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.
Seattle, WA
Shopify Plus & Headless Commerce in Seattle
Seattle founders ask about the Storefront API on the first call — so we bring the architecture decision, the cost of it, and the case for saying no.
Delivered remotely for brands across Seattle and Washington.
Scale · Seattle
Why Seattle brands come to us for this
- Allocation, per-customer limits and inventory holds for release-date drops that sell out in minutes
- B2B company accounts and price lists for the independent outdoor and coffee retail network across the Northwest
- Checkout UI extensions instead of the retired checkout.liquid customisations still running on older Seattle stores
- Shopify Markets and duty handling for cross-border orders into British Columbia
- A written Hydrogen assessment with a maintenance cost attached — including the recommendation not to build it
Nowhere else do we get asked about streaming SSR and edge caching before we get asked about design. That is what happens when half the operators in a metro came out of engineering orgs in South Lake Union, Bellevue and Redmond. It makes the conversations better and it creates a specific failure mode: technically fluent teams talking themselves into a headless build that a well-engineered Liquid theme would have matched for a third of the money.
So we run the comparison properly. We benchmark your current storefront, model what Hydrogen on Oxygen would actually change at the 75th percentile of real user data, and put a maintenance figure next to it. Sometimes it clears. Content-heavy commerce, a product configurator, or an in-house front-end team who will own the codebase are all real reasons. 'Our CTO prefers React' is not one we will bill you for.
The rest of the Plus surface usually pays back faster anyway. Checkout UI extensions for delivery choice and gifting. Shopify Functions for tiered pricing to specialty outdoor retailers. Allocation and queue logic for a limited run that would otherwise oversell in ninety seconds. B2B company accounts so wholesale stops living in a spreadsheet and an inbox.
Local context
Plus features that map to how Seattle brands actually sell
Two local patterns drive most of the Plus work here. The first is drops: the gaming, collectibles and hobby cluster around Bellevue, Redmond and Renton runs release-date launches where allocation, per-customer limits and inventory holds decide whether a run sells cleanly or turns into a week of refunds. Shopify Functions and checkout extensions handle that natively; a stack of apps fighting each other does not. The second is wholesale into specialty retail — outdoor and coffee brands here sell direct and through independent shops across the Northwest, and B2B on Shopify puts per-account price lists, case-pack minimums and net terms on the same inventory as DTC. Add Markets if you ship into British Columbia, which for a Seattle brand is a two-and-a-half-hour drive and a genuinely different duty, tax and carrier reality.
Scope
What Plus & Headless includes
The same standard of work we run for every client — applied to a Seattle 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 Seattle store
We do not work off a rate card. Every Seattle 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 Seattle — your questions
Yes, with numbers rather than opinion. We benchmark your current field data, model the realistic gain from Hydrogen and put an annual engineering cost next to it. If your team is genuinely going to own and maintain a front end, headless can be the right call. If it will be maintained by whoever is free, a Liquid theme will serve you better for years.
The infrastructure can. What usually fails is the store: an app-heavy cart, uncapped quantities, and no allocation logic. We build per-customer limits, inventory reservation, queue behaviour and a waitlist so demand you cannot fulfil still turns into captured email and SMS rather than a support queue and chargebacks.
For most brands at this size, yes. Company profiles with multiple buyers, assigned price lists, case-pack and minimum quantity rules, net terms and self-serve reorder all run on Shopify Plus. Your reps stop rekeying orders from email, and wholesale and direct finally read the same inventory.
We model it rather than assume. The Plus fee earns out when you are actually using checkout extensibility, Functions, B2B or Markets — not when you are paying for a tier and running a stock theme. We will show you which of your requirements need Plus and which are a free setting on your current plan.
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 Seattle 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.