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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 Los Angeles Businesses
Sigma builds Shopify stores for LA’s fashion and streetwear brands, beauty and wellness companies, entertainment and creator economy businesses, and tech startups embedding commerce. Custom Liquid themes, Shopify Plus, drop launch infrastructure, app development, migrations, and post-launch support—delivered by one certified engineering team.
Our global delivery centers give you a structured engineering team with active Shopify certifications. Every build is scoped before code is written, priced before work begins, and supported well past go-live. Sigma doesn’t disappear after launch.
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Full-stack delivery: store setup, theme, apps, integrations, Shopify 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 Handoffs.
From the first design conversation to post-launch performance work, here’s what Sigma actually delivers for LA businesses.
Shopify Store Setup, Theme Development & UI Enhancements
LA brands have a visual standard that most Shopify stores don’t meet. Your audience has spent years following content that looks expensive, and they’ll notice immediately if your storefront doesn’t match that. Sigma builds Shopify storefronts in custom Liquid that load fast, look as good as your brand deserves, and are engineered to convert—not just to exist.
- Responsive Liquid themes built from your brand guidelines—not pulled from a template directory and reskinned
- Custom store setup for B2B and B2C, built around LA consumer behavior and US payment methods including Shop Pay, Afterpay, and Klarna
- SEO-clean, fast-loading code that doesn’t saddle your marketing team with technical problems to fix later
- Mobile-first storefronts connected to your analytics and marketing stack before go-live
Shopify Plus, B2B & Customization Services
LA has a serious wholesale economy underneath its consumer-facing culture. Fashion wholesale in the Fashion District, beauty distribution, entertainment merchandise licensing, and consumer electronics distribution all run on B2B trade relationships that standard Shopify wasn’t designed to handle at scale. Shopify Plus was. Sigma configures it for businesses where wholesale is real revenue, not an afterthought.
- 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 the order volumes LA’s distribution businesses operate at
- Checkout.liquid customization for Plus stores—fewer steps and higher completion rates
Shopify App Development Services
LA brands often have business requirements the app store doesn’t cover well—drop mechanics for limited releases, creator affiliate tracking, digital product delivery alongside physical, age-gated checkout flows for spirits and cannabis-adjacent products. Sigma builds custom Shopify apps for the actual logic your business runs on, not a workaround that breaks under load.
- Custom apps for B2B and B2C workflows that prepackaged solutions don’t handle reliably
- Apps built into Shopify Flow, webhooks, and metafields—part of the platform, not patched onto it
- Performance-optimized code that doesn’t slow the storefront or add page weight
- Embedded analytics and reporting so your team has visibility inside Shopify admin
Shopify App Integration Services
Running Shopify in isolation from your 3PL, your ERP, and your customer data creates manual reconciliation work at every transaction. LA brands scaling fast can’t absorb that overhead. Sigma builds integrations that connect Shopify to your full operation—so inventory, orders, and customer data stay accurate across every system automatically.
- 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 and no manual reconciliation
- Automated workflows that keep data accurate without anyone managing them
- Shopify analytics and conversion tracking configured from go-live so your data is useful from day one
Shopify Support & Maintenance Services
A strong launch is only part of the story. Platform updates break themes, apps conflict, and drop events reveal infrastructure gaps you didn’t know you had. Sigma’s post-launch support catches all of it before your LA customers do—through active monitoring, not reactive ticket management.
- Proactive monitoring and real-time issue resolution—not a support queue reviewed between other projects
- App and platform updates managed before they cause downstream problems
- Regular security audits and performance reviews tied to your revenue goals
- Ongoing CRO and feature development as your store needs to do more
Shopify Migration Services
Most LA brands that come to Sigma for a migration have built years of organic search equity on their current platform and they can’t afford to lose it. That’s the right priority. Sigma has done enough migrations to know exactly where each one fails—URL structure, dirty data, and lost redirects—and how to prevent every failure before the project starts.
- Zero-downtime migrations from Magento, WooCommerce, BigCommerce, or older custom-built platforms
- Full URL redirect mapping so your organic rankings survive the platform switch intact
- Clean, verified transfer of every product, customer record, and order in the database
- Post-migration QA and monitoring—Sigma stays on until everything checks out
Shopify Checkout Customization & Optimization
LA shoppers don’t wait. A checkout that has too many steps, doesn’t offer Afterpay or Klarna, or loads slowly on mobile will lose the sale before you’ve had a chance to complete it. Sigma fixes this at the Shopify Plus level, where the checkout is rebuilt to work the way your buyers actually want to pay—not patched at the theme layer.
- Shopify Plus checkout.liquid customization—Shop Pay, Afterpay, Klarna, Affirm, and BNPL flows built for how US buyers pay
- Store-wide speed optimization, not just checkout-page adjustments
- Infrastructure improvements so high-traffic events—drop launches, Black Friday, Cyber Monday, and LA-specific cultural moments—don’t take the store down
- Funnel analytics and structured A/B testing so every change is backed by real data, not assumptions
Industries
Shopify Stores for LA Businesses
Sigma has commerce delivery experience across the sectors that define LA 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 LA Area business scales.
Why Sigma
Why LA Businesses Choose Sigma for Shopify
LA 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
Sigma aligns Shopify’s capabilities with how your business makes money. Every recommendation has a commercial rationale.
03
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.
04
Security and Compliance That Holds
ISO 27001:2022 certified. Every engagement includes security practices that protect customer data and support compliance with US data privacy requirement across development,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 LA 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 Los Angeles do?
More than most people expect. A Shopify development company builds stores, customizes Liquid themes, develops custom apps for workflows the app store doesn’t cover, connects Shopify to ERP and CRM systems, sets up Shopify Plus for enterprise operations, handles platform migrations, and provides ongoing post-launch support. Sigma delivers all of this from structured delivery centers – not through a freelancer network that 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 handle LA’s fashion drop culture and creator economy commerce requirements?
It does when it’s built for it. Drop mechanics for limited releases need infrastructure that can handle sudden, concentrated traffic spikes without the store going down. Creator and affiliate commerce needs tracking and attribution built into the Shopify flow. Digital product delivery alongside physical. Age-gated checkout flows for regulated product categories. Sigma builds all of this into the store – it doesn’t get added as a workaround later.
How much does Shopify development cost in Los Angeles?
It depends on what you’re building. A branded DTC store for a fashion label is a different scope from a Shopify Plus deployment with drop launch infrastructure, wholesale portal, and custom affiliate tracking. Sigma scopes every project properly and gives you a clear number before work starts. That number doesn’t change when you get the invoice.
Does Sigma understand CCPA and California data privacy requirements?
Yes. Sigma builds every California engagement with CCPA compliance practices built into the data architecture – opt-out mechanisms, data handling documentation, privacy policy integration, and third-party tracking configurations that respect California consumer rights. These aren’t retrofitted at the end. They’re part of the build from the start.
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 LA Shopify developer?
LA has talented Shopify developers and we’re not pretending otherwise. What most local freelancers and smaller agencies can’t offer is ISO 27001:2022 certified security, a structured six-stage delivery process, dedicated QA, and post-launch support that keeps going. 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 accountable after handover.
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 LA business needs.