Have you ever used an app and wondered what actually happens after you click a button?
Honestly, I hadn't.
I knew terms like frontend, backend, database, and API, but they always felt like separate pieces of a puzzle.
After attending the Full Stack Development session as part of the AWS Summer Builder Cohort 2026, conducted by Sumit Grover and Vridhi Duggal, I finally started seeing the complete picture.
One thing I really liked was that the session wasn't about introducing fancy technologies. Instead, it answered a much more interesting question:
"What actually happens behind the scenes?"
A single user request isn't just a click on a webpage.
It travels through the frontend, reaches the backend, interacts with databases, sometimes checks the cache first, processes the required logic, and finally returns the response we see on our screen.
I've used hundreds of applications, but this was probably the first time I paused and thought about everything happening in those few milliseconds.
Another concept that genuinely clicked for me was caching.
Earlier, I simply knew that caching makes applications faster.
The explanation during the session completely changed that understanding.
If thousands of users are requesting the same data repeatedly, why keep asking the database every single time?
Store frequently accessed data in memory, reduce unnecessary database calls, lower latency, and let the database handle requests that actually require it.
Such a simple idea.
Such a huge impact.
Another interesting discussion was around scalability.
Building an application that works for 50 users is one thing.
Building one that continues to work smoothly for thousands or even millions of users is a completely different challenge. It made me realize that writing code is only one part of software development - designing systems that can grow is equally important.
Apart from the technical content, I really appreciated the way Sumit Grover and Vridhi Duggal conducted the session.
The coordination between them was seamless. It never felt like two speakers taking turns. Every topic naturally connected to the next, making the entire session feel more like an engaging conversation than a presentation.
I joined the session expecting to learn about full stack development.
I left with something much more valuable - a better understanding of how all the pieces come together to build the applications we use every day.
A big thank you to Sumit Grover, Vridhi Duggal, and the entire AWS Summer Builder Cohort 2026 team for such an insightful session.
Already looking forward to the next one! 🚀
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