Welcome to the community, @4dcoder! We’re glad to have you on-board 
I skimmed through the previous replies and I can see that most of the tips and advice I would have liked to share with you have already been said, so I won’t repeat those things.
There is one additional thing I would like to mention:
I can see that you’re mentioning databases such as Redis in combination with performance-related topics, which suggests to me that maybe you’re considering using Redis as a cache of sorts.
If you’re working with ephemeral data (data which does not need to be persisted, e.g. a cache), then you might have better options with Elixir. For exmaple, you could store some state in memory by using processes or ETS tables, and persist to a database on some interval if necessary.
The book Adopting Elixir has a very good chapter about persistence strategies and dealing with ephemeral data, which you will find on pages 107-108 and 116-117.
Also, I highly recommend reading Programming Elixir, which is a very thorough and well-organised book. It’s not free, but it might save you quite a bit of time and effort to make up for the cost.
Cheers! 
