13d • Notes 📝
Learning by building project
Learning by building projects
Day-01
1. The Real-World Problem
In local spots like clinics, labs, and barber shops, waiting in line is broken.
The Cause: Customers have no idea when their turn is actually coming unless they are physically standing in the room.
The Effect: People waste hours sitting in crowded waiting areas just to defend their spot. It is frustrating for the customer and chaotic for the business owner.
2. The Solution
I am not building a basic calendar app where you pick a time for next week. I am building a live, real-time queue.
A customer takes a digital token on their phone, watches the line move live, and walks in exactly when the admin clicks "Next" for their number. It puts the physical waiting room into their pocket.
3. Why I'm Building this:
I have already built basic CRUD apps, but standard tutorials are a trap. They don't teach you how real systems break under pressure. I chose this project to push my backend skills forward by solving three specific engineering problems:
Race Conditions: What happens when 50 people click "Get Token" at the exact same millisecond? I am learning how to handle database concurrency so two people don't get Token #5.
WebSockets (Real-Time Data): Standard APIs require the user to refresh the page to see updates. I am implementing WebSockets so the queue updates instantly on everyone's phone without reloading.
Multi-Tenancy: Instead of hardcoding this for one specific Business, I am architecting the database so multiple different businesses can share the exact same backend securely, without ever seeing each other's data.
4. The Methodology
I am not following a step-by-step tutorial. I am employing Question-Driven Development.
I am using LLMs strictly as senior architectural mentors. I do not use AI to write my application code or spoon-feed me syntax. I use it to test my database schemas, validate my finite state machines, and expose the edge cases in my system design before I write a single line of code.
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Learning by building project
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