Multiplayer game Unity app

I'm looking for a Unity developer to create a multiplayer city builder game for Android and iOS. The game will require features for unique user interfaces, such as resource management, group management, and unit management. It's a city building game that also includes Multiplayer elements. This game should be optimized for Android and iOS and take into consideration the devices available, such as smartphones and tablets. Ideally, the game should have a user-friendly design so players can easily navigate and play the game with ease. The game must have online capabilities including the ability to compete with other players, chatroom integration with the game, and have a leaderboard system. Of course, this game must also have a solid and secure user authentication system and a reliable server-side infrastructure in order to ensure a smooth and enjoyable gaming experience.