Shopify development services for brands that sell

Udundi is a Certified Shopify Plus Partner agency delivering end-to-end Shopify development—custom themes, app development, platform migrations, SEO, CRO, and ongoing support. Every service is handled in-house by a senior US-based team with over a decade of eCommerce expertise.

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The numbers behind our Shopify development work

Over a decade of building, migrating, and optimizing Shopify stores for brands across every vertical. Every metric reflects in-house work by a team that has grown alongside the platform.

Years of Shopify expertise

Custom themes built

Custom apps developed

Client satisfaction rate

Why brands choose Shopify—and why they choose us to build it

Shopify powers more than four million stores worldwide. Its extensibility, app ecosystem, and headless capabilities make it the platform of choice for brands at every stage—from first launch to nine-figure revenue. But the platform is only as good as the team building on it. Udundi combines deep Shopify expertise with conversion-focused design and development to turn your store into a sales engine, not just a storefront. We have been a Certified Shopify Plus Partner since before Plus went mainstream, and every project we take on is staffed with senior practitioners who do the work themselves—no outsourcing, no juniors learning on your dime.

Full-service Shopify development under one roof

Every discipline your Shopify store needs—design, development, optimization, and strategy—delivered by the same in-house team. No hand-offs, no fragmented accountability.

Custom Shopify theme development

Your storefront is your most important piece of brand infrastructure. We design and build fully custom Shopify themes from scratch—performance-optimized, conversion-led, and engineered for the catalog scale, traffic spikes, and merchandising complexity that growing brands encounter daily. Every theme ships with accessibility, mobile-first layouts, and sub-second load times as non-negotiables.

Full custom theme design & build
Theme customization & modifications
Performance optimization & speed

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Shopify Plus development

Custom checkout experiences, Plus-only APIs, Flow automation, B2B and wholesale, expansion stores, and enterprise integrations—Udundi is a Certified Plus Partner that unlocks everything the enterprise tier offers.

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Custom Shopify app development

When off-the-shelf apps fall short, we build custom private and public Shopify apps—API integrations, data sync, custom shopping experiences, fulfillment logic, and advanced checkout functions—backed by 180+ apps shipped.

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Shopify platform migrations

Migrating from Magento, BigCommerce, WooCommerce, Squarespace, or another platform? We handle end-to-end migrations—product and customer data, SEO preservation, theme build, integrations, and training—so there is zero downtime and zero lost rankings.

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Shopify store setup

Launching a new Shopify store from scratch? We handle everything from initial configuration and product setup to theme customization, app installation, SEO foundations, and go-live strategy—so your store is optimized from day one.

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Shopify SEO services

Organic traffic is the most profitable channel for most Shopify stores—and the one most often ignored during development. We provide full technical and on-page SEO: audits, schema markup, content strategy, link building, local SEO, and ongoing monitoring across 450+ stores optimized for search.

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CRO & A/B testing

Design and code mean nothing if visitors do not convert. Our CRO retainer pairs behavioral research, UX experimentation, and in-house engineering to run structured A/B tests that improve your funnel month over month—with full transparency on every result and a measurable impact on revenue.

Learn about CRO & A/B testing →

Ongoing support & maintenance

Shopify stores need continuous attention—bug fixes, app updates, performance monitoring, platform changes, and strategic guidance. Our retainer model gives you a dedicated in-house team with flexible monthly hours from 5 to 100+.

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Shopify content writing

SEO-optimized copy for product descriptions, collection pages, blogs, brand stories, and email—written by in-house eCommerce copywriters who understand search intent, the Shopify ecosystem, and what makes buyers click "add to cart."

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Shopify marketing services

Full-service Shopify marketing—email automation, retention programs, content strategy, and channel expansion—so your store does not just look great but grows revenue long-term through every customer touchpoint.

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Why brands choose Udundi as their Shopify development agency

There are thousands of Shopify agencies. Here is what makes Udundi different—and why our clients stay.

Certified Shopify Plus Partner

Udundi holds Certified Shopify Plus Partner status—a designation that requires verified expertise across a breadth of Shopify services. Your brand benefits from direct partner-level access, beta features, and insight that standard agencies simply do not have.

100% in-house, US-based team

Every strategist, designer, developer, and SEO specialist on your project is a full-time Udundi employee. No outsourcing, no account teams filtering your communication—just senior practitioners doing the work with direct accountability.

10+ years of Shopify depth

Founded in 2012, Udundi has grown alongside the Shopify platform—through every major architecture change, API expansion, and ecosystem shift. We are not learning on your time. We bring battle-tested solutions from having built hundreds of stores at every scale.

Conversion-first mindset

Everything we build—themes, apps, checkout flows, integrations—is evaluated through a conversion lens. We measure success by the revenue impact for your business, not by hours logged. An 18–25% average sales increase post-launch across our theme projects is the standard we hold ourselves to.

Long-term partnership model

Most of our clients have been with us for years—not because they are locked in, but because our retainer model delivers continuous value. Flexible monthly hours across development, design, SEO, and CRO mean you always have the right expertise available when your business demands it.

How our Shopify development process works

Whether it is a full store build, a platform migration, or a monthly retainer—every engagement follows the same disciplined process.

Discovery & strategy

We start with a deep dive into your business goals, current tech stack, analytics, and competitive landscape. The output is a clear scope document with priorities, timelines, and success metrics—before a single line of code is written.

Design & architecture

Our in-house designers create high-fidelity mockups rooted in conversion best practices, brand consistency, and mobile-first thinking. Developers architect the technical solution in parallel—integrations, data flows, and performance targets.

Development & QA

Code is written in sprint cycles with continuous staging previews. Every build goes through cross-browser testing, performance benchmarking, accessibility checks, and client review before anything reaches production.

Launch & ongoing growth

We handle the launch and monitor everything closely in the post-go-live window. Most clients transition to a monthly retainer—continuous development, SEO, CRO, and support—so the store keeps improving, not just maintaining.

Shopify development FAQs

What Shopify development services does Udundi offer?

Udundi offers comprehensive Shopify development services including custom theme development, private and public app development, platform migrations, store setup, SEO, CRO and A/B testing, Shopify Plus consulting, content writing, marketing, and ongoing support retainers. Every service is delivered in-house by our senior US-based team.

How much does Shopify development cost?

Cost varies significantly based on scope. A store setup or theme customization starts at a different price point than a full custom theme build with custom app development and complex integrations. Retainers range from 5 to 100+ hours per month. The best way to get an accurate quote is to reach out—we provide detailed scopes and transparent pricing after an initial discovery conversation.

How long does a Shopify store build take?

A standard store setup typically takes 2–4 weeks. A full custom theme with integrations and content typically runs 8–16 weeks depending on complexity. Platform migrations vary based on the source platform and data volume. We provide a detailed timeline during discovery and keep you updated through weekly sprint reviews.

Can you migrate my store to Shopify from another platform?

Yes. We handle end-to-end migrations from Magento, BigCommerce, WooCommerce, Squarespace, Wix, Shopware, and other platforms. Every migration includes full data transfer, SEO preservation with URL mapping and 301 redirects, theme development, integration setup, and post-launch support. Visit our Shopify migrations page for more detail.

Is Udundi a Certified Shopify Plus Partner?

Yes. Udundi is a Certified Shopify Plus Partner with over a decade of platform experience, 10+ verified skills, and a 5-star partner rating. This gives our clients access to partner-level support channels, early access to platform features, and the confidence that comes from working with a vetted agency. See our Shopify Plus services for enterprise-specific offerings.

Do you offer ongoing Shopify support and maintenance?

Absolutely. Most of our clients work with us on a monthly retainer model. Support retainers cover bug fixes, troubleshooting, app management, performance monitoring, platform updates, and strategic guidance—all handled by the same senior team that built your store. Hours are flexible and can be redirected across services each month. Learn more on our support services page.

What makes Udundi different from other Shopify development agencies?

Three things. First, we are 100% in-house—every person on your project is a full-time senior employee, not a contractor or offshore resource. Second, we have been building on Shopify since 2012—before Shopify Plus existed—so our depth of platform knowledge is not something you can replicate with a team that started last year. Third, we are conversion-obsessed. We do not just build stores that look great; we engineer them to sell. Our track record—250+ themes, 180+ apps, 450+ stores optimized for search, and a 98% client satisfaction rate—speaks for itself.

Can you build a custom Shopify app for my store?

Yes. We build custom private apps for individual stores and public apps for the Shopify App Store. Common projects include API integrations with ERPs and 3PLs, data sync between Shopify and external systems, custom product configurators, advanced checkout functions, and fulfillment logic. With 180+ apps shipped, we have seen and solved most custom development challenges on the platform. See our app development page for details.

See what we have built for our clients

Doughy

Doughy is a vegan cookie dough brand with a vibrant visual identity. They came to us for a full website overhaul—including a Shopify migration from Wix, standout UX, and interactive custom features that brought their brand to life

Cozy Earth

Cozy Earth is a premium loungewear and bedding brand known for elevated comfort and sustainable materials. Since 2020, we have served as their full-service digital partner, guiding the brand through a period of explosive growth. What began as an urgent website rescue and relaunch evolved into a long-term partnership spanning Shopify development, CRO, UX/UI design, custom applications, mobile app development, and omni-channel marketing support.

Glow Luxury

Glow Luxury is a fast-growing luxury bag reseller with a highly engaged community. From the very beginning, we’ve partnered with their team to build the brand, from visual identity to a fully custom Shopify site tailored to their unique business model and evolving customer needs. With their loyal customer base, we’ve helped strategize new and unique ways to drive retention by leveraging Klaviyo.

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Whether you're launching, migrating, or optimizing, our team delivers creative, conversion-focused solutions tailored to your brand.