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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 Seattle Businesses
Sigma builds Shopify stores for Seattle’s outdoor and apparel brands, food and coffee companies going direct, healthcare businesses, and tech founders launching commerce ventures. Custom Liquid themes, Shopify Plus for B2B and wholesale, subscription configuration, integrations, migrations, and post-launch support – one certified team, end to end.
Every project is scoped and priced before work starts. Our engineers hold active Shopify Foundations and Liquid Storefronts certifications. Sigma stays on after launch with retainer-based support – the team that built it is the team that maintains it.
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Full-stack delivery: store setup, theme, apps, integrations, Plus -
Dedicated teams and retainer support -
Transparent pricing agreed upfront
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 your first design conversation to ongoing post-launch performance work, here’s what Sigma delivers for Seattle businesses.
Shopify Store Setup, Theme Development & UI Enhancements
Seattle consumers are discerning. They support independent brands, they care about authenticity, and they’ll notice immediately if your online store looks like it was built from a shared template. The visual standard here is higher than most markets—partly because of the design culture, partly because shoppers know what thoughtful work looks like. Sigma builds Shopify storefronts in custom Liquid that load fast, reflect your brand faithfully, and are built to convert from the first session.
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Responsive Liquid themes built from your brand identity—not adapted from a shared template library -
Custom Shopify store setup for B2B and B2C, built around Pacific Northwest consumer behavior and US-native payment methods including Shop Pay, Afterpay, and Klarna -
SEO-clean, performance-optimized code that doesn’t leave technical debt for your marketing or engineering team -
Mobile-first storefronts fully connected to your analytics and marketing stack before the store goes live
Shopify Plus, B2B & Customization Services
Seattle has a meaningful B2B layer beneath its consumer-facing commerce—outdoor gear distributors managing hundreds of retail accounts, food and beverage wholesalers running trade programs across the Pacific Northwest, healthcare distributors with compliance-sensitive procurement requirements. Standard Shopify wasn’t built for that. Shopify Plus was. Sigma configures it properly for businesses where trade is a serious revenue channel.
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B2B trade portals with custom logins, tiered pricing, role-based access, and catalog restrictions per buyer segment -
Shopify Plus enterprise setup for omnichannel operations—DTC, wholesale, and retail running from one platform -
Workflow automation and backend integrations built to handle Pacific Northwest distribution volumes -
Checkout.liquid customization for Plus stores—fewer steps, higher order completion rates
Shopify App Development Services
Seattle brands often arrive with specific operational requirements that prepackaged apps don’t satisfy—custom subscription logic for coffee and consumables, gear rental workflows alongside retail, complex loyalty programs for outdoor and adventure brands, and internal tool integrations for tech-native businesses that have built their own systems. Sigma develops custom Shopify apps around the workflows your business actually runs on.
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Custom apps for B2B and B2C workflows that prepackaged solutions don’t address reliably -
Apps built into Shopify Flow, webhooks, and metafields—part of the system, not layered on top of it -
Performance-optimized code that adds no storefront latency or page weight -
Embedded analytics and reporting so your team has real visibility inside Shopify admin
Shopify App Integration Services
Running Shopify disconnected from your ERP, your 3PL, and your CRM creates manual work that compounds with every order. Seattle businesses scaling quickly can’t absorb that overhead. Sigma builds integrations that connect Shopify to your entire operation—so inventory, orders, and customer data stay accurate everywhere automatically.
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ERP, POS, CMS, CRM, and US payment gateway integrations including Stripe, Shop Pay, Klarna, and Affirm -
Real-time order, inventory, and customer data sync—no end-of-day exports, no reconciliation spreadsheets -
Automated workflows that keep data accurate without constant oversight -
Shopify analytics and conversion tracking configured before go-live so your data is useful from day one
Shopify Checkout Customization & Optimization
Seattle buyers are deliberate shoppers who abandon checkout quickly when the experience doesn’t hold up—missing payment options, too many steps, or a mobile experience that breaks under real-world conditions. Sigma addresses this at the Shopify Plus level, where the checkout can be rebuilt around your buyers rather than adjusted at the surface.
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Shopify Plus checkout.liquid customization—Shop Pay, Afterpay, Klarna, Affirm, and BNPL flows built for how US buyers pay -
Store-wide performance optimization, not just checkout-page fixes -
Infrastructure improvements so high-traffic periods—Black Friday, Cyber Monday, REI-adjacent gear season, and Seattle-specific cultural launches—don’t create downtime -
Funnel analytics and structured A/B testing so every optimization is backed by data
Shopify Migration Services
Seattle businesses running on legacy platforms come to Sigma with the same priority: they’ve built years of organic search equity and they can’t afford to lose it in a platform switch. That’s exactly the right thing to protect. Sigma has run enough migrations to know every failure point and how to prevent them before the project starts.
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Zero-downtime migrations from Magento, WooCommerce, BigCommerce, or older custom-built platforms -
Full URL redirect mapping so organic search rankings hold through the transition -
Clean, verified transfer of every product, customer record, and order in the database -
Post-migration QA and monitoring—Sigma stays on until everything is confirmed working
Shopify Support & Maintenance Services
A well-launched store still needs ongoing attention. Platform updates create compatibility issues, apps deprecate, and traffic events reveal performance gaps that weren’t visible at lower volumes. Sigma’s post-launch support catches all of it before your Seattle customers notice anything—through proactive monitoring rather than reactive ticket management.
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Proactive monitoring and real-time issue resolution—not a support inbox reviewed at the end of the workday -
App and platform updates managed before they cause downstream problems -
Regular security audits and performance reviews aligned to your revenue targets -
Ongoing CRO and feature development as your Seattle business grows
Industries
Shopify Stores for Seattle Businesses
Sigma has commerce delivery experience across the sectors that define Seattle 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 Seattle 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.
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App Development & Integration
Custom apps, ERP connections, payment integrations—built and tested as a complete working system, not assembled in the last sprint.
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Quality Assurance & Testing
Full performance, security, cross-browser, and cross-device testing before launch. Your customers don’t find the bugs.
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Store Launch & Deployment
Go-live is a planned, monitored event. Sigma handles deployment and stays on top of the first 48 hours.
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Ongoing Maintenance & Optimization
Sigma doesn’t exit after launch. We stay on—monitoring, optimizing, and building as your Seattle business scales.
Why Sigma
Why Seattle Businesses Choose Sigma for Shopify
Seattle expects substance from its partners – not just capability claims. Here’s what Sigma actually brings to a Shopify engagement.
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.
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A commerce partner, not a code vendor
Sigma aligns Shopify’s capabilities with how your business makes money. Every recommendation has a commercial rationale.
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Fast stores. Fewer abandoned sessions.
Page speed and checkout friction directly affect revenue. Sigma builds stores that load fast and don’t place unnecessary obstacles between a buyer and a completed order.
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Security and compliance that stands up
ISO 27001:2022 certified. Every engagement includes security practices that protect customer data and support compliance with the New Zealand Privacy Act 2020.
Certifications
Certified. Not Just Claiming to Be.
Seattle’s business community values substance over claims. These aren’t borrowed partner logos. They’re 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 Seattle do?
More than most 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 that varies by 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 held by the engineers who do the actual work. 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 behind it. 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 Seattle’s outdoor, food, coffee, and tech commerce brands?
Very well – and each category has different requirements. Outdoor and gear brands need subscription support, gear rental workflows alongside retail sales, and B2B portals for wholesale accounts with dealers. Food and coffee brands going direct need subscription and recurring order logic, compliance messaging for regulated categories where applicable, and 3PL integrations for efficient fulfillment. Tech-founded commerce brands often need custom integrations with internal tools. Sigma has delivered for all three and knows the configuration differences in advance.
How much does Shopify development cost in Seattle?
It depends on what you’re building. A branded DTC store for a local outdoor brand is a different project from a Shopify Plus deployment with wholesale portals, subscription logic, and ERP integration. Sigma scopes every project carefully, provides a clear estimate before work starts, and holds to it. No round numbers that expand when you get the invoice.
Can Sigma support both DTC and wholesale distribution 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 distributors and dealers. Sigma has built this for Pacific Northwest brands running both channels and understands where the complexity sits before the build begins.
Can Sigma build a headless Shopify store?
Yes. Sigma builds headless storefronts on React and Next.js using the Shopify Storefront API – a good fit for Seattle tech founders embedding commerce into an existing product, or outdoor and lifestyle brands that need full design control and maximum page performance. Being honest: headless adds real architectural complexity and ongoing maintenance requirements. Sigma will tell you whether it actually fits your situation before recommending it.
Why choose Sigma over a local Seattle Shopify developer?
Seattle has strong technical talent and we’re not dismissing that. 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 months after launch.
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 Wellington business needs.