Fix 403 Error, Backdoor Removal, BharatPe Integration & UI Optimization for PHP Script

I am looking to hire an experienced PHP backend developer to work on my project and help get it live. Below are the detailed requirements:

1. Fix 403 Forbidden Error: Resolve the server/LiteSpeed 403 Forbidden issue and ensure smooth routing and live deployment.
2. 100% Backdoor & Malware Removal: Deep scan and remove all hidden backdoors, malicious code, tracking scripts, and obfuscated/encoded files (0% backdoor tolerance).
3. 100% Full Ownership & Clean Code: Deliver complete control of the clean source code with no remote dependencies, encrypted blocks, or third-party license restrictions.
4. Multi-Domain & VPS Hosting Ready: Remove any domain locks so the script can run seamlessly across VPS hosting and unlimited domains.
5. BharatPe Gateway Integration: Integrate BharatPe Auto Payment Gateway working specifically with Merchant ID and Token.
6. UI/Icon & Emoji Optimization: Ensure all system icons, fonts, and emojis load smoothly, display perfectly across all devices/browsers, and work without any broken assets or rendering issues.
7. 100% Bug-Free & Smooth Performance: Clean all system bugs, errors, and notices for high-speed, stable performance.