Shopify Plus Developer Needed on Standby for Ongoing Retainer Work (B2B, Functions, Theme)

DO NOT CALL ME. I will report all spammers. We run an established, fast-growing Shopify Plus store (premium kids' brand) and need a reliable Shopify developer on an ongoing retainer. You'd join our Slack and knock out tasks as they come up, with fast turnaround and clear async communication. First task to prove fit: build a Shopify Function (checkout validation) that enforces a $400 minimum order value for B2B/wholesale customers only, scoped by customer tag, leaving retail unaffected. Ongoing work will include: Shopify Functions: checkout and cart validations, delivery and discount customizations B2B setup: companies, catalogs, Markets, price lists, quantity and order rules Theme work: Liquid, sections, custom storefront features App configuration and integrations: subscriptions (Appstle), Klaviyo, shipping apps, GemPages General storefront and checkout customization You should have: Proven Shopify Plus experience Shopify Functions experience, writing and deploying via the CLI Strong Liquid and theme skills B2B / wholesale experience Clear, fast communication and comfort working async in Slack Engagement: ongoing retainer, monthly hours to be agreed, starting with the function task above. US time-zone overlap preferred. Please reference this section for the 4th screening question. Take a look at our subscription landing page: https://www.cupkin.com/collections/sticker-book-subscription Right now, to unlock the free bonus book offer, a visitor has to enter their email address first. Then we scroll them down to a gallery of 60+ themes to pick from. It's clunky and adds friction before anyone has committed to anything. I want to flip it: one prominent "Subscribe" button, and when they click it, a widget/modal pops up that lets them choose their free book from our themes, then continues into the subscription checkout. No email wall up front. In a few sentences, how would you approach building this? Please note any apps or tools you'd expect to work with (we run Appstle for subscriptions on Shopify Plus), roughly how long you think it would take, and one thing you'd want to clarify before quoting.