Shiprocket API Cart Enhancements Needed

I need an experienced developer to tidy up the shipping flow on my online store. First, the current Shiprocket integration has to be re-configured so it pulls updated rates and works smoothly with my existing checkout. Alongside that, I want the Hyperlocal API hooked in to unlock same-day delivery for nearby customers while keeping the usual national and newly added international service active.

During this update you will also modify a few existing cart fields and polish the overall UI/UX of the cart and mini-checkout so the extra delivery options feel native rather than bolted on.

Key deliverables
• Re-configure Shiprocket API with correct endpoints, tokens and webhooks
• Integrate Hyperlocal API, exposing Same-day Delivery in the shipping selector
• Enable International Shipping option through Shiprocket where applicable
• Adjust current cart fields (labels, validation and order) to fit the new flow
• Refine cart and checkout UI for a clean, responsive experience across devices

Once done, customers should see accurate pricing, be able to choose between same-day, standard or international shipping, and move through the cart without friction. Please outline your approach, estimated timeline and any similar integrations you have completed.