Experienced Web Developer for Site Optimization

I’m looking for an experienced web developer to fix bugs and technical issues on an existing website.
The work may include:
Fixing frontend and backend bugs
Resolving layout and responsive issues
Fixing broken functionality
Debugging JavaScript/PHP issues
Fixing forms, buttons, links, and other website errors
Testing the fixes across desktop and mobile
You should be able to identify the root cause of issues and implement clean, reliable fixes without affecting existing functionality.
Requirements:
Strong web development and debugging experience
Experience with HTML, CSS, JavaScript and PHP
Good problem-solving skills
Ability to start soon

Please share a brief example of similar bug-fixing work you have completed