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What Really Happens When You Type Google.com in Your Browser?
system design

Deep Dives

Comprehensive breakdowns of complex technical challenges.

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How Payment Processing Systems Actually Work Behind the Scenes
system design
May 234 min read

How Payment Processing Systems Actually Work Behind the Scenes

Payment processing systems securely manage online transactions between users, merchants, payment gateways, and banks in real time. A simple “Pay Now” button actually triggers multiple backend operations like authorization, fraud checks, settlement, and transaction validation within milliseconds.

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Understanding HTTP Methods in Real APIs — Industry-Level Guide for Developers
system design
May 224 min read

Understanding HTTP Methods in Real APIs — Industry-Level Guide for Developers

HTTP methods are the foundation of modern APIs and web applications. Every time you open Instagram, place an order on Amazon, watch a YouTube video, or check your bank balance, HTTP methods are working behind the scenes.

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Ad Click Event Aggregation system design.
system design
May 114 min read

Ad Click Event Aggregation system design.

In this design, we focused on building a system that can handle a massive number of ad click events while still providing fast and accurate results. Instead of querying raw data every time, the system continuously processes events and stores aggregated results, making real-time queries efficient.

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