My Shopify store is live and bringing in traffic, but a few existing features aren’t running as smoothly as they should. I’m looking for someone who can go into the current theme and codebase, diagnose the bottlenecks, and tune up the store-side logic so everything works flawlessly from browsing through checkout. Key points: • The focus is strictly on functionality updates—no new apps or plugins need to be installed at this stage. • I want to preserve my present design and product catalogue; please keep visual changes to an absolute minimum unless they are required to fix a functional issue. • Typical tasks may involve refining the checkout flow, tightening payment gateway interactions, optimising script performance, or troubleshooting minor glitches in existing integrations. To help me sign off quickly, please let me know: 1. Which part of the store you plan to inspect first. 2. Your preferred workflow for staging and testing before pushing to production. 3. An estimated turnaround time once you have store access. If you have proven Shopify Liquid, JavaScript, and REST Admin API experience, this should be a straightforward project. Looking forward to getting the store running at full speed again.