Custom DevelopmentMagentoShopify PlusIntegrationsMigrationsFrontendAPIHeadlessCustom DevelopmentMagentoShopify PlusIntegrationsMigrationsFrontendAPIHeadless
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Ecommerce Development
Expert ecommerce developers building custom online stores, platform migrations and enterprise integrations for Australian brands.
Every ecommerce business has unique requirements that off-the-shelf themes and plug-and-play solutions cannot address. As a specialist ecommerce development agency, we build custom stores from the ground up on Shopify Plus, Magento and headless architectures, giving you a platform that is engineered around how your business actually operates.
As Sydney based ecommerce developers, we work with brands at every stage of growth. From launching your first online store to migrating a complex catalogue between platforms, we handle the technical heavy lifting while keeping your business running. Our builds are custom from the ground up, using each platform's native tools, headless architecture with Next.js or Hydrogen, and deep API integrations that connect your store to the tools you already use.
We specialise in the areas that drive real business outcomes: custom extension development, third-party system integrations, platform migrations, frontend performance and mobile-first design. Whether you need to connect your store to an ERP, build a custom checkout flow or migrate from Magento 1 to Shopify Plus, we have the experience and process to deliver on time and on budget.
Whether you are a DTC brand scaling fast or an established retailer moving online, we build ecommerce stores that look exceptional, load fast and convert. Every project includes mobile-first design, SEO best practices and a platform you can manage without calling a developer for every change.
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ClientsCustom Development
When your business requirements go beyond what off-the-shelf solutions can deliver, custom development bridges the gap. We build bespoke extensions, modules and platform-specific functionality on Magento and Shopify Plus that solve your exact operational challenges, from complex shipping logic to custom pricing rules and unique product configurators.
Every custom build follows platform best practices so your store remains stable, upgradeable and maintainable. We never modify core files, always extending through clean, modular code that can be updated or removed without impacting your store's stability.
Platform Migrations
Migrating between ecommerce platforms is one of the most complex projects a business can undertake. We handle full migrations between Magento, Shopify Plus, WooCommerce and BigCommerce, including product and customer data, order history, URL redirects for SEO preservation and integration reconfiguration.
Our migration process is built on years of experience moving stores between platforms. We use automated scripts for data transfer, run parallel environments during transition and coordinate DNS cutover to ensure zero downtime. Your customers never notice the switch.
Third Party Integrations
Your ecommerce store is one part of a larger tech stack. We connect your platform to ERP systems, POS, warehouse management, CRM and marketing platforms so data flows automatically between every system. No manual exports, no CSV uploads, no double-handling.
Whether you need real-time inventory sync with NetSuite, automated order routing to a 3PL, or customer data flowing into Klaviyo and HubSpot, we build integrations using platform APIs, webhooks and middleware that keep your entire operation in lockstep.
Frontend & Performance
The frontend of your store is what customers see and interact with. We build mobile-first, accessible themes and storefronts that are optimised for speed across every device. From custom Shopify Liquid themes to headless React frontends, every pixel is crafted to convert.
Performance is not an afterthought. We optimise Core Web Vitals, reduce JavaScript payloads and implement lazy loading, image optimisation and caching strategies that deliver sub-second page loads. Faster stores rank higher, convert better and keep customers coming back.
We don't build template stores. We build platforms for growth that are engineered to scale, designed to convert and built to last.
How We Work
From first call to launch day, every development project follows a proven process built on transparency, precision and zero surprises.
01
Discovery & Scoping
We audit your current platform, map your tech stack and define the build scope. You walk away with a clear roadmap, timeline and fixed quote before a single line of code is written.
02
Specification & Wireframes
Detailed specifications and high-fidelity wireframes are created in Figma and reviewed with your team. We prototype key user flows so you can see exactly how the store will work before development begins.
03
Development & Integration
Custom theme development, backend extensions, API integrations and third-party connections happen in parallel. Weekly demos keep you in the loop without slowing the team down.
04
Testing & QA
Cross-browser testing, performance audits, accessibility checks and load testing across devices. We break things in staging so nothing breaks in production.
05
Launch & Ongoing Support
DNS cutover, go-live monitoring and 30 days of post-launch support included. From here we move into ongoing maintenance, performance optimisation and feature development as your store grows.
Frequently Asked Questions
Common questions about ecommerce development, timelines, pricing and ongoing support.
A custom ecommerce build typically starts from $20,000 for a standard store and scales based on platform choice, integrations, design complexity and headless architecture. We provide a fixed-price quote after a free discovery session so there are no surprises.
Most custom ecommerce builds take 8 to 16 weeks from kickoff to launch. Simpler theme builds can be faster, while complex migrations with multiple integrations, custom extensions or headless architecture may take 16 to 24 weeks.
We specialise in Shopify Plus, Magento (Adobe Commerce), and headless commerce architectures using frameworks like Next.js and Hydrogen. We recommend the right platform based on your business requirements, catalogue size and growth plans.
Yes. We handle full migrations between Magento, Shopify, WooCommerce, BigCommerce and other platforms. This includes product and customer data, order history, URL redirects for SEO preservation and integration reconfiguration. Most migrations complete with zero downtime.
Yes. We offer monthly retainers covering performance monitoring, security updates, platform maintenance, conversion rate optimisation and new feature development. Launch is the starting line, not the finish.
Every project follows a five-stage process: discovery and scoping, specification and wireframes, development and integration, testing and QA, then launch and ongoing support. You receive a detailed specification and fixed-price quote before any code is written.
What we build
From custom storefronts to complex integrations, every development project we deliver is tailored to how your business actually operates.
- 01Custom Extension DevelopmentWe build bespoke extensions and modules on Magento and Shopify Plus that solve your exact business requirements. From complex shipping logic to custom pricing rules and unique product configurators, every extension follows platform best practices and is built to last.
- 02Third Party IntegrationsConnect your store to ERP, POS, 3PL, CRM and marketing platforms. We build robust API integrations using platform APIs, webhooks and middleware so data flows automatically between every system in your tech stack without manual intervention.
- 03Theming & Frontend DevelopmentWe build custom themes from scratch using Liquid, React and modern CSS. No cookie-cutter templates. Every design is crafted to match your brand identity and optimised for speed, accessibility and conversion across all devices.
- 04Quality Code & StandardsClean, modular code is the foundation of a maintainable store. We follow Magento and Shopify coding standards, never modify core files and build every extension so it can be updated or removed without impacting your store's stability.
- 05Wireframes & SpecificationThe foundation of every successful build is a detailed specification and wireframes. We use the latest UX and prototyping tools to create blueprints that ensure developers, designers and stakeholders are aligned before a single line of code is written.
- 06Store MigrationsMoving between platforms is complex. We handle full data migrations including products, customers, orders and URL redirects between Magento, Shopify, WooCommerce and BigCommerce so you launch on your new platform without losing search rankings or sales history.
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★★★★★
“Rival has achieved for us what other developers said was either too costly or simply not possible. All projects have been delivered on time and to budget.”
13 years in eCommerce