Analytics Tracking Implementation in React/Javascript

I'm seeking a developer who is adept in Google Analytics, Mixpanel or Adobe Analytics for my project. Your task would be to implement analytics tracking. The specific events to track have not yet been determined and will be discussed after hiring. The primary goal of this analytics tracking implementation is to be determined, it could be anything from understanding user behavior to improving conversion rates or identifying areas for optimization. Experts in React/JS with prior experience in working with similar projects are preferred.