Shopify Store Performance & CSS Fix

My Shopify store is suffering from slow performance due to scripts—​and I’ve already pinpointed the specific scripts that are dragging load times down. Alongside that, a few CSS errors are creeping in and spoiling the visual polish.

Here’s what I need:

• Optimise or replace the identified slow JavaScript files so pages render snappily without breaking existing functionality.
• Tidy up every CSS error you encounter, ensuring consistent styling across all devices.
• Provide before-and-after speed metrics using Shopify’s analyser, Lighthouse, or a similar tool so we can see the real gains.
• Document the key code changes in a brief hand-off note so I can maintain the improvements long-term.

You’ll have full theme and asset access in a staging environment the moment we start. Please let me know your estimated turnaround time and any examples of previous Shopify optimisation work you’re proud of.