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20+
Years delivering eCommerce
16
Countries served
400+
Engineers and specialists
ISO
27001 & 9001 Certified
What We Deliver
Certified Shopify Development for New York Businesses
Sigma builds, migrates, and scales Shopify stores for New York’s fashion, beauty, DTC, and wholesale businesses. Custom Liquid themes, Shopify Plus configuration, ERP and payment integrations, app development, and platform migrations—delivered by certified Shopify engineers with more than 20 years of commerce delivery experience.
Every engagement is scoped before it starts, priced in writing, and supported after launch. Your assigned team holds active Shopify certifications—Foundations and Liquid Storefronts—and stays on the project from discovery through to post-launch support.
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Full-stack delivery: store setup, theme, apps, integrations, Shopify Plus -
Dedicated teams and ongoing retainer support -
Transparent pricing agreed upfront before work begins
Our Stack
Shopify Technologies We Build With
Focused on Shopify-native tools. Nothing added for padding.
Shopify
Shopify Plus
Liquid
Storefront API
Admin API
Our Services
Everything Your Shopify Store Needs. One Team. No Gaps.
From the first design conversation to ongoing post-launch performance work, here’s what Sigma delivers for New York businesses.
Shopify Store Setup, Theme Development & UI Enhancements
New York shoppers are highly brand-aware and quick to judge. If your store feels generic, they leave instantly. Sigma builds custom Shopify storefronts using Liquid that are fast, visually aligned with your brand, and optimized for conversions—not just launch.
- Custom responsive Liquid themes built from your brand guidelines
- Complete Shopify setup for B2B and B2C with US payment integrations
- SEO-friendly and speed-optimized development
- Mobile-first design with analytics integration before launch
Shopify Plus, B2B & Customization Services
New York’s wholesale ecosystem demands more than standard Shopify capabilities. Sigma configures Shopify Plus to support complex B2B operations with precision and scalability.
- B2B portals with tiered pricing and restricted catalogs
- Omnichannel setup for DTC, wholesale, and retail
- Automation and integrations for high-volume operations
- Checkout customization for improved conversions
Shopify App Development Services
When off-the-shelf apps fall short, Sigma builds custom Shopify apps tailored to your business logic and workflows.
- Custom apps for unique B2B and B2C needs
- Integration with Shopify Flow, webhooks, and metafields
- Performance-optimized development
- Built-in analytics and reporting
Shopify App Integration Services
Disconnected systems slow down operations. Sigma connects Shopify with your entire tech stack for seamless data flow.
- ERP, CRM, POS, and payment integrations
- Real-time data synchronization
- Automated workflows
- Analytics setup before launch
Shopify Checkout Customization & Optimization
Checkout is where conversions happen—or fail. Sigma optimizes Shopify Plus checkout for speed, simplicity, and higher completion rates.
- Custom checkout with multiple payment options
- Full-site speed optimization
- High-traffic performance readiness
- A/B testing and funnel analytics
Shopify Migration Services
Migrating platforms without losing SEO or data is critical. Sigma ensures smooth, secure transitions to Shopify.
- Zero-downtime migrations
- Complete URL redirect mapping
- Accurate data transfer
- Post-migration QA and monitoring
Shopify Support & Maintenance Services
Your store needs continuous optimization after launch. Sigma provides proactive support to keep everything running smoothly.
- Real-time monitoring and issue resolution
- Managed updates and compatibility fixes
- Security audits and performance checks
- Ongoing CRO and feature enhancements
Industries
Shopify Stores for New York Businesses
Sigma has commerce delivery experience across the sectors that define New York’s market.
Government and Procurement
Compliant trade portals and digital services
Creative and DTC Brands
Fashion, homewares, and design-led retail
Food and Hospitality
Specialty food, restaurant merchandise, and D2C
Technology
Commerce embedded into digital products
Professional Services
B2B trade and service-based commerce
Health and Wellness
Supplements, skincare, and compliant retail
B2B and Wholesale
Trade portals and multi-tier pricing
Education and Publishing
Digital products and subscription models
How We Work
Our Shopify Development Process
No black boxes. No shifting estimates. Every Sigma project follows a six-stage delivery process that keeps SF clients informed and on schedule.
01
Discovery & Strategy
We start with your customers, your systems, and your commercial goals—before any code is written. The brief drives every decision.
02
Theme Design & Customization
Custom or enhanced Shopify themes built for speed and conversion on every device. Design is approved before it goes to engineering.
03
App Development & Integration
Custom apps, ERP connections, payment integrations—built and tested as a complete working system, not assembled in the last sprint.
04
Quality Assurance & Testing
Full performance, security, cross-browser, and cross-device testing before launch. Your customers don’t find the bugs.
05
Store Launch & Deployment
Go-live is a planned, monitored event. Sigma handles deployment and stays on top of the first 48 hours.
06
Ongoing Maintenance & Optimization
Sigma doesn’t exit after launch. We stay on – monitoring, optimizing, and building as your New York business scales.
Why Sigma
Why New York Businesses Choose Sigma for Shopify
New York has no shortage of Shopify developers. What it does have a shortage of is certified partners who deliver properly, stay accountable, and don’t disappear after handover.
01
We build for revenue, not just for launch
Going live is the beginning. Sigma designs stores to convert traffic into buyers and keeps improving performance after the store is running.
02
A commerce partner, not a code vendor
Every recommendation Sigma makes has a commercial reason behind it. We align Shopify’s capabilities with how your business makes money – not with what’s technically interesting to build.
03
Fast stores. Fewer abandoned sessions.
Page speed and checkout friction are direct revenue variables. Sigma builds Shopify stores that load fast, work on every device, and don’t place obstacles between a New York buyer and a completed purchase.
04
Security and compliance that stands up
ISO 27001:2022 certified. Every engagement includes security practices that protect customer data and support compliance with US and New York State data privacy requirements – through development, staging, and production.
Certifications
Certified. Not Just Claiming to Be.
In a city where people know what engineering credentials actually mean, we’d rather show them than talk about them. These are active certifications held by the engineers on your project.
Shopify Partner
Shopify Certified Foundations
Certified Liquid Storefronts
Trusted by Brands Across 16 Countries
From Wellington businesses to global enterprise retailers, Sigma has delivered commerce outcomes that hold.
In Production
Shopify Work That Shipped
Real projects. Verified outcomes. Full case studies on Sigma’s website.
Australia – Beauty and Retail
Napoleon Perdis Left Behind a Legacy Platform and Moved to Shopify Plus
Napoleon Perdis is a well-known Australian cosmetics brand sold across New Zealand too. Sigma migrated them to Shopify Plus, improving store performance and cutting maintenance overhead.
Improved performance, reduced maintenance cost
USA – B2C / Subscription
Fire Department Coffee Needed Subscriptions, Wholesale, and Accessibility
This US brand had three firm requirements for a single Shopify build: subscriptions, wholesale, and WCAG accessibility. Sigma delivered all three without cutting corners.
Subscriptions, wholesale, and accessibility – one build
Romania – Multi-Store Plus
50+ Shopify Plus Stores, No Real-Time Stock Visibility – Sigma Solved Both
A global beauty brand running 50+ Shopify Plus stores with inventory errors. Sigma unified inventory management and automated workflows across every location.
100% real-time stock accuracy across 50+ locations
Frequently Asked Questions
What does a Shopify development company in New York actually do?
More than most people expect going in. A Shopify development company builds stores, customizes Liquid themes, develops custom apps for workflows the app store doesn’t handle well, connects Shopify to ERP and CRM systems, configures Shopify Plus for enterprise requirements, handles platform migrations, and provides ongoing post-launch support. Sigma delivers all of this from structured delivery centers – not a freelancer network where the team changes with every project.
What Shopify certifications does Sigma hold?
Sigma is an active Shopify Partner with certifications in Shopify Foundations and Certified Liquid Storefronts for Theme Developers – earned and maintained by the engineers who do the actual work, not held at the company level and separate from the project team. Beyond those: Adobe Solution Partner (Bronze), AWS Certified Partner, Microsoft Silver Partner, ISO 27001:2022, and ISO 9001:2015. All actively renewed.
Can Sigma migrate our existing store to Shopify?
Yes – and it’s a process Sigma has run many times with a clear methodology. We migrate from Magento, WooCommerce, BigCommerce, and older custom-built platforms to Shopify and Shopify Plus. Every URL redirect is mapped to protect your organic rankings. All product data, customer records, and order history come across completely. You don’t discover what’s missing after go-live.
Does Shopify work well for New York’s fashion, beauty, and DTC brands?
Very well – especially at the Plus tier for brands managing any volume or complexity. Fashion brands get conversion-optimized storefronts, wholesale functionality for trade accounts, and checkout flows that keep up with buyers who are comparing across multiple tabs. Beauty and DTC brands get subscription support, loyalty integrations, and launch infrastructure that doesn’t fall apart when ten thousand people hit the site at the same time. Sigma has built for all of these use cases.
How much does Shopify development cost in New York?
It depends on what you’re building. A branded DTC launch store is a different project from a Shopify Plus migration with wholesale portal, ERP integration, and custom app development. Sigma scopes every project carefully, gives you a clear number before work starts, and holds to it. No estimates that grow by the time you see the invoice.
Can Sigma support both DTC and wholesale from a single Shopify store?
Yes. Shopify Plus supports both channels from one platform – a full DTC storefront for direct customers and a B2B portal with custom logins, tiered pricing, catalog restrictions, and wholesale ordering workflows for trade accounts. Sigma has built this for New York brands running both channels and understands exactly where the complexity sits in advance.
Can Sigma build a headless Shopify store?
Yes. Sigma builds headless storefronts on React and Next.js using the Shopify Storefront API – suited to New York tech companies embedding commerce into an existing product, or fashion and luxury brands that need full design control and maximum page performance. Being honest about it: headless adds real architectural complexity and ongoing maintenance overhead. Sigma will tell you whether it genuinely fits your situation before recommending it.
Why choose Sigma over a local New York Shopify developer?
New York has talented Shopify developers – we’re not pretending otherwise. What most local freelancers and smaller agencies can’t offer is a structured six-stage delivery process, dedicated QA, enterprise-grade security, and sustained post-launch support. Sigma is a certified Shopify Partner with 20+ years of commerce delivery and 400+ specialists across four delivery centers. You get a team that’s still accountable six months after launch – not just on launch day.
Ready to Start?
Let’s Build a Shopify Store That Sells
Talk to a Sigma Shopify specialist. No pitch decks, no obligation—just a direct conversation about what your New York business needs.