Freelance Developer Needed: (Headless) Storefront API Migration

Ask & Offer
1

Evertune (evertune.com/shop/) is looking for an experienced Shopify developer to help us migrate away from the deprecated JS Buy SDK v2.x and rebuild our custom (headless) e-commerce functionality using the Shopify Storefront API.

We’re ready to start immediately — our current setup is no longer operational. A detailed breakdown of the requirements, including notes and screen captures, is available to serious applicants.

Please include the following in your reply:

Estimated Time & Availability: How many hours do you expect this will take? When can you start, and when do you expect to deliver?

Your Rate: Flat rate or hourly rate (USD), along with your preferred payment terms.

Relevant Experience: At least one headless Shopify project using the Storefront API. Include a live site, code sample, or case study.

Client References: One or more Shopify clients we can contact (name, company, and email or LinkedIn).

(Optional) Your Approach: A short summary of how you’d tackle this migration — particularly how you’d separate shared functionality from page-specific integrations.

Feel free to respond here with your application. Once we’ve connected, I’ll share contact details and access instructions.

3

Hey — this caught my eye because I’ve handled this exact migration for a few headless Shopify stores recently.

A few things that might be immediately useful for your team, whether or not we end up working together:

On the SDK deprecation timeline: The JS Buy SDK v3.0 stopgap that Shopify released only has support through January 1, 2026 — which has already passed. So if you’re still on v2.x or even v3.0, you’re running on borrowed time. The move to the Storefront API Client is the only long-term path forward.

The biggest gotcha in this migration is that the JS Buy SDK returns RESTful-style responses with pre-fetched relationships (images, variants, etc.), while the Storefront API Client returns raw GraphQL responses — only the exact fields you query for. That means your frontend code that currently accesses nested product data will need to be restructured, not just swapped out. Pagination also changes — the SDK’s fetchNextPage helper doesn’t exist in the Storefront API Client, so you’ll need to handle cursor-based pagination manually.

The upside: Once you’re on the Storefront API directly, you get access to globally-deployed Carts (faster checkout, better international performance), product bundles, contextual pricing, Shopify Functions, and subscription support — things the old SDK couldn’t touch. For a product like EverTune bridges where you have distinct models (G, F, F7, F8, T, multiscale) with varying specs and lead times, the richer cart and product data capabilities could actually improve your customer experience, not just keep the lights on.

How I’d approach this for your store specifically:

  1. Audit your current JS Buy SDK integration to map every API call, data dependency, and checkout flow touchpoint.

  2. Build the Storefront API Client layer with proper GraphQL queries optimized for your product catalog structure — bridges, guitars, parts, templates, and merch each likely need different query shapes.

  3. Migrate the cart and checkout flow to the new Cart API, including your warranty and return policy logic if any of that touches the checkout.

  4. Test thoroughly — especially around the Installation Program orders, which probably have a more complex flow than standard bridge purchases.

I’ve done this for headless stores running custom frontends (not Hydrogen), so I’m comfortable working within an existing non-Shopify frontend codebase. Happy to share a specific case study over a quick call if it’d be helpful.

You can reach me directly at admin@shopifyartisans.com, or just DM me here.

4

@Cr007 I emailed you, but no response – there was another email cloaked behind the one you left. We’re still looking for help, and would like to book a virtual call with you. Please reach back out – you can also reach us via the contact page on our website.

Thanks!