A California Shopify Agency for Enterprise Commerce
SDG is a California Shopify agency and Shopify Platinum Partner, engineering enterprise commerce since 2006. With teams in Los Angeles and San Francisco, we serve brands across the state, from DTC startups in the Bay Area to national retailers headquartered in SoCal.
Trusted by brands that define their categories
A California Shopify agency since 2006
SDG (Spiegel Design Group) has engineered commerce on Shopify since 2006, longer than almost any agency in California or anywhere. Headquartered in Los Angeles with a team in San Francisco, we have built for some of the most recognized brands in the world while staying rooted in the state we call home.
Enterprise depth, from LA to the Bay
We are a Shopify Platinum Partner, the platform's highest tier, and a Shopify Build Award winner for our work on Glossier. The senior team that scopes your project is the team that builds it, no junior hand-offs. It is the depth behind work like our Barnes & Noble replatform, available to California brands north and south.
Serving brands across the state
From Los Angeles and Orange County to San Diego, the Bay Area, and Silicon Valley, we work with California brands at every stage. As a full-service agency we cover the entire Shopify lifecycle: UX/UI design, theme and headless development, replatforming and migration, systems integration, SEO, CRO, accessibility, and ongoing support. Explore our Los Angeles and San Francisco practices or our full Shopify services.
Why work with a California Shopify partner
A California-based partner means real-time collaboration in Pacific time, in-person working sessions when they matter, and a team that understands the market your brand competes in. The reach is anything but local: we deliver for enterprise clients nationally and internationally. Browse our case studies or our Shopify Plus practice.
Everything your store needs, from one senior team
SDG is a full-service Shopify partner. The same senior engineers and designers behind enterprise replatforms also take on focused projects, ongoing support, and everything in between — for brands large and small. One accountable team, end to end.
Strategy & architecture
Roadmaps, technical architecture, and platform decisions grounded in nearly two decades on Shopify.
UX/UI design
Brand-led storefront design and interface work, engineered to convert as well as it looks.
Storefront development
Theme and fully custom front-end builds, from a single template to a complete storefront.
Headless & composable
Hydrogen, Oxygen, and custom React storefronts engineered to hit performance budgets others miss.
Replatforming & migrations
Moves onto Shopify and Shopify Plus without downtime or data loss, including the largest catalogs in retail.
Systems & data integration
ERP, OMS, PIM, CRM, and bespoke middleware — the back-office systems global retail runs on.
Performance engineering
Core Web Vitals, speed, and reliability treated as a baseline, not an afterthought.
Shopify SEO
Technical SEO, site architecture, and structured data so the right buyers find your store.
CRO & experimentation
Conversion-rate optimization and A/B testing that turn existing traffic into more revenue.
Support & retainers
Ongoing monthly support, maintenance, and enhancement — a senior team on call for your store.
Accessibility
WCAG-compliant builds and audits, so your storefront works for every customer.
Apps & custom functionality
Custom Shopify apps, checkout extensions, and bespoke features the platform doesn’t ship out of the box.
Frequently asked questions
Are you a California Shopify agency?
Yes. SDG is a California Shopify agency and Shopify Platinum Partner, building on Shopify since 2006, with teams in Los Angeles and San Francisco serving brands across the state and worldwide.
Where in California are you located?
Our headquarters is in Los Angeles, at 11693 San Vicente Blvd., Suite 501, and we have a team in San Francisco. We work with brands throughout California and beyond.
Do you work with brands in San Diego, Orange County, or the Bay Area?
Yes. We work with California brands statewide, including Los Angeles, Orange County, San Diego, San Francisco, and Silicon Valley, as well as clients nationally and internationally.
What makes SDG different from other California Shopify agencies?
Tenure and depth. We are a Shopify Platinum Partner and Build Award winner with nearly two decades on the platform, staffed by senior engineers who take on the enterprise builds most agencies decline.
Are you a Shopify Plus agency in California?
Yes. SDG is a Shopify Plus and Platinum Partner based in California, engineering enterprise Shopify Plus builds, replatforms, and integrations for brands across the state.
Do you take on smaller projects, or only enterprise builds?
Both. We are known for enterprise work, but we size each engagement to the actual scope, from a single feature to a complete replatform. Many California brands start small and grow with us.