OpenCart Development
Development and care of OpenCart online stores — lean, licence-free and with custom modules. With Buntweb Filter I develop and sell my own commercial OpenCart module.
OpenCart — the lean open-source shop with zero licence costs
OpenCart is a lean open-source e-commerce platform: no licence costs, modest server requirements and a clear backend where merchants manage their products themselves. For small and medium businesses this is often the most economical route to their own online store — the software costs nothing, you only pay for the implementation.
When OpenCart is the right choice
Compared to WooCommerce, OpenCart scores as a pure shop system: built for selling from the ground up, without the WordPress substructure and its plugin overhead — which keeps the store fast and easy to oversee. Compared to Magento, OpenCart is far lighter: no enterprise overhead, no expensive infrastructure, no agency dependency. If you run a focused shop with a manageable catalogue and do not need a large CMS around it, OpenCart is often the best fit.
Custom modules — without core hacks
OpenCart is extended through custom modules and OCMOD extensions, without touching the core. That keeps the store updatable instead of breaking with every new version. My own commercial module proves this approach works in practice: Buntweb Filter, an AJAX product filter for OpenCart that is sold as a finished product and continuously maintained. The same care goes into every client module — clean code, clear structure, documented installation.
Migration and upgrade to OpenCart 4
OpenCart 4 has arrived, but the extension ecosystem is still catching up. Whether the upgrade already pays off for your store depends on your modules and your theme. I check compatibility, plan the upgrade path from 3.x to 4.x and carry out the migration in a controlled way — including data, extensions and design. You can find an honest assessment of the current state in the blog post on OpenCart 4.
Performance & SEO for the store
A fast store sells better — and ranks better. I optimise load times, caching and images and take care of shop SEO: clean URLs, correct meta data, structured data for products and a category structure Google understands.
Scope of services
OpenCart stores
Building new online stores and customising existing installations on OpenCart 3.x and 4.x.
Custom modules & OCMOD extensions
Development of custom modules and OCMOD extensions — updatable, without touching the core.
Themes & design
Customisation of existing themes or implementation of an individual design for your store.
Performance & SEO
Optimising load time, caching and shop SEO — from clean URLs to structured data.
Migration & care
Upgrade from OpenCart 3.x to 4.x plus ongoing care and development of existing stores.
What OpenCart projects include
| Service | Included |
|---|---|
| Shop build & setup | ✓ |
| Custom modules & OCMOD | ✓ |
| Theme customisation | ✓ |
| Buntweb Filter integration | ✓ |
| Performance optimisation | ✓ |
| Migration 3.x → 4.x | ✓ |
| Ongoing care | ✓ |
How an OpenCart project runs
Clarify catalogue, features and existing extensions.
Define modules, theme and, if needed, the migration path.
Development with regular check-ins.
Go-live, onboarding and optional ongoing care.
Frequently asked questions about OpenCart development
Is OpenCart suitable for a small shop in Austria or Germany?
Yes, very much so. OpenCart is lean, has no licence fees and runs on affordable hosting. Tax rates, payment methods and languages can be set up cleanly for the AT/DE market — ideal for small and medium retailers.
OpenCart or WooCommerce — which is better?
It depends on the project. If you already use WordPress or plan a lot of content around the shop, WooCommerce is often the better fit. If you want a pure, fast shop system without a CMS substructure, OpenCart. I work with both and advise honestly.
Can you extend an existing store with third-party modules?
Yes. I analyse the installation, check for OCMOD conflicts between existing extensions and build on top of it cleanly — without breaking modules that work.
What about OpenCart 4 — should I migrate?
Not automatically. OpenCart 4 is stable, but many extensions have not been ported yet. I check whether your modules and theme are ready and recommend the switch only when it actually pays off for your store.
Do you build OpenCart modules on request?
Yes — that is a core area. With Buntweb Filter I develop and sell my own commercial OpenCart module; client modules are built to the same standard: as OCMOD extensions, updatable and without core hacks.
OpenCart development from Vienna — shops, modules & migration
Looking for an experienced OpenCart developer in the DACH region? As a sole proprietor in Vienna I offer OpenCart development without the overhead of a large OpenCart agency: direct contact, honest assessments and pricing that works for small and medium retailers. From building a new online shop with OpenCart through theme customisation to performance and SEO optimisation of existing stores, I cover the full lifecycle.
If you want to have an OpenCart module developed, you benefit from experience in real product development: with Buntweb Filter I sell my own AJAX product filter for OpenCart — a module that runs in real shops and is continuously maintained. Client modules are built to the same standard: as OCMOD extensions without core hacks, so your store stays stable through every update.
I also support your OpenCart migration: from a controlled upgrade from OpenCart 3.x to 4.x — read when it pays off in the blog post on OpenCart 4 — to moving to new hosting. And to keep the store secure and up to date afterwards, I optionally take over ongoing care and maintenance: updates, backups, monitoring and small improvements from a single source. That way your OpenCart store stays fast, secure and ready for the next version.