Looking for Full Stack Developer ( ROR)

Ruby on Rails architecture best practices Strong OOP knowledge in Ruby. Asynchronous Networking in Ruby Designing RESTFul HTTP APIs using JSON-Schema or JSON API (jsonapi.org). Ability to architect and develop API only backend Experience in using ActiveRecordSerializer Understanding O-Auth2 or JWT (Json Web Token) authentication mechanisms. How to use RSpec Rails Security Best Practices PostgreSQL and Rails. Ruby on Rails architecture best practices Strong OOP knowledge in Ruby. Asynchronous Networking in Ruby Designing RESTFul HTTP APIs using JSON-Schema or JSON API (jsonapi.org). Ability to architect and develop API only backend Experience in using ActiveRecordSerializer Understanding O-Auth2 or JWT (Json Web Token) authentication mechanisms. How to use RSpec Rails Security Best Practices PostgreSQL and Rails.