Node Socket & MongoDB Developer Needed

I'm looking for an expert in Node Socket and MongoDB to help me in A Unity based game app. some time sockets and api responses are slow and some time some api showing error in different regions . you need to optimize the database request and slow queries if there are .

I need expert so he can optimize my api code and codes performance and can fix the issues , guide existing team for it.

Key Project Details:
- **Current State**: We need to upgrade an existing application
- **Core Task**: The key task will involve performance optimization of the application
- **Skill Set Required**: You should have a strong background in both Node Socket and MongoDB. Prior experience in upgrading existing applications and performance optimization is a big plus.
- **Goal**: The main goal of this project is to enhance the performance of the application, while upgrading it as needed.


As the api and sockets using for a unity based game application so
Please highlight any similar projects you've completed in the past and how you ensured the performance optimization of those applications. Thank you.