Shopify Development Agency · USA
Custom Shopify and Shopify Plus stores engineered for conversion. Themes, headless Hydrogen, replatforming, and post-launch CRO — by a US-based Shopify Plus Partner.
Conversion architecture
+38%CVR liftConversion in numbers
200+
Stores launched
+38%
Avg conversion lift
1.4s
Median LCP
Since 2018
Building Shopify
About Conversion
Founded 2018
8 years building Shopify
Shopify Plus Partner
Since 2019
200+ Brands Launched
DTC & B2B
San Francisco, USA
In-house team
Conversion is a Shopify Plus development agency headquartered in San Francisco, serving DTC and B2B brands across the US, Canada, UK, and Australia. We've launched 200+ Shopify and Shopify Plus stores since 2018 — custom Liquid themes, headless Hydrogen, and replatforms from Magento, WooCommerce, and BigCommerce.
What separates us is simple: we treat your store as a revenue system, not a design project. In-house designers, Liquid devs, React engineers, and CRO analysts work in one room — no subcontracting, no handoffs. Every section ships tied to a conversion hypothesis with a measurable lift target.
Why most Shopify builds fail
We've inherited 60+ stalled Shopify projects from freelancers and generalist agencies in the last three years. The same three problems show up every single time.
Generic theme installs with hero sliders, parallax effects, and Figma-pretty animations that look great in a portfolio and tank conversion. We start with funnel data, session recordings, and heatmaps — every section earns its place by lifting a metric.
Bloated apps, render-blocking scripts, hydration loops, and unoptimized Liquid push LCP past 4 seconds and INP into the red. We rebuild on a strict performance budget — sub-1.5s LCP and Core Web Vitals greens by default, on real-world mobile.
Stores get launched, then sit. No A/B testing harness, no analytics layer, no CRO roadmap, no retention plan. We ship every build with experimentation, server-side tracking, and a 90-day optimization roadmap already wired up.
Book a free 30-minute strategy call. We'll teardown your current store and show you the conversion-blocking issues a rebuild would fix.
30-minute call · No commitment · Custom quote in 48 hours
Shopify development services
Full-service Shopify and Shopify Plus development — from custom Liquid theme to headless Hydrogen to checkout extensibility, custom apps, and ERP integrations. We work in Liquid, JavaScript, TypeScript, React, Remix, and Next.js.
Bespoke Shopify themes built from scratch in Liquid — not customized templates. Sectioned 2.0 architecture, theme app extensions, and modular content blocks your merchandising team can edit without breaking the build.
Enterprise-grade Plus builds with checkout extensibility, Shopify Functions, B2B/wholesale, multi-store, and Launchpad automations for high-volume DTC and B2B merchants processing $1M+ GMV.
Headless commerce on Hydrogen + Oxygen, or Next.js consuming the Storefront API. For brands that need editorial-grade content, sub-second LCP, complex personalization, or independent frontend deploys.
Migrations from Magento 1 & 2, WooCommerce, BigCommerce, Salesforce Commerce Cloud (Demandware), Shopware, and custom builds. URL preservation, 301 mapping, and SEO equity protection are non-negotiable.
Public and private Shopify apps when off-the-shelf solutions don't fit your business logic. Built on Remix + Polaris with the modern Shopify App Bridge, GraphQL Admin API, and webhook reliability layer.
Sub-1.5s LCP, INP under 200ms, CLS at zero. We audit, refactor, and rebuild theme code, app stack, image pipelines, and third-party tag managers until Core Web Vitals are green across the entire catalog on real devices.
Full B2B implementations on Shopify Plus — company accounts, customer-specific catalogs, volume pricing, net terms, quote requests, draft orders, and gated checkouts. DTC and B2B running on a single store, not two platforms.
Conversion rate optimization sprints — landing pages, PDP rebuilds, cart and checkout funnel work, exit-intent flows, and personalization. We run continuous A/B tests with statistically significant lift, not opinions.
Post-launch retainer for ongoing CRO experiments, performance tuning, app conflicts, seasonal campaign builds (BFCM), version upgrades, and security patching. Pay-on-results growth model available.
Industries we serve
We've built and scaled Shopify and Shopify Plus stores across the verticals that drive US ecommerce — from fast-moving DTC to regulated B2B.
Lookbook-led PDPs, size guides, returns flows, drop launches, and merchandising automation. Built to handle BFCM-scale traffic without buckling.
Quiz funnels, ingredient deep-dives, subscription-first PDPs (Recharge, Skio), bundle builders, and Klaviyo flows that lift LTV.
FDA-friendly claims architecture, subscription bundles, recurring billing, and trust-signal-heavy PDPs that pass compliance review.
Subscriptions, perishable shipping logic, multi-pack PDPs, store locators, and high-velocity BFCM builds.
Catalog-heavy collection pages, room-set imagery, AR product views, and white-glove delivery integrations for furniture brands.
High-AOV checkout flows, financing integration (Affirm, Klarna), bespoke product configurators, and editorial-grade Hydrogen builds.
Configurators, comparison tables, technical spec sheets, warranty flows, and post-purchase upsell that lifts AOV by 12-22%.
Shopify Plus B2B with company accounts, net terms, custom catalogs, quote-to-order, and ERP-driven inventory feeds.
Age-gating, geo-restriction, payment-processor compliance, and content moderation for restricted verticals on Shopify and headless.
Sizing tools, pre-order and waitlist flows, gear bundles, and seasonal collection launches built for traffic spikes.
Quiz-driven sub onboarding, recurring shipments, dietary preferences, and lifecycle Klaviyo flows that lower churn.
Print-on-demand integrations, artist royalty engines, custom configurators, and licensing-aware checkout.
Talk to a Shopify Plus engineer about your build. Quotes within 48 hours, fixed scope, and a measurable lift target on day one.
30-minute call · No commitment · Custom quote in 48 hours
Our development process
CRO audit, technical audit, and analytics review. We surface every conversion-blocking bottleneck and set a measurable lift target — not just deliverables. Output: written strategy doc and roadmap.
Wireframes and high-fidelity visual design tied to conversion hypotheses. Theme architecture, component library, content model, and integration map — designed to be edited by your team.
Custom Liquid or Hydrogen development, Shopify app and integration work, ERP/PIM/3PL hookups, payment gateways, search, reviews, subscriptions, and pre-launch QA across devices.
Phased launch with real traffic, GSC + GA4 monitoring, performance verification on real devices, then we wire up A/B testing and start the CRO sprint cycle. The store keeps getting better, week over week.
How we compare
A side-by-side look at what you actually get from a freelancer, a generalist agency, and Conversion.
Shopify case studies
Shopify Plus — Skincare DTC
+340%
ROAS lift
“They rebuilt our PDP architecture, fixed our app stack, and the conversion rate moved within the first 30 days. The Hydrogen migration paid for itself in 4 months.”
Shopify — DTC apparel
−62%
LCP reduction
“Our previous theme buckled at 3× normal traffic. Conversion's rebuild handled BFCM with sub-1.2s LCP and zero errors. Best Black Friday we've ever had.”
Shopify Plus — Industrial B2B
+184%
B2B revenue
“We were running B2B on Magento and DTC on Shopify. Conversion consolidated us onto Plus with B2B catalogs, custom net terms, and a checkout that actually works for our buyers.”
Most calls end with a number — we run a quick model on your traffic and AOV to estimate the revenue lift a rebuild would unlock.
30-minute call · No commitment · Custom quote in 48 hours
What founders say
We had three agencies pitch us. Conversion was the only one who walked in with a teardown of our existing PDP and a hypothesis-driven roadmap. 90 days later we were doing 3.4× the revenue.
Lauren K.
Founder & CEO · DTC Skincare Brand
The Magento → Shopify Plus migration was flawless. URL parity, structured data, redirects — every detail handled. Organic traffic actually went up 18% in the 60 days post-launch.
Daniel R.
Head of Ecommerce · Industrial B2B Manufacturer
They don't ship pretty themes. They ship stores that convert. The CRO retainer alone has paid for itself five times over. We finally have a partner, not a vendor.
Priya M.
VP Digital · Health & Supplement Brand
Hydrogen build delivered in 14 weeks. LCP went from 4.2s to 1.1s. Our editorial team can finally publish without an engineering ticket. This was the right rebuild.
Marcus T.
CTO · Lifestyle DTC
We came off a freelancer disaster — three months over and a broken theme. Conversion took over, scoped a recovery in 48 hours, and shipped a stable Plus store six weeks later.
Sara J.
Founder · Apparel DTC
I've worked with five Shopify agencies in ten years. This is the first one where the engineers, designers, and CRO people are actually in the same room. The output speaks for itself.
Jordan W.
Director of Ecommerce · Beverage Brand
Why Conversion
Direct line to Shopify's launch engineers, early access to Functions, checkout extensibility, Hydrogen, and Commerce Components. Your build benefits from the platform's roadmap before it ships publicly.
Every section, every component, every interaction is tied to a conversion hypothesis with a measurable lift target. We don't ship pretty stores — we ship stores that convert and keep converting.
Designers, Liquid devs, React engineers, performance specialists, CRO analysts, and project leads work in one room from our San Francisco HQ. Fewer handoffs, faster iteration, better outcomes.
After launch, you can move into our pay-on-results growth retainer. We earn fees only when revenue grows. No flat retainers. No upfront. The incentive structure that aligns us with your P&L.
Most agencies sell you what they can build. We pick the architecture — Liquid, Hydrogen, or Next.js — based on your traffic profile, content needs, team capacity, and total cost of ownership.
We've migrated 80+ stores onto Shopify with zero ranking loss. Detailed URL mapping, 301 redirect chains, structured data preservation, and 90-day Search Console monitoring built into every plan.
What you walk away with
Every Conversion engagement ships with these artifacts in your hands — yours to keep, edit, and own.
One call. One audit. A clear plan with timelines, scope, and a revenue lift target. No retainers. No upfront commitment.
30-minute call · No commitment · Custom quote in 48 hours
Frequently asked
Related services
Most Conversion clients run all three workstreams with us — fewer handoffs, one P&L, one team accountable for the revenue number.
Need headless? Hire our Shopify Hydrogen agency to ship production storefronts on Hydrogen + Oxygen — sub-1.5s LCP, multi-region, CMS-integrated, zero-loss Liquid migrations.
ExploreTechnical SEO, collection page optimization, schema, content, and AI search (GEO) for Shopify stores. Built on top of every Conversion build.
ExploreMeta + TikTok ads, Google, Klaviyo email/SMS, and CRO sprints engineered to scale Shopify and Shopify Plus DTC brands profitably.
ExploreReady to build?
Book a free 30-minute strategy call. We'll review your current store, identify the conversion-blocking issues, and show you exactly what a rebuild — or a CRO sprint — would lift in revenue over the next 90 days.
No credit card · No commitment · Pay only on results