Are there any sub-optimal choices( or short cuts taken due to limited time ) in your implementation?
Yes, I had encountered several issues while working on this project. Although it was somewhat challenging for me, I loved working on it.
I had started this project using Spring Boot framework and Java for the backend. I was successfully able to make the API calls using Java. However, as I went further in the process and tried connecting the backend with the frontend React, I was encountering errors. I spent some time solving it but since I thought I was hitting a roadblock everytime I try to find the reason for the error, I decided to try a different approach and started from scratch.
I was able to use axios alone to make the API calls and thus thought I wouldn't need a "special" backend for this project
Is any part of it over-designed? ( It is fine to over-design to showcase your skills as long as you are clear about it)
No, actually I feel it is under-designed. I'm pretty sure I could have done much much better if I didn't have a lot on my plate during this week.
If you have to scale your solution to 100 users/second traffic what changes would you make, if any?
Firstly I think I would have to change the way the API call is made because there certain limitations for the free usage of API
Secondly, I guess instead of making an API call for every user, we can try making it just once and serving it to all users
What are some other enhancements you would have made, if you had more time to do this implementation
Like I said earlier, I would have definitely improved the design and UI of the application
Also, I would have tried fixing the error that I encountered using Spring Boot and proceeded with it
Then I would have given the user an option to enter the crypto exchange of their choice by providing the API key of the exchange