At Rusty Monkey, we’re an experienced BigCommerce development agency specialising in building, optimising and supporting ecommerce websites on both BigCommerce Catalyst and BigCommerce Stencil. If you’re looking for a trusted BigCommerce developer, our team combines technical expertise with a deep focus on UX and conversion rate optimisation (CRO) to help you grow your online sales.
UX & CRO First
We design ecommerce experiences that convert visitors into customers. Every page is crafted to improve engagement, increase sales and support long-term growth.
Custom Apps & Integrations
Need your store to talk to third-party software, ERP systems or marketing tools? We build custom BigCommerce apps and seamless integrations that make your business more efficient.
Data Migration Specialists
Switching from Shopify, Magento, WooCommerce or another platform? We provide secure, accurate data migration for products, customers and orders with no disruption to your business.
Future-Proof Ecommerce
Rusty Monkey builds scalable BigCommerce stores optimised for speed, SEO and growth designed to perform now and adapt to your future needs.
Catalyst is BigCommerce’s modern Next.js headless frontend, built to connect seamlessly to the BigCommerce backend via APIs. It gives you complete design freedom, lightning-fast performance, and flexibility to integrate with external systems.
Stencil is BigCommerce’s powerful theme framework. It’s stable, customisable and ideal for brands who want a robust, scalable storefront without going fully headless.
Rusty Monkey knows both inside-out so whether you want the control of Catalyst or the simplicity of Stencil, we can build the right solution for your business.
We’ve worked with ecommerce businesses across fashion, homewares and B2B industries to design, build and grow BigCommerce websites that deliver measurable results. Whether you need a full site build, custom development, or ongoing optimisation, Rusty Monkey is the BigCommerce agency you can rely on.
National outdoor clothing retailer Rohan needed their website migrating to the BigCommerce platform so that they could have more control over their content. With a tight deadline in place to ensure launch before an important sale event, our front end developers worked with their technical team to deliver a fresh new website with an easy-to-manage CMS and additional functionality.
DriveDen, a UK-based automotive accessories retailer, needed a faster, more flexible ecommerce site. Replatforming to BigCommerce Catalyst delivered a modern store with DVLA number plate lookup, a personalised ‘My Garage’ feature, and smoother checkout—giving their team more control while making it easier for customers to find the perfect fit for their vehicles.
Catalyst is BigCommerce’s Next.js headless frontend. It connects to the BigCommerce backend through APIs, giving brands complete flexibility over design, UX and integrations while keeping BigCommerce’s robust commerce engine.
Stencil is BigCommerce’s theme-based framework for creating storefronts. It’s a strong choice for brands who want a scalable, customisable site without the complexity of a headless build.
It depends on your needs. Catalyst is ideal for brands wanting total design control, advanced integrations and performance. Stencil works well for businesses who want a faster route to market with reliable, flexible theming. Rusty Monkey can advise on the right approach for your project.
Yes, we specialise in data migration from platforms such as Shopify, Magento and WooCommerce. We securely move your products, customer records and order history with minimal downtime.
Absolutely. We create custom apps and integrations that extend your store’s functionality, connect to third-party systems, and support your unique business processes.
Our focus on UX and CRO means we design and optimise every step of the customer journey. From product page layouts to checkout flow, we make it easier for your visitors to buy.
We’re more than developers, we’re ecommerce growth partners. With expertise in Catalyst, Stencil, CRO, integrations and data migration, Rusty Monkey helps your store perform better today and scale tomorrow.
"Rusty Monkey have been absolutely smashing the whole process and the site looks great. It's the most engaged I have seen an agency on a project - they're open and willing to work with us while completely owning the implementation. The merchant is also really happy which makes everyone's life easier."
Eoin O'Callaghan - Big Commerce
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