Unreal Engine Game Fixes

I'm seeking an experienced Unreal Engine developer to address various issues in my PC game project.
The app is already working well on but while integrating on WEBsite, several serious issues come across.
This is so urgent and I want this fixed within 24 hours .

Key tasks include:
- Performance Optimization: Improve frame rates and reduce lag.
- Bug Fixes: Identify and resolve existing bugs.
- Feature Enhancements: Upgrade and add new features.
- Integration issue fixing experience.
- Understanding game system.

Ideal Skills & Experience:
- Proficiency in Unreal Engine.
- Strong background in game development for PC.
- Experience with performance optimization, debugging, and feature implementation.
- Backend logic

Please provide examples of similar work done and your approach to game project improvements.