Shopify Development Agency for Apps, Themes & AI Commerce
HelloDevs is a Shopify development team. We build custom apps, themes and headless storefronts, connect Shopify to the systems around it, and add AI where it earns its place — and we publish and maintain Shopify apps of our own.
Why brands choose HelloDevs
We blend creativity, code, and cutting-edge tech to turn your ideas into powerful products.
Number of Apps
Client's Satisfaction
Number of Projects
Shopify apps we build and run
Anyone can describe a process. HelloDevs would rather hand you working software - one app live today, four more close behind, all built and maintained by the same team that would work on your project.
Shopify development services
HelloDevs is a Shopify development team first — themes, apps, integrations, headless storefronts and AI, built to keep working long after launch — with SaaS products, mobile apps and web development for the work around the store.
Shopify case studies: what we built and what changed
Screenshots are easy. Numbers are harder, so here is what we built, what broke, and what changed afterwards.
A quiz that recommends the right product — and then proves it worked. When an order is paid, one webhook attributes it back to the answer that earned it, closes the abandoned cart, marks the discount redeemed and stops the follow-up sequence, so nobody is chased to buy what they just bought.
Shopfly
Popups, smart bars and social proof feeding one segmented subscriber list, with campaigns and automations sent from the same place. Klaviyo and Mailchimp stay in sync rather than competing, and scheduled sends are locked so a campaign can never go out twice.
AI drafts your FAQ answers from your own product data; you edit them and publish. The structured data goes with them — valid FAQPage markup generated on publish, so crawlers and AI answer engines can read exactly which questions the page answers.
Buy a section once and we write the Liquid straight into your theme. From then it behaves like any other section — configured in the theme editor, no third-party runtime on the page, and still working if you uninstall us.
One widget builder for the whole storefront — social icons, chat, WhatsApp, sticky bars. The configuration ships inside the page through a shop metafield, so widgets are there on first paint instead of a network request later. Two read-only permissions, no customer data. Live on the Shopify App Store.
What every Shopify app project includes
What you get with every HelloDevs app quote
Every HelloDevs app quote covers all of this. If an agency leaves any of it out, the cost reappears later as a change request.
- Scoping documentWhat gets built, what does not, agreed before any code is written. We define scope, timeline, and deliverables together so there are no surprises mid-project.
- The app itselfEmbedded in Shopify admin, built to Shopify's current standards and best practices. Performance-optimized, fully responsive, and designed to feel native to the merchant experience.
- Billing setupShopify Billing API wired up with plans and trials configured from day one. Recurring charges, usage billing, and free trial flows are all handled and tested before launch.
- App Store submissionWe handle the review process, the rejections, and every resubmission. You stay focused on your business while we navigate Shopify's requirements until you're approved.
- Listing assetsScreenshots, description, and keywords written for App Store search visibility. We craft listing copy that communicates your value proposition and helps merchants find you.
- DocumentationSo you are not dependent on us to understand your own product. Clear, structured docs covering setup, configuration, and troubleshooting for your team and future developers.
- Source codeYours, in your repository, from day one — no lock-in, no gatekeeping. Full Git history, clean architecture, and code you can confidently hand off to any developer.
- 30 days of post-launch fixesIncluded in every project, not billed as an extra. Any bugs, edge cases, or issues that surface after launch are fixed promptly at no additional cost.
What clients say about HelloDevs
"HelloDevs delivered exactly what we needed—fast, polished, and without unnecessary complexity. From the first design review to launch, communication was clear and every milestone was met on time."
Sarah Mitchell
Founder, BrightFlow
"The team transformed our idea into a production-ready SaaS platform with impressive speed. The interface feels premium, performance is excellent, and our customers noticed the improvement immediately."
Emily Rodriguez
Marketing Director, ScalePilot
Number of Apps
Client's Satisfaction
Number of Projects
Shopify development agency FAQs
- A Shopify development agency builds and maintains the parts of a store Shopify does not give you out of the box. That means custom themes, apps, integrations with your other systems, and ongoing fixes. HelloDevs does all of this and also publishes its own Shopify apps.
- Yes. We work with merchants across North America, Europe, and Asia. Our process is async-first with scheduled overlap hours, so time zones have never been a blocker for a project.
- It depends on scope. Theme customisations typically start in the low four figures; custom apps and full builds range higher. After a free audit we give you a fixed quote — no hourly surprises.
- Yes. A custom app is built for one store and installed directly, with no App Store listing. Shopify retired the old “private app” type, so custom apps are what we build for single-store workflows, integrations and back-office tools.
- Every project ships with a support window, and most clients stay on a maintenance retainer: monitoring, Shopify update compatibility, and a direct line to the same developers who built it.
- Usually not first. A well-built Online Store 2.0 theme is fast enough for most stores and keeps the theme editor your team relies on. Headless earns its cost when content, several frontends or a genuinely unusual experience outgrow a theme — the honest comparison, and what a headless build involves.
- Continuity and coverage. An agency gives you review processes, backup when someone is unavailable, and accumulated platform experience across many stores — with one point of accountability.
Didn't get your answer?
If you still have questions or need further assistance, feel free to reach out to our team. We're here to help you every step of the way.
Start a Shopify project
Let's Connect!
Tell us your requirements and get a professional developer response.
