I am expert in React/React Native technology stack and can build the application from zero.

I used to run R&D department as full-time employee in my early job, built architecture of web, mobile, backend and server infrastructure. Unified technology stack that react/react native for web and mobile, backend api with REST and GraphQL, auto deployment with docker and Bamboo.

I have completed 3 three medium-size (each > 50 man-months of development) enterprise applications in production which has web, iOS, Android client as well as backend in java

You may check out the https://demo.moshian.com which is a ATS(Applicant Tracking System) which is built with react, react-router, redux, apollo, graphql, ssr with JVM Nashorn.