React.js App Buildout & Maintenance - Full time position - USA HOURS

I am looking for a skilled developer to build and maintain a React.js student practice exam webapp.

Design:
- I already have a design ready, so no assistance is needed in this area.

Features:
- User login functionality
- User tiers hierarchy for different access levels
- Question bank for storing and organizing exam questions
- Ability for users to take exams and receive scores
- Analytics to track and analyze user results


In order to separate spammers from real candidates, if you agree with this statement please write it on top of your bid: "I am available to work in the US time zone and have X hours left available today, plus I'm available this weekend." - where "X" is the amount of hours you have available for work today.

Ideal skills and experience:
- Strong proficiency in React.js framework
- Experience in developing web applications with user login and tiered access systems
- Familiarity with building and managing question banks
- Knowledge of implementing scoring systems for exams
- Ability to integrate analytics for tracking and analyzing user results.