Unity Engine Game Developer

We run a football manager game and are seeking for a Unity developer to update our existing match engine application. It is divided in two parts, the engine that simulates the matches and the engine that plays the match replays.
The match engine is built using Unity version 5.3.6.f1 and UnityScript.

It is already working and tested with real data from the website game for many years but, we are about to relaunch the game during Q4 of 2022 and want a new developer who can essentially recreate a new and improved match engine based on the existing one.
Your work will be to make many improvements, how players behave, more impactful the way player attributes and tactics/formations are set up in the site and display in the match engine, show approximate amount of fans and actual stadium visual as the current version always displays full stadium with full fans and lastly mobile app platform support for the visual match (currently only has been working on desktop).
Please check the screenshot to get a better idea:
https://imgur.com/a/IKYPrzS
You must be very familiar about the sport itself and have some knowledge in football manager games.