Shopify Development Services
Expert shopify development for growing brands.
- Fixed-price projects — no surprise billing
- Dedicated project manager from day one
- Launch in 4–8 weeks with full documentation
- 10+ years of Shopify & IT industry expertise
What's included
Everything in our Shopify Development engagement
Every deliverable is scoped upfront. No surprises, no hidden extras.
Public & Private Shopify Apps
Custom private apps for your store or full public apps listed on the Shopify App Store. Built to Shopify's App Design Guidelines and REST/GraphQL API standards.
Third-Party Integrations
API integrations with ERP, CRM, POS, accounting, fulfilment, and marketing platforms that have no native Shopify connector — built as lightweight embedded apps.
Shopify Functions & Extensions
Discount functions, payment customisations, delivery customisations, and checkout UI extensions only available via Shopify Functions — replacing legacy script editor.
Webhook & Event Processing
Reliable webhook ingestion with retry logic, idempotency, and dead-letter queues so no order, inventory change, or customer event is ever missed.
App Analytics & Monitoring
Usage dashboards, error alerting, API rate limit monitoring, and performance tracking so your app runs reliably at scale.
Merchant-Facing Admin UI
Polaris-based admin interfaces that feel native to Shopify — your merchants manage your app from within Shopify admin without leaving their workflow.
Our process
How we deliver your Shopify Development project
Free Consultation
30-minute call to understand your needs and goals. We ask the right questions so we can scope accurately and avoid scope creep later.
Proposal & Kickoff
Fixed-price proposal with timeline sent within 24 hours. Once approved, you meet your dedicated project manager and we begin.
Build & Review
Fortnightly milestone reviews keep you in the loop. Staging link for your feedback at every stage — no surprises at delivery.
Launch & Handoff
Go live when you're 100% ready. Full code, docs, and training handoff. Optional retainer to keep improving post-launch.
Proven results
Shopify Development that drives real growth
"Working with OneOnic was the best decision we made for our store. The results were immediate and the process was completely stress-free."
— CEO, E-commerce brand (200+ orders/day)How we compare
OneOnic vs generic agencies
| What matters | OneOnic | Generic Agency | Freelancer |
|---|---|---|---|
| Fixed-price project | Yes | No Hourly | No Scope creep |
| Shopify-certified team | Yes | Sometimes | No Varies |
| Post-launch support included | 30 days free | No Extra cost | No No guarantee |
| Industry research before design | Yes | No | No |
| You own all code & files | Full handoff | Usually | Usually |
| Avg. delivery time | 4–8 weeks | 3–6 months | Unpredictable |
Platforms & tools we work with every day
Reviews
What clients say about our Shopify Development
"The shopify development OneOnic delivered exceeded our expectations. On-time, on-budget, and the results were immediate."
"Our revenue jumped 40% in the first month after going live. OneOnic clearly knows what they're doing with Shopify."
"Professional, fast, and transparent throughout. They flagged issues before they became problems and delivered exactly what was scoped."
FAQ
Your Shopify Development questions answered
When do I need a custom Shopify app vs a third-party app?
When no existing app does exactly what you need, when existing apps have limitations that affect your business, when you need deep integration with internal systems, or when an app's recurring cost exceeds a one-time build. We help you evaluate the build vs buy decision.
Can you build an app that integrates with our ERP or warehouse system?
Yes — this is one of our most common app builds. We design a bidirectional sync between Shopify and your ERP/WMS using webhooks and scheduled jobs, with error handling and reconciliation built in.
How long does a custom Shopify app take to build?
Simple private apps (basic integrations) take 2–4 weeks. Complex public apps with full merchant UI, billing, and multiple features take 8–16 weeks. We scope precisely after understanding your requirements.
Do you build apps that replace the script editor after its removal?
Yes — we build Shopify Functions for discount logic, payment method filtering, and delivery customisation that replaces Script Editor functionality with the new supported approach.
Can you submit and maintain a public app on the Shopify App Store?
Yes — we handle app review submission, listing optimisation, billing integration via Shopify's app billing API, and ongoing maintenance to keep the app compliant with evolving Shopify platform requirements.
Shopify Development done right — let's talk
Free consultation. Fixed price. Delivered on time. Get your quote in 24 hours.