things I remember: postgressql, defiantly (you meant definitely), you used deduct rather than deduce. Several typos were obvious typos that spellcheck would find. Double keys, letters swapped, etc.

Writing async from the start is worlds easier than refactoring. Had you been there at the start, I'm thinking your thesis may have taken a much different approach. It looks like you understand scalability, but, every day there's a new product to evaluate. :) Good luck with it.