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Get Your Custom WooCommerce Store
20+
Years delivering eCommerce
16
Countries served
400+
Engineers and specialists
ISO
27001 & 9001 Certified
What We Deliver
Custom WooCommerce Development for Seattle Businesses
Seattle knows eCommerce. Amazon, Nordstrom, Costco, and REI are headquartered here. Building a store in this city means competing against the companies that defined modern retail. WooCommerce gives Seattle brands full ownership without monthly revenue share. Your store, your code, your data.
Sigma is in Irvine, CA. Pacific timezone. Builds scoped, priced, and supported.
Full-stack delivery: store setup, theme, plugins, integrations, migration
Dedicated teams and retainer support
Transparent pricing agreed upfront
Our Services
Everything Your WooCommerce Store Needs. One Team. No Handoffs.
WooCommerce Theme Development and UI Enhancements
Seattle shoppers expect Amazon-level speed. Sigma builds WooCommerce storefronts that hold up to that expectation. Fast, clean, easy to buy from.
Custom WooCommerce Development for Business-Specific Commerce
PNW outdoor brand. Seattle tech company adding merch. Washington wholesaler going digital. Each needs different WooCommerce builds. Sigma writes the custom code.
WooCommerce Plugin Development That Solves Real Problems
Sigma builds custom WooCommerce plugins: sustainable shipping calculators, membership tiers, marketplace sync, and features standard plugins don’t cover.
WooCommerce Integrations That Eliminate Manual Work
A Seattle outdoor brand selling DTC, through REI, and on Amazon needs inventory synced. Sigma connects WooCommerce to your ERP, 3PL, and marketplaces.
WooCommerce Migration Without Downtime or Data Loss
Seattle brands move to properly-built WooCommerce without data loss or ranking drops.
PSD to Responsive WooCommerce Conversion
Design files converted into WooCommerce storefronts built to Amazon-adjacent quality.
WooCommerce Maintenance and Support for Ongoing Reliability
Pacific timezone support from Irvine. WordPress updates, security, performance managed.
WooCommerce PWA Development for App-Like Shopping
For Seattle’s mobile shoppers, a PWA gives your WooCommerce store the speed they expect from Amazon’s hometown.
Sigma Edge
The Sigma WooCommerce Edge for Seattle
Lower Risk, Higher Trust
ISO 9001:2015 and ISO 27001:2022
certified delivery
No Platform Lock-In
Open-source WordPress gives you full
ownership and control
Faster Time to Market
Dedicated WooCommerce teams and
agile delivery
Predictable Costs
Transparent pricing. No surprise
invoices
Scalable Architecture
Built to handle traffic growth without
rebuilds
One Partner, End-to-End
Strategy through maintenance,
everything under one roof
Consistent Quality
International coding standards and
proactive support
Proven ROI
20+ years of delivery. 82% repeat
business
Our Stack
Shopify Technologies We Build With
Focused on Shopify-native tools. Nothing added for padding.
WordPress
WooCommerce
PHP / Laravel
WooCommerce REST API
JavaScript / React
Tailwind / Custom CSS
How We Work
Our WooCommerce Development Process
Strategise and Define
Goals, scope, features, customer flows aligned before code
Design and Architect
UX, journeys, information architecture for conversion
Build and Optimise
Custom development with speed, security, and SEO
Launch and Evolve
Deploy, monitor, validate, continuously improve
Why Sigma
Why Seattle Businesses Choose Sigma for WooCommerce
01
Built for revenue, not just for launch
Sigma builds WooCommerce stores that compete in Seattle’s highest-bar eCommerce market.
02
A commerce partner, not just a dev shop
Every recommendation ties to revenue. We match WooCommerce with PNW business models.
03
Fast stores. Fewer lost sales.
Amazon-grade speed expectations. Stores fast enough for shoppers trained by the best.
04
Security and compliance built in
ISO 27001:2022. Washington State compliance and US data privacy built in.
In Production
WooCommerce Work That Shipped
Real projects. Verified outcomes. Full case studies on Sigma’s website.
iReliev (Healthcare)
+62% sales via subscriptions, upsells, A/B testing, and ERP/POS integration.
+62% sales via subscriptions, upsells, A/B testing, and ERP/POS integration.
PlayMakar (Fitness)
+405% revenue with autoship, reseller workflows, and conversion-led UX.
+405% revenue with autoship, reseller workflows, and conversion-led UX.
EduTech (US)
Scaled WooCommerce with ERP, POS, and analytics for faster fulfilment.
Scaled WooCommerce with ERP, POS, and analytics for faster fulfilment.
Trusted by Brands Across 16 Countries
From Melbourne, businesses to global enterprise retailers, Sigma has delivered commerce outcomes that hold.
Frequently Asked Questions
ow can WooCommerce help grow my Seattle online store?
WooCommerce is open-source. Full ownership, no platform fees, 55,000+ plugins. Your store, your code, your customer data.
WooCommerce migration services?
Yes. Shopify, Magento, legacy platforms. Full data protection and SEO preservation.
WooCommerce for large stores?
Yes. With proper architecture and hosting, WooCommerce handles thousands of SKUs and high traffic.
WooCommerce vs Amazon for Seattle brands?
Different tools. WooCommerce gives you a DTC channel you own. Sigma integrates it alongside Amazon so you sell everywhere without losing your customer relationship.
Cost in Seattle?
Depends on scope. Clear number before starting.
Washington compliance?
Automated WA destination-based sales tax. US data privacy standard.
API integrations?
Yes. REST APIs for ERP, CRM, OMS, accounting. Custom API layers when needed.
Why Sigma over Seattle agencies?
ISO security, structured delivery, 400+ engineers, post-launch accountability.