Shopify Apps
Shopify App Development and Commerce Engineering
We build Shopify apps, checkout extensions, and commerce automations that hold up under real order volume, from private merchant tools to public App Store products.
What you walk away with
- An app that survives real order volume
- Idempotent webhooks that never corrupt data
- A clear path through App Store review
- Shopify connected to your wider stack
Overview
Shopify runs a large share of the worlds online stores, and the platform is deliberately extensible. The opportunity is real, but Shopify app development has its own rules: the OAuth and scopes model, the GraphQL Admin API, webhooks that must be verified and idempotent, checkout extensions that run in a sandboxed environment, and billing through the Shopify API. A build that ignores those rules works in a demo and fails in production.
Dude Lemon builds Shopify apps as production software. We design the authentication and webhook handling first, make every webhook idempotent so retries do not corrupt data, and treat each merchant as an isolated tenant. Whether you need a private app that automates your own store operations or a public app for the Shopify App Store, the engineering discipline is the same.
Our commerce work spans storefront customization, subscription and recurring billing flows, checkout extensions, inventory and order automations, and AI features such as personalization and support. We connect Shopify to the rest of your stack, including ERPs, payment providers, marketing tools, and custom dashboards, so your operations run as one system rather than a pile of disconnected apps.
If you are a merchant trying to remove manual work, or a company building a product for other merchants, we handle the full build and leave you with clean, documented, ownable code.
On Shopify, idempotent webhooks and correct scope handling are not optional polish. They are the difference between an app that survives real order volume and one that quietly corrupts data.
Capabilities
What we build on Shopify
Multi-tenant apps with OAuth, billing, and a merchant dashboard, built and prepared for App Store review.
Internal tools that automate operations for a single store or a small group of stores you control.
Custom logic and UI at checkout, built within Shopify constraints to add upsells, fields, and validation.
Recurring billing, subscription management, and dunning flows wired into the Shopify and payment APIs.
Theme and storefront work that improves conversion without sacrificing performance or maintainability.
Order, inventory, and fulfillment automations that connect Shopify to your ERP, marketing, and data tools.
Why Dude Lemon
Why teams choose us for Shopify development
Shopify rewards apps that respect its rules and punishes ones that do not. We build the auth, scopes, and idempotent webhooks correctly the first time, so your app survives real order volume and passes review without a scramble. The same backend engineers who build our SaaS products write your Shopify code.
We also connect Shopify to the rest of your operation. An app that automates one task is useful, but a system that keeps Shopify, your ERP, and your marketing tools in agreement is transformative. We build for that bigger picture, not just the single feature in front of us.
Building for real order volume, not the demo
A Shopify app that works in a test store and an app that survives Black Friday are two different pieces of software. The difference is almost always in how the app handles webhooks, API rate limits, and concurrency. Shopify retries webhooks, sends them out of order, and occasionally sends them twice, and a naive handler will double-process orders or corrupt inventory when that happens.
We build every webhook to be idempotent, so a repeated event produces the same result and never double-counts. We respect API rate limits with proper backoff, and we design for concurrent purchases rather than assuming requests arrive one at a time. This is unglamorous engineering, but it is exactly what keeps a commerce app trustworthy when traffic spikes, and it is the part that most quick builds skip.
How we work
A clear path from idea to production
We define the app or automation, confirm what the Shopify APIs allow, and produce a technical plan with a clear path to App Store review where relevant.
We build OAuth, scope handling, and verified idempotent webhooks first, because this layer protects data integrity for everything that follows.
We build the core features and merchant interface in stages, testing each against a real Shopify development store.
We wire in billing, add rate limiting and error handling for API limits, and prepare for review or production rollout.
We support launch, resolve anything review surfaces, and offer ongoing feature work and monitoring on a retainer.
Engagement and pricing
Custom pricing, based on project scope
Every project is scoped individually. After a short discovery call you receive a clear written estimate, with no obligation. The engagement types below show how we usually structure the work.
A focused tool that removes manual work for your own store.
- OAuth and verified webhooks
- One core automation or feature
- Documentation and handoff
A multi-tenant App Store product with billing and dashboard.
- Multi-tenant architecture
- Billing and merchant dashboard
- Checkout or storefront features
- Review preparation
Ongoing engineering for a commerce product or operation.
- Dedicated engineering time
- Roadmap delivery
- Scaling and support SLA
Shopify App Development FAQ
Frequently asked questions
Do you build both public and private Shopify apps?
Yes. We build private and custom apps that automate operations for stores you control, and public multi-tenant apps prepared for the Shopify App Store with OAuth, billing, and a merchant dashboard. The right choice depends on whether you are serving your own store or selling to other merchants.
Can you build checkout extensions?
Yes. We build checkout UI and logic within Shopify constraints, including custom fields, validation, and upsell flows. Because checkout runs in a sandboxed environment, we design within those limits from the start rather than discovering them late.
Can you add subscriptions and recurring billing?
Yes. We build subscription management and recurring billing wired into the Shopify and payment APIs, including trials, upgrades, and dunning for failed payments. We make the billing flows idempotent so retries do not double-charge or corrupt records.
Can you connect Shopify to my other systems?
Yes. We integrate Shopify with ERPs, payment providers, marketing platforms, data warehouses, and custom dashboards. Our backend and API engineering experience means these connections are reliable, not brittle scripts.
Will my app pass Shopify App Store review?
We build against Shopify requirements from the start and prepare for review before submission, so it is predictable. If review surfaces an issue, we resolve it as part of the launch.
How long does a Shopify app take to build?
A focused automation or private app is often three to six weeks. A public App Store product with billing and a dashboard runs longer and ships in stages. We provide a realistic timeline after scoping.