Shopify App Development Services

Shopify App Development.

When an off-the-shelf app can't do what your business needs, we build one that can. Custom apps for your own store, public apps for the Shopify App Store, and integrations that connect Shopify to the rest of your systems.

Trusted by brands in Fashion Accessories Electronics Gaming Finance Gifting

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Overview

Stop bending your
business around apps.

Most stores start with apps from the App Store, and that’s usually the right call. But as you grow, the gaps start to show. You end up paying for five apps that each do half a job, copying data between systems by hand, or telling customers you can’t offer something because no app supports it.

A custom Shopify app fills that gap properly. We build it around the way your business actually works, connect it to the tools you already use, and keep it fast, secure and within Shopify’s rules. Whether it’s a private app for your own store or a product you want to sell to other merchants, we take it from the first idea to launch.

Built on Shopify’s latest APIs and app extensions
Embedded in your Shopify admin, so it feels native
Clean, documented code that’s easy to build on

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What we offer

Our Shopify App
Development Services.

Custom Shopify Apps

Apps built only for your store, to automate the jobs your team does by hand, add features your theme can't, or handle rules that are unique to your business.

Public Apps for the App Store

Planning, building and launching apps for other merchants, including billing, onboarding and everything needed to pass Shopify's app review.

Checkout Extensions & Shopify Functions

Custom discounts, shipping and payment rules, and checkout UI extensions that work with Checkout Extensibility and keep your checkout fast.

Theme App Extensions

Bring your app's features to the storefront with app blocks and embeds that merchants can place in the theme editor, with no code edits needed.

API & System Integrations

Connect Shopify to your ERP, CRM, warehouse, POS or marketplaces with reliable syncs for products, stock, orders and customers.

App Maintenance & API Upgrades

Shopify releases a new API version every quarter. We keep your app up to date, fix bugs, monitor errors and add features as your needs grow. Explore Store Maintenance

Why ByteCode

Why choose us?

An app is only useful if it's reliable. It has to handle real orders, real traffic and Shopify's regular platform updates without breaking. We build apps the way Shopify recommends, test them properly and stay around to keep them running.

Shopify-First Architecture

We use Shopify's own app tooling, the Polaris design system and current APIs, so your app is fast, secure and ready for future API changes.

Product Thinking, Not Just Code

We question the brief, suggest simpler options and design the app around how people will actually use it.

Built With App Review in Mind

For public apps, we follow Shopify's app requirements from day one, so there are fewer surprises when you submit.

Support After Launch

We monitor errors, handle API version updates and keep improving the app once it's live.

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How we work

Our process.
Six steps to growth.

We build apps in small, visible steps, so you can see progress early, give feedback often and launch with confidence.

Step 1: Discovery & Scoping

Understand the problem the app needs to solve and who will use it.
Check whether an existing app or a simpler option could do the job.

Step 2: Technical Planning

Map out data, API access scopes, webhooks and integrations.
Agree on the features for the first release and a realistic timeline.

Step 3: UX & Interface Design

Design admin screens with Polaris, so the app feels at home in Shopify.
Plan storefront and checkout extensions where they're needed.

Step 4: Development

Build the app in short sprints, with a working demo at the end of each one.
Give you a test store so you can try new features as they're ready.

Step 5: Testing & Review

Test with real store data, edge cases and high order volumes.
Prepare the listing and submit public apps for Shopify's review.

Step 6: Launch & Support

Install the app on your store or publish it on the App Store.
Monitor errors, update API versions and plan the next set of features.

FAQ

Shopify App Development
questions, answered.

What kind of Shopify apps do you build?

We build custom private apps for your own store, as well as public apps for the Shopify App Store - for example custom pricing, bundles, B2B workflows, integrations and admin tools.

When do I need a custom app instead of an existing one?

When existing apps don't fit your process, add too much cost or slow your store down, or when you need something unique to your business. We'll tell you honestly if an existing app already does the job.

Can a custom app replace several apps I’m paying for?

Often, yes. Combining features into one lightweight custom app can reduce monthly app fees and remove scripts that slow your store.

Can you publish an app on the Shopify App Store?

Yes. We build to Shopify's app requirements and help you through the submission and review process.

Which technologies do you use for Shopify apps?

We work with the Shopify APIs, Shopify CLI, app extensions and Metafields, using Node.js and other modern frameworks, so your app follows Shopify's latest standards.

Still have a question? Talk to an expert

Let's work together

Let's build the app
your store is missing.

Tell us what you need the app to do and where things are getting stuck today. We'll suggest the simplest way to build it, with a clear scope, timeline and cost.

Book a free 30-min call See our work

Related case studies

Projects we've built and grown.

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MyHarry

Shopify + · Home Improvement

myHarry continues to benefit from a scalable Shopify ecommerce platform built for long-term growth.

+27%higher average order value

99.9%storefront uptime

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Maker & Moss

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Maker & Moss continues to benefit from a scalable, high-performing Shopify platform built for long-term ecommerce success.

-41%drop in bounce rate

+64%more organic traffic

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Printing Needle

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Printing Needle continues to benefit from a scalable Shopify ecommerce platform designed for long-term growth.

+52%growth in mobile revenue

3xfaster checkout experience

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Bestform

Shopify + · Consumer Healthcare

Bestform continues to benefit from a scalable ecommerce platform designed to support long-term business growth.

99.9%storefront uptime

+52%growth in mobile revenue

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EcoFlow

Shopify + · Consumer Products

Discover how we developed a high-performance Shopify website for EcoFlow, delivering an engaging shopping experience, optimized performance, and scalable ecommerce functionality.

3xfaster checkout experience

+38%increase in conversion rate after launch

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Digital Junkies

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A Bold-Thinking Digital Agency That Designs Marketing Ecosystems From Traffic to Conversion for Australian Businesses Who Want Real Results, Not Fluff.

99.9%storefront uptime

+52%growth in mobile revenue

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Jeecey

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Revitalizing Jeecey’s Online Fashion Platform With Bold Design, Intuitive Navigation, and Customized E-commerce Features for the Dutch Apparel Market.

1.6smobile page load time

+27%higher average order value