Shopify Plus Development Services

Certified Shopify Plus developers who ship your build on time and on spec

Custom checkout extensions. Headless storefronts. B2B wholesale channels. ERP and CRM integrations. Redefine delivers your full Shopify Plus build on a fixed timeline. No scope creep, no open-ended estimates.

Shopify Plus Certified Partners
12-week fixed delivery
Enterprise-grade architecture
Senior developer reviewing Shopify Plus enterprise build specifications on screens in natural light workspace
12
Week delivery
98%
On-time rate
6+
Plus features
12 weeks
Fixed delivery from signed brief to live Shopify Plus store
5 systems
Enterprise systems integrated per average Plus build (enterprise resource planning, customer relationship management, warehouse management system, business intelligence, marketing)
0 downtime
Migration target across all Shopify Plus go-live events
100%
Of Plus capabilities deployed, not just the platform license activated
Why Plus builds stall without the right development partner

Most enterprise Shopify Plus projects run over budget and past deadline

"

We engaged three agencies before Redefine. All three over-promised timelines and under-delivered on Shopify Plus features. The checkout extensibility we were sold in the pitch was handed off to a junior contractor six months in.

VP of Technology
Enterprise DTC brand, Shopify Plus migration from Magento
67%
Of enterprise builds run past their quoted timeline
Every week of delay costs revenue at launch
3x
Average revision cycles when scope starts unclear
Scope creep is the leading cause of Plus build failure
42%
Of Plus stores never use checkout extensibility after launch
Paying for Plus without using the platform's edge
Fixed
Redefine's delivery date, in writing, before any code is written
No open-ended retainers, no moving finish lines
Operations leader reviewing missed development milestones with team at shared screen
Development process

From signed brief to live Shopify Plus store in 12 weeks

A fixed five-phase program takes your store from brief to launch. You get checkout extensibility, a B2B channel, and full integrations. Each phase ends with a deliverable you approve first.

1
Weeks 1 to 2
Discovery and Architecture Planning

We document requirements, tech stack, Plus feature roadmap, integration mapping, and timeline. Everything is confirmed before development starts.

2
Weeks 3 to 5
Design System and Component Build

Design tokens, component library, and checkout UI extensions are wireframed. Your team approves them before a single production component ships.

3
Weeks 6 to 10
Development Sprints and Integration

We build checkout extensions, Shopify Functions, the B2B channel, Flow automation, and every ERP and CRM integration across five sprints.

4
Week 11
Quality Assurance, Staging, and User Acceptance Testing

Full device, browser, and load testing plus checkout and integration validation. Your team runs UAT in staging before anything reaches production.

5
Week 12
Launch, Go-Live, and Handover

Zero-downtime launch, then 48 hours of monitoring. You get full handover docs and team training on every Plus capability.

Phase 1: Discovery and Architecture
Discovery Brief, Enterprise Build Scope
Confirmed scope items
Custom checkout user interface extension (upsell + trust)
Confirmed
B2B wholesale channel, 4 price tiers
Confirmed
Salesforce customer relationship management bidirectional sync
Confirmed
Shopify Flow, 7 automation workflows
In review
NetSuite enterprise resource planning inventory sync
Spec in progress
Timeline confirmed: 12 weeks from Week 1 kickoff to Week 12 go-live
Design System, Component Approval
Component library, approval status
Design tokens and brand systemApproved
Checkout user interface extension wireframesApproved
Product page component set (18 variants)In review
B2B company portal layoutAwaiting sign-off
Collection and search page templatesNot started
Sprint Board, Week 8 of 10
14
Completed
6
In Progress
2
Remaining
Checkout upsell extension, live on stagingDone
Shopify Functions: custom discount logicDone
B2B company portal, net terms flowBuilding
Salesforce customer relationship management bidirectional syncBuilding
Quality Assurance Report, Staging Environment
247
Tests passed
3
Open bugs
0
Blockers
Checkout flow, all 18 scenarios passing
B2B portal, company login and pricing verified
Mobile checkout cumulative layout shift, minor fix queued
Go-Live Status, Week 12
Store Live
Zero-downtime migration completed
DNS cutoverComplete
Checkout extensions, live in productionComplete
B2B channel, first orders processingLive
Enterprise resource planning sync, inventory confirmed real-timeLive
48-hour post-launch monitoring active
Platform architecture

The full Shopify Plus stack we build for every enterprise program

Every Redefine Plus build activates your whole platform, not just the storefront theme. Click any node to see how each part connects to your operations.

Core
Shopify Plus Storefront

Organization admin, multi-store setup, user access, and custom domain configuration for all markets. The foundation everything else connects to.

Checkout
Checkout User Interface Extensions

React components rendering in the checkout: upsell blocks, trust badges, custom form fields, loyalty point display, and gift message inputs.

Functions
Shopify Functions

Server-side custom logic: tiered discount rules, custom shipping rate calculation, payment method filtering by order type or customer segment.

B2B Channel
B2B on Shopify Plus

Company accounts, net payment terms, custom price lists per company, purchase approval workflows, and dedicated B2B storefront routing.

Automation
Shopify Flow

Workflow automations triggered by store events: customer tagging, fraud flagging, inventory reorders, B2B approval notifications, and loyalty tier updates.

Integrations
Enterprise Resource Planning and Customer Relationship Management Integration Layer

Real-time data flows between Shopify Plus and your ERP, CRM, and WMS. That means live inventory, unified customer data, and automatic fulfillment routing.

Service scope

Six Shopify Plus development capabilities delivered in every engagement

Not a menu of add-ons. Every Redefine Plus development program includes all six service lines, scoped to your specific catalog, workflow, and integration needs.

01

Custom Checkout Development

Checkout UI extensions, post-purchase flows, and Shopify Functions built to your spec. Upsells, trust signals, custom fields, and payment logic that survive every platform upgrade.

02

Headless and Hydrogen Architecture

Decoupled storefronts built on Shopify Hydrogen and React Router. Edge-rendered, globally fast, and fully composable, without the speed penalties of standard themes.

See Plus B2B Service
03

Enterprise Resource Planning and System Integration

Real-time two-way sync between Shopify Plus and your ERP, CRM, and WMS. Your inventory, orders, customer data, and finances stay accurate across every system.

04

B2B Channel Shopify Plus Implementation

Full B2B on Shopify Plus: company accounts, buyer portals, custom pricing, net terms, and approval workflows. It runs alongside your direct-to-consumer store.

05

Performance and Core Web Vitals

We tune your theme or Hydrogen store for LCP under 2 seconds on mobile. Faster pages lift conversion and protect your search rankings.

See Technical Search Engine Optimization
06

Migration from Other Platforms

Zero-downtime migration from Magento, BigCommerce, WooCommerce, or custom platforms. We move all product, customer, and order data while preserving SEO rankings and redirects.

Client results

A complete B2B headless Shopify Plus build, delivered on schedule

B2B ecommerce team reviewing headless platform rebuild performance improvements on analytics screen
B2B Promotional Products, Headless Ecommerce
B2B promotional products company (name withheld by request)

An established B2B promotional products company serving complex catalogs, customer-specific pricing, and approval-based purchasing workflows.

Systems integrated
0
Five enterprise systems unified: Dynamics ERP, Salesforce CRM, BI tools, email marketing, and the B2B approval layer.
Platform result
Zero
Downtime during migration. The B2B purchasing experience transitioned without disruption to active accounts or open orders
Architecture outcome
Scalable growth

The headless architecture now supports catalog scale, marketing initiatives, and future system enhancements without requiring a platform rebuild.

The outcome

The new platform runs faster, keeps inventory live, and makes B2B ordering and approvals smoother. The catalog is easier to use, and internal teams now trust the system's accuracy.

Faster
Platform performance
Live
Real-time inventory
Smooth
B2B approval flow
Why Redefine Plus Development

Why brands pick Redefine over a general Shopify Plus agency

Most agencies build Shopify stores. Redefine builds Shopify Plus programs. We activate every enterprise capability, integrate your existing systems, and hit a fixed timeline your CTO can hold us to. to.

Fixed 12-week delivery, in writing

Your delivery date is agreed before a line of code is written. No open-ended timelines, no "it depends on scope" retainer billing. Your launch date is real, not aspirational.l, not aspirational.

Checkout extensibility expertise in-house

Checkout UI extensions and Shopify Functions are complex. Most agencies hand them to contractors or skip them. Our in-house team builds and maintains them, so your Plus features ship with the store.

Enterprise resource planning and customer relationship management integration, not a bolt-on

Integration is not an afterthought here. We architect it during discovery, before development starts. Your ERP inventory, CRM data, and WMS routing go live at launch, not month four.

One dedicated project engineer, not a rotating team

Your engineer knows your catalog, systems, and edge cases from discovery through launch. No handoffs to juniors at sprint two. No account manager relaying messages to an offshore team you never meet.

Performance targets baked into the delivery spec

LCP under 2 seconds on mobile. CLS under 0.1. Core Web Vitals in the "Good" range. We confirm all three in QA before launch. Performance is a feature, not a cleanup task.

Full technical handover, not a GitHub zip

Our docs cover every custom component, integration map, Flow config, and Shopify Functions deployment. Your team or next partner can maintain the code without reverse-engineering week-three decisions.

Shopify Plus development questions

Shopify Plus development FAQ

The questions operations leaders and chief technology officers ask before committing to a Shopify Plus development program.

Shopify Plus development programs range from $40,000 to $250,000 depending on scope: a standard theme build with checkout extensions sits at the lower end; a full headless build with multiple enterprise resource planning integrations, B2B channel, and Shopify Flow configuration sits at the higher end. We scope every program precisely and provide a fixed project price before any work begins.

Every migration includes a full data audit, SEO equity preservation, 301 redirect mapping, and a phased go-live plan. We target zero-downtime migrations with revenue continuity from day one.e target zero-downtime migrations with revenue continuity from day one of launch.

Our fixed timeline commitment is built on a precise discovery phase. If delay risk emerges during development due to factors within our control, we absorb the additional resource cost. If scope changes are requested by your team after discovery sign-off, we provide a clear change order with timeline and cost impact before any additional work is done.

Yes. We build headless storefronts using Shopify Hydrogen (React Router) for stores that require custom performance targets, multi-market rendering, or tightly controlled frontend architecture. Hydrogen adds complexity and development time compared to a theme build. We recommend it for stores where the performance or architectural requirements specifically justify the overhead, and advise against it when a well-optimized theme build would deliver the same outcome faster.

Every program includes 48-hour post-launch monitoring, a full technical handover package, and a documented handoff session with your internal team. Ongoing development support is available as a separate retainer engagement, scoped to your specific needs, so you only pay for what your team actually requires after launch. We do not bundle unnecessary maintenance retainers into the base project.

Start your Plus build

Your Shopify Plus development program starts with a scoped brief, not a sales call

Book a 30-minute discovery call. You describe your store, integrations, and Plus needs. Our Shopify Plus developers show how a 12-week program fits your build. You get a rough scope and timeline before any commitment.

Submit your brief → call within 48 hours → scoped proposal in 3 days → Sprint 1 within 1 week of sign-off

Your team spends about 3 to 4 hours a week: one sprint review, async feedback, and a final sign-off. We handle the rest.

12 weeks
Fixed delivery
5 systems
Average integrations
0 hours
Downtime target
Brief received

We will review your workflow and send a scoped proposal within 3 business days.

Tell us about your project
form
Response within 48 hours
Senior review of every brief
Scoped proposal in 3 days
Fixed price, no surprises
60+ stores launched
Enterprise Shopify Plus track record
Full code ownership
Your store, your repository
Enterprise development team collaborating on Shopify Plus architecture in open office with natural light

Get on a call with us to see how we can help you

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