Checkout Extensibility Build
Checkout UI extensions for trust content, delivery choice, gifting and post-purchase upsell. Native, upgrade-safe, and no longer dependent on checkout.liquid.
St. Louis, MO
Shopify Plus & Headless Commerce in St. Louis, MO
A dealer portal that beats the fax machine, wired to the ERP that still runs your inventory.
Delivered remotely for brands across St. Louis and Missouri.
Scale · St. Louis
Why St. Louis brands come to us for this
- Shopify B2B company profiles with multiple buyers, assigned price lists, case-pack quantity rules and net terms
- Resale and tax exemption certificates handled at checkout instead of reconciled by accounting afterwards
- ERP and legacy inventory systems integrated with explicit field ownership, so stock and lead times are honest
- Freight-rated and palletised shipping logic for orders that will never fit a parcel rate table
- Headless scoped only where a real content or configurator requirement justifies the ongoing engineering cost
Nobody here opens a Plus discussion by asking for a headless front end. It is about B2B: a distributor or manufacturer whose ordering process is a PDF price list, an email inbox and, more often than anyone likes to admit, a fax line. Shopify's native B2B — company profiles with multiple buyers, per-account price lists, quantity rules for case packs, net payment terms, saved reorder lists — replaces most of that without a bespoke portal build.
The integration layer is where the real engineering sits. Regional firms here run inventory, pricing and order records in systems that predate the web, and the right answer is rarely to replace them. Shopify becomes the sales and content system while the ERP stays the source of truth, connected through middleware or a direct integration with clear ownership rules for every field. We map that before anything is built, because it dictates what the storefront can honestly promise about stock and lead time.
Where Plus earns its money beyond B2B is checkout. Freight-rated shipping for palletised orders, purchase order capture, resale exemption certificates validated at checkout rather than reconciled by accounts later, and minimum order logic enforced by a Shopify Function instead of a note in the terms page. Headless we scope on merit — for most companies in this region a well-built Liquid theme is faster to run, cheaper to maintain and quicker to change.
Local context
Sequencing matters more here than feature choice
The mistake we watch companies in this metro make is launching a slick direct-to-consumer storefront first and telling the dealer network afterwards. It reads as a betrayal, and it costs relationships that took thirty years to build. The order that works is trade portal first, direct storefront second: the portal wins your customer service team hours back within weeks and gives partners a concrete reason to see the project as an upgrade rather than a threat. Only then do you open direct sales, on an assortment and at a price that does not undercut the people carrying your inventory. Missouri resale exemption handling, freight rating for palletised orders out of Earth City or Edwardsville warehouses, and PO capture are all part of that first phase — because a portal that cannot take a purchase order is a portal your buyers will abandon by week three.
Scope
What Plus & Headless includes
The same standard of work we run for every client — applied to a St. Louis brand’s realities.
Full service detailShopify Functions
Custom discount, delivery and payment-method logic written as Functions. Volume tiers, bundle pricing and B2B rules run server-side instead of via three stacked apps.
B2B on Shopify
Company profiles, price lists, payment terms, quantity rules and a self-serve reorder portal. Wholesale and DTC on one catalogue, one inventory, one admin.
Shopify Markets & Localisation
Multi-currency, multi-language, market-specific catalogues, domain routing and correct hreflang. Expansion without a store-per-country sprawl.
Headless Hydrogen Storefront
Hydrogen on Oxygen with the Storefront API, edge caching and streaming SSR. We build this only when the performance or content case is real, and we say so when it isn't.
ERP, PIM & 3PL Integration
NetSuite, Business Central, Akeneo or a 3PL wired in through a documented middleware layer with retry logic, error alerting and a reconciliation report.
Scoped and quoted for your St. Louis store
We do not work off a rate card. Every St. Louis engagement starts with a fixed statement of work — named deliverables, named dates, one number — written after we have looked at your store, not before. If a smaller first step would serve you better, we will say so.
Get this scopedHow it runs
From kickoff to results
Technical Discovery
We map your systems, order flows and edge cases end to end, then document where data breaks today. Output is an architecture diagram you can hand to any engineer.
Solution Design
Native-versus-custom decision for every requirement, with cost and maintenance load attached. Plenty of requests get answered with a $0 native setting.
Build in Sprints
Two-week sprints in a dev store with a staged demo at the end of each. You see working software every fortnight, not a status deck.
Load & Failure Testing
Peak-traffic simulation, payment-failure paths, partial-sync recovery and a rollback plan. We break it in staging so BFCM doesn't break it live.
Launch & Enablement
Phased rollout, monitoring dashboards and training for ops and finance. Every custom component ships with a README and a named owner.
Proof
Plus & Headless results
Anonymised under NDA. Figures pulled from the client’s own analytics.
Supplements (Subscription DTC)
~$4.2M/yr, 60% subscription revenue, 22 SKUs, US · Shopify Plus (Recharge, Klaviyo)
Monthly subscription churn hit 9.4% and the cancel flow was a single button on a hosted page nobody had touched in three years. Support processed 340 subscription changes a month by hand because customers could not do it themselves. The named constraint: no forced logins. The brand refused to gate account access behind a password reset, which ruled out every off-the-shelf portal.
9.4% → 6.1%monthly subscription churnheld for five consecutive months, not a single-month dip
+34%12-month customer LTV$187 to $251 on the subscriber cohort
19% → 38%of revenue from email + SMScategory benchmark for a healthy program is 25-40%
-71%subscription support tickets340/mo to 98/mo after the self-serve portal launched
Home Goods & Furniture
~$11M/yr, 2,300 SKUs, configurable upholstery, US · Shopify Plus + Hydrogen storefront (Oxygen)
Fabric, leg and size options turned 2,300 SKUs into more than 40,000 variant permutations, and the Liquid theme rendered a configurable PDP in 6.9 seconds on mobile. Collection filtering ran client-side, so 40% of shoppers left before the first product painted. The named constraint: the ERP stayed. It was the single source of truth for stock and lead times and was not up for replacement.
6.9s → 1.4smobile LCP75th-percentile field data on configurable PDPs
+64%CVR on configurable products0.44% to 0.72%. Sitewide conversion rate rose 23%
+52%organic sessionsserver-rendered facets made 1,900 filter combinations indexable for the first time
+$2.4Mincremental annualized revenuemonth-8 run rate vs. the pre-build baseline
In their words
Clients on this work
Reorder time 20 min → 3 min
“We sell wholesale into about 400 accounts and were still taking reorders by email like it was 2009. They built the B2B catalog on Shopify with net-30 terms and per-account price lists, and moved our whole rep team onto it in one week. Average reorder went from roughly 20 minutes of back-and-forth to under three.”
Director of WholesaleFood & beverage brand, ~$22M/yr · Dallas, TX
Verified client, 2025LCP 4.1s → 1.3s
“A Hydrogen build plus a NetSuite sync that our own team had failed at twice. Inventory finally matches between the warehouse and the storefront, which sounds boring and is the most valuable thing anyone has done for us this year. LCP went from 4.1s to 1.3s. The honest part: the first six weeks felt slow and I genuinely wasn't sure we'd picked right — it only clicked once we moved to a standing Thursday call with the engineers instead of account-manager summaries.”
CTOJewelry brand, ~$18M/yr · New York, NY
Verified client, 2026FAQ
Plus & Headless in St. Louis — your questions
They will if it is faster than what they do now, and only then. That means saved reorder lists from their own order history, their negotiated pricing visible without asking, live stock, and a purchase order field. We usually onboard the ten highest-volume accounts by hand first, fix what annoys them, then roll out to the rest. Portals that launch to the whole network on day one tend to get abandoned quietly.
Exemption status is held against the company profile so qualifying accounts check out without tax rather than paying and claiming it back. The practical work is collecting and expiring certificates properly, which we usually wire to your tax platform so a lapsed certificate flags before it becomes an audit problem. It removes one of the most common reasons a wholesale buyer abandons a self-serve cart.
Yes, through carrier-calculated rates and Shopify Functions for order-level rules, though this is where scoping matters. Parcel-sized orders rate normally, palletised orders route to a freight quote or an LTL rate service, and weight or volume thresholds decide which path an order takes. The goal is that your logistics team stops manually repricing shipping on a third of B2B orders.
It is common in this region and usually workable. Where there is no API we integrate through scheduled file exchange — flat files or EDI on an SFTP drop — which is unglamorous but reliable, and plenty for inventory, pricing and order writeback on a fixed cadence. The design question becomes latency: how stale can a stock number be before you are promising something you cannot ship. We answer that per product line, not globally.
Usually not. A well-built Liquid theme hits sub-2s LCP and costs a fraction to run. Headless earns its keep when you need a custom front-end framework, a heavy CMS-driven content layer, or interactive product configuration Liquid cannot serve. We will talk you out of it if the numbers don't hold.
No. Shopify has retired it in favour of checkout extensibility, and anything still running on it is on borrowed time. We migrate custom checkout logic into checkout UI extensions and Functions, which survive platform upgrades instead of blocking them.
For most mid-market brands, yes. Company accounts, per-company price lists, net payment terms and quantity rules cover the majority of wholesale workflows natively. Where it falls short is complex quoting and contract pricing, which we handle with Functions or a light custom app.
Next step
Plus & Headless for your St. Louis brand.
Thirty minutes with the strategist who would actually run your account. We screen-share your store, read your data live, and tell you the three highest-value things we can see from the outside.
Shopify or Shopify Plus stores doing $150k/mo or moreFounder, CEO or eCommerce lead on the callNo deck and no pitch — we open your store instead
Prefer to write it out? [email protected] gets a real reply the same business day, Mon-Fri, 9am-6pm MT.