-one-server-find-another-server-dns-private-dns-and-service-discovery-explained, we answered a fundamental question: > How does one server find another server? We explored...

Hey developers! 👋 Welcome back to our networking and infrastructure deep-dive series. In the previous articlehttps://www.aniksikder.me/articles/networking/internet-free-infrastructure-how-two-servers-talk-without-using-the-internet we learned some...

Imagine you're building a SaaS platform. Nothing unusual. A web application. A PostgreSQL database. A Redis cache. Everything runs in the cloud. The architecture looks something like this: Users ↓ Application Server ↓ PostgreSQL Simple. ...

Hey developers! 👋 Welcome back to the journey from business requirements to production-ready systems. A founder walks into a development team and says: > "We need an ERP." Sounds simple. Until you start asking questions. Where should users live...

Imagine you're building a SaaS platform. Nothing unusual. Just an employee management system. The client says: > "We need employee management." A developer says: > "Sure. I'll build employee CRUD." So the implementation begins. Employee ↓ ...

Modern software products are API-driven businesses. Whether building SaaS platforms, ERP systems, marketplaces, mobile applications, or internal enterprise software, nearly every business operation eventually becomes an API request. Customers place...

In the previous articlehttps://www.aniksikder.me/articles/networking/dns-record-types-explained, we explored: How DNS works How DNS records power websites, email systems, and cloud infrastructure At this point, a natural question em...

In the previous articlehttps://www.aniksikder.me/articles/networking/dns-explained-complete-guide, we explored how DNS translates human-friendly domain names into machine-friendly IP addresses and how a request travels through recursive resolvers, ro...

Most people don’t think about DNS until something breaks. A founder launches a new website and suddenly email stops working. A developer migrates infrastructure and traffic starts disappearing. A marketing team changes a domain setting and the web...

When an online order is placed, the customer sees a simple message: > "Your order has been confirmed." Behind that message, however, an entire chain of events begins. The inventory must be updated. The payment must be recorded. The customer shou...

For years, the web operated on a simple principle: Browser asks. Server answers. Connection closes. This model worked perfectly when websites were mostly documents. A user opened a page. The browser requested data. The server responded. Everyo...

Most developers use Request-Response every day. Few stop to think about what actually happens after clicking a button. You open an app. You tap "Login". A response appears almost instantly. Simple, right? Not exactly. Behind that seemingly sim...