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.
Paris
Shopify Plus & Headless Commerce in Paris, France
Markets, Functions and checkout extensions for Paris brands whose second country arrives long before their second warehouse.
Delivered remotely for brands across Paris and France.
Scale · Paris
Why Paris brands come to us for this
- Shopify Markets running a French domestic market and an English EU market from one catalogue, with hreflang that separates fr-FR, fr-BE and international English
- Tax registrations, rates and overrides configured to match your actual OSS filing, then reconciled against a real month of orders
- Checkout UI extensions for pickup-point selection, so the relais choice reaches the order and the shipping label rather than a comments field
- Age verification and per-country delivery restrictions for wine and spirits, applied by destination instead of switched on globally
- B2B on Shopify for the wholesale side: company accounts, pack quantities, net terms and euro plus non-euro price lists on one inventory
A Paris brand crosses a border early and cheaply. Belgium, Germany, Spain and Italy are a truck ride away and share a currency, so a store doing a few hundred thousand euros is often already shipping into four countries with one price list and a shrug. That is exactly the point where Shopify Markets stops being a nice-to-have. Country-level pricing, market-specific catalogues where a category is restricted, domain and language routing, and correct hreflang so a Belgian French speaker and a German buyer are not fighting over the same URL.
The tax layer is the part that gets improvised and then costs money. Once cross-border B2C sales pass the EU-wide distance-selling threshold, VAT is due at the buyer's rate, and the One Stop Shop return depends on your store recording the right rate against the right destination on every order. That is a configuration and data problem before it is an accountancy problem. We set the tax registrations and overrides in Shopify to match what your accountant has actually filed for, then reconcile a month of real orders against it rather than trusting the setting.
Plus earns its fee in Paris through checkout. Pickup-point selection with a live map that saves the chosen relais to the order and passes it to fulfilment. Age verification and delivery restrictions for wine and spirits, applied per destination country because the rules are not uniform across the EU. Discount logic written as Shopify Functions so promotional mechanics stay inside the rules that apply outside the sale windows. Hydrogen is a separate conversation, and for most brands this size we will argue you out of it.
Local context
Aubervilliers wholesale and Le Marais retail are two different Plus builds
A great many independent labels selling direct today came out of the wholesale trade concentrated around Aubervilliers and the Sentier, and a lot of them still run both sides. That combination is what makes B2B on Shopify worth the Plus fee here rather than a second platform: company profiles for the boutiques and distributors you already supply, per-company price lists in euros and a second currency for the non-euro accounts, quantity rules that reflect packs rather than single units, net terms, and a self-serve reorder portal that takes the Tuesday morning order emails off someone's desk. A Le Marais retail-only brand needs almost none of that and should not pay to have it built. What that brand needs is checkout extensibility, Markets and Functions. We decide which of the two you are in the first technical workshop, because scoping wholesale capability into a business that will never switch it on is the most common way a Plus budget disappears without a return.
Scope
What Plus & Headless includes
The same standard of work we run for every client — applied to a Paris 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 Paris store
We do not work off a rate card. Every Paris 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 Paris — your questions
One setup, in almost every case at this size. Separate stores split your inventory, duplicate the catalogue, triple the theme maintenance and create a hreflang problem you built yourself. Markets gives you per-country pricing, currency, language, catalogue and domain routing from a single admin. The genuine exception is a separate legal entity with a different assortment and its own warehouse, and that is a business decision rather than a platform one.
Market-specific catalogues plus delivery restrictions, rather than a warning banner and hope. Restricted products are excluded from the markets you are not cleared to sell into, so a buyer in a country you cannot serve never sees the item in a collection or reaches it by a direct link with a live buy button. Age verification runs at checkout. What licences and excise arrangements you hold is your side of the line; making the store obey them is ours.
For most of the independent labels we see here, yes. Company profiles with several named buyers, price lists per account, pack-based quantity rules, payment terms and self-serve reordering cover the bulk of a wholesale week. Where native B2B runs out is contract quoting and bespoke per-order negotiation, which we handle with Functions or a light custom app. Which of the two you are gets settled in discovery, not after you have committed.
Multi-language on its own is not a reason to go headless. Markets handles French and English inside a Liquid theme and a well-built theme reaches sub-two-second LCP at a fraction of the running cost. Hydrogen earns its keep when you have a genuinely heavy editorial layer, interactive product configuration, or a front-end requirement Liquid cannot serve. If you ask us for it and the case is not there, we will say so before you spend the money.
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.
Through a documented middleware layer, never point-to-point. Every sync gets idempotency keys, retry with backoff, dead-letter handling and alerting into your Slack. You also get a daily reconciliation report so a silent failure cannot run for a week.
Next step
Plus & Headless for your Paris 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.