I have 8 years of experience and two crypto products online
https://reuseablecryptoqrcode.unstoppable (only visible in Opera or Brave browser with 50s downtime)
https://smartheritagecontract.unstoppable
The first one is built with angular and the second one with React. for the backend i used in both products Nodejs Express and Mongodb. Besides i have build projects with
AspNetCore (c#), Flutter (Dart), Ionic, Flask (Python), Conduit, Express MetaMask sdk, ethers.js, Redux Observable Stripe and PostgreSQL. Also, I built my own UTXO (Bitcoin) with Dart:
https://github.com/notyodeas/pod
https://github.com/notyodeas/docs.ocnsens.us