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Ecommerce Software Development

Ecommerce Software Development for Online Stores Built Around Faster Checkouts

DeveloperLook is an ecommerce software development company for online stores: we build the storefront, checkout, and custom apps, then connect them to your inventory, ERP, 3PL, and accounting.

  • 90+

    Mobile speed score target

  • 100%

    Store code and data you own

Let's Discuss

Teams we have built for:

  • Shopify
  • WooCommerce
  • BigCommerce
  • Magento
  • Stripe
  • PayPal
  • Klarna
  • Amazon
  • TikTok Shop
  • QuickBooks

The Problem

Your Store Grew App by App, and Now the Numbers Disagree

Most stores add tools as they grow: a subscription app, a returns app, a marketplace connector, an accounting sync. Each one solves a single job and keeps its own copy of your orders and stock.

  1. 01 · Overselling

    Two channels sell the same last unit before anyone notices.

    One stock count feeds every channel, with a buffer that blocks the double sale.

  2. 02 · Spreadsheet uploads

    Your 3PL only sees orders after someone uploads a spreadsheet.

    Paid orders reach your 3PL or warehouse system on their own, with tracking sent back.

  3. 03 · Inbox returns

    Returns arrive as photos and complaints in the support inbox.

    A returns portal lets customers choose an exchange, credit, or refund and print a label.

  4. 04 · Books mismatch

    QuickBooks revenue doesn't match what Shopify reports for the month.

    Orders, fees, refunds, and tax post to QuickBooks or Xero as clean entries.

It's Monday, and Amazon sold the jacket your Shopify store already sold on Saturday. Your 3PL sees weekend orders only after someone uploads a spreadsheet. A customer emails twice to ask where their parcel is, because the tracking page shows nothing new. Returns arrive as photos in the support inbox. At month end, QuickBooks reports a revenue figure Shopify doesn't match, and you still pay for apps nobody remembers installing.

We start with a free store review that follows one order from the product page to the warehouse, the books, and a return. Then we fix the weakest link first. That could mean one stock count for every channel, orders sent to your 3PL once paid, refunds posted to QuickBooks, or a returns portal. Everything runs through your platform's own APIs, in accounts you own. Your team stops exporting spreadsheets, and you stop paying for apps that do the same job.

  • One stock count everywhere

    Shopify, Amazon, eBay, and TikTok Shop sell from the same number, with a buffer for each channel.

  • Built in your accounts

    Apps, code, and store data stay in accounts you own, so you can change teams without a rebuild.

  • Tested with real orders

    We run test orders, refunds, and returns on a preview store before anything reaches your live checkout.

Our Services

Ecommerce Application Development Services, From Storefront to Warehouse

Pick the group that matches what's costing you sales or hours right now. Each service has its own page with starting prices, and one team handles the hand-offs between them.

Store Builds & Headless

01 / 08

New stores, custom Shopify themes and apps, headless Hydrogen builds, and marketplaces with vendor payouts, on the platform that fits your catalog.

Need something else? Talk to us

Who We Build For

Online Store Development Services Matched to How You Sell

A subscription brand needs dunning and churn reports, while a multichannel seller needs one stock count. Choose the store that sounds like yours to see the services we combine and the usual timeline.

The stack we usually build

4 services, one project plan

All services

  1. Store build

    Shopify Development Services

    Theme in your brand, products imported, and payments, tax, and shipping set.

  2. Express checkout

    Digital Wallet & Express Checkout Integration

    Shop Pay, Apple Pay, and PayPal buttons tested on real phones.

  3. Email flows

    Klaviyo Expert Flow Setup

    Welcome, browse, and checkout flows built on your store data.

  4. Tracking

    GA4 Setup and Audit Services

    Purchase events checked against real orders before ads start.

Open with checkout, email, and tracking already working

You have products, photos, and a launch date, but no store yet. You want checkout, email, and tracking running before the first ad goes out, not patched in afterward.

New brands launching their first store: You're launching a skincare line in 6 weeks and need checkout, email flows, and tracking working before your first paid ad goes live.

  • A Shopify store in your brand
  • Welcome and cart emails live at launch
  • Sales tracked in GA4 from the first order
Plan this setupTypical timeline: 4 to 6 weeks

Our Process

From Free Store Review to Live Orders in Five Steps

You see the scope and price before we start, review every change on a preview link, and watch test orders reach your warehouse and books before launch.

  1. We trace one order from your product page to the warehouse, the books, and a return. You get a short written list of where orders stall, which apps overlap, and what to fix first.

Projects We've Built

Ecommerce Stores and Shopping Apps We Have Built

Furniture, fashion, and hardware stores we designed and built, from storefronts with admin dashboards to a fashion shopping app.

View All Projects

What Our Clients Say

What Clients Say After Launch

Feedback from store owners after we fixed their checkout and catalog browsing.

We were getting plenty of traffic, but far too many people were leaving at checkout. The buying process had simply become too complicated. The team took the time to understand where customers were dropping off, then rebuilt the checkout flow and cleaned up the shopping experience. What I really appreciated was that they didn’t just make the store look better, they actually solved the problems that were costing us sales. The whole store feels faster, simpler, and much easier to buy from now. Exactly what we needed.

Rowan WhitakerFounder, Home & Lifestyle Brand01 / 03

  • 1,000+

    Projects shipped

  • 10+

    Years of experience

  • Top 3%

    Upwork Top Rated Plus

  • 5 stars

    Average review score

Overview

What do ecommerce software development services include?

DeveloperLook provides ecommerce software development for Shopify, WooCommerce, and BigCommerce stores. We build storefronts and custom apps, then connect checkout, inventory, ERP, 3PL, returns, and email so orders move without retyping. Single audits and setups start at $299, connected store builds launch in 5 to 7 weeks, and you own every account and line of code.

DEVELOPERLOOK

Project facts · Ecommerce Software Development for Online Stores

Service
Ecommerce software development for online stores (builds, checkout, syncs, returns)
Typical timeline
1 to 4 weeks for setups, 5 to 14 weeks for store builds
Platforms
Shopify, Shopify Plus, WooCommerce, BigCommerce, and Magento
Built with
Liquid, Shopify Functions, Hydrogen, Next.js, Node.js, and platform APIs
Experience
10+ years of development experience and 1,000+ shipped projects
Post-launch support
30, 60, or 90 days, depending on plan
Communication
Calls in US, UK, and AU business hours
Starting price
From $299 USD, fixed scope after a free store review

Reviewed 6 Oct 2026 by Saimul Islam

Not a fit

  • Budget under $299

    Your budget is under $299 and you only need a small theme tweak. Shopify's theme editor or your theme developer's support desk is the cheaper route.

  • No products tested yet

    You haven't picked products or tested demand yet. A starter Shopify theme and a few small ad tests will teach you more than custom software.

  • Replacing your ERP

    You want custom software to replace NetSuite or another ERP. We connect your store to the ERP you already run instead, through our Shopify ERP Integration service.

  • Search traffic only

    You only want more organic traffic, with no build or integration work. Our Ecommerce SEO Services program handles that monthly, after a free audit.

Not sure we're the right fit?

Send a two-line brief. We'll tell you honestly whether we're the right team.

Ask on WhatsApp

Pricing

Transparent Starting Prices for Ecommerce Store Development Services

These are starting points in USD. Your final price depends on catalog size, your platform, and the systems we connect, and you get a fixed proposal after a free store review.

$2k$4k$6k$8k$10k$299$3,800$7,900

For stores fixing one thing first, from an ecommerce SEO audit at $299 to a Klarna setup at $450.

$299one-time, USD

Book a strategy call
  • One audit, setup, or fix from the services above
  • Free review before you get a quote
  • Fixed scope and price in writing
  • Changes tested before they go live
  • Apps and accounts kept in your name
  • 30 days of post-launch support

Recommended

For brands launching or moving a store that need email, tracking, and one sync live in 5 to 7 weeks.

$3,800one-time, USD

Get a custom quote
  • Shopify or WooCommerce store in your brand
  • Products, customers, and orders moved
  • Speed tuned to a 90+ mobile target
  • Klaviyo welcome, cart, and post-purchase flows
  • One inventory, 3PL, or accounting sync
  • 60 days of post-launch support

For Shopify Plus, B2B, or multichannel brands that need the ERP, 3PL, marketplaces, and returns tied together.

$7,900one-time, USD

Talk to our team
  • Everything in Connected Store Build
  • ERP, NetSuite, or 3PL sync for stock and orders
  • Amazon or one more marketplace on shared stock
  • Returns portal with exchange and refund rules
  • B2B price lists or Shopify Plus checkout rules
  • 90 days of post-launch support

More Industries

Other Industries We Build For

Store, booking, and payment software we build for other industries, from professional services to travel.

FAQ

Frequently Asked Questions

Straight answers on cost, timelines, platforms, and who owns the store after launch.

  • Our ecommerce work starts at $299 for an ecommerce SEO audit and $3,800 for a connected store build with email, tracking, and one sync. Single setups such as a Klarna integration ($450) or a Shopify speed fix ($650) sit in between. Connected platforms that add an ERP, a marketplace, and a returns portal start at $7,900, and every price is fixed after a free store review.

  • An ecommerce website costs from $1,100 for a Shopify store launch to $8,500 for a commerce platform with B2B pricing and ERP links. A Shopify brand store with custom sections and migrated data starts at $3,600, and WooCommerce stores start at $1,350. Catalog size, custom features, and the number of systems you connect move the price most.

  • An ecommerce app costs from $1,499 for one custom Shopify feature to $7,499 for a private app with Shopify Functions and checkout extensions. Our ecommerce app development services cover custom apps, discount rules, and theme features for your store. A native iOS and Android shopping app is a separate build, which our Mobile App Development service prices from $1,300 for a tested prototype.

  • Most ecommerce store builds take 5 to 14 weeks, while single setups take 1 to 4 weeks. A new Shopify or WooCommerce store with email flows, tracking, and one sync launches in 5 to 7 weeks. Adding an ERP, a marketplace, and a returns portal stretches that to 10 to 14 weeks. Product data is often the slowest part, so we ask for your catalog export in week one.

  • Ecommerce software is the set of programs a business uses to sell online: the platform that runs the store plus the apps around it. Shopify, WooCommerce, BigCommerce, and Adobe Commerce handle the catalog, cart, and checkout. Around them sit payment gateways, inventory and order systems, email tools such as Klaviyo, and accounting syncs. Most stores rent the platform and build only the parts that set them apart.

  • Ecommerce solutions are the platforms, integrations, and services a business combines to sell online, from a hosted store to a full custom build. When an ecommerce solutions company resells one platform, its advice tends to lead back to that platform. We work across Shopify, WooCommerce, and BigCommerce, so our recommendation starts from your catalog and back office instead of a product we resell.

  • Building an ecommerce website from scratch starts with the catalog, not the homepage. We map your products, variants, prices, and stock rules, then choose a platform that handles them without workarounds. Templates, checkout, payments, tax, and shipping come next, followed by product import and test orders. We write custom code only where an existing app can't do the job well.

  • To build an online store, pick a hosted platform such as Shopify, add your products and policies, and connect payments, shipping, and tax. A theme in your brand, a custom domain, and a few test orders finish the basics. Our online store development services add what a template leaves out: email flows, tracking that matches your orders, and one sync to your stock or books.

  • Building an ecommerce platform starts with deciding who sells on it. A marketplace for many sellers needs vendor accounts, commission rules, and split payouts. We launch a marketplace MVP on WooCommerce or Shopify in 3 to 5 weeks. Your own commission logic, Stripe Connect payouts, or peer-to-peer trading need custom code, which takes up to 16 weeks. Software that other merchants subscribe to is a SaaS build instead.

  • You own everything we build: the code, the theme, the private apps, and every platform account. We work through staff logins you remove at handover, and app subscriptions bill to your card, not ours. Each plan includes 30, 60, or 90 days of post-launch support, plus handover notes so any developer can pick up the work later.

Saimul IslamFounder & CEO, DeveloperLook

Still have questions?

Send a message or book a call with the team.

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