PHP 
Hooks 
REST API 
Gutenberg 
Custom WordPress Plugin Development
Custom WordPress plugin development for business logic, workflows and features unique to your site.
Custom WordPress Plugins
Custom WordPress plugins that do exactly what your business needs, securely, quickly and without breaking on the next update.
Introduction
EIT Connect offers WordPress plugin development for features that off-the-shelf plugins can't do well, or can't do safely. Every WordPress plugin developer on our team follows the official WordPress coding and security standards, builds with hooks rather than editing other plugins' code, and documents what they ship. The result is functionality that fits your workflow exactly, survives WordPress and WooCommerce updates, and can be maintained by any competent developer in future.
What We Offer
From a single feature to a full plugin product.
Custom WordPress plugin development for business logic, workflows and features unique to your site.
Pricing rules, checkout steps, shipping, inventory and B2B features, compatible with modern WooCommerce. See WooCommerce development.
Connect WordPress to CRMs, ERPs, payment gateways, SMS and WhatsApp services through their APIs.
Blocks for listings, calculators, comparisons and dynamic data that core blocks can't handle.
Custom admin pages, reports, bulk tools and settings that save your team time.
Extend existing plugins through their hooks and add-on APIs, never by editing their files, so updates don't wipe your changes.
Review the plugins you run and replace overlapping or abandoned ones with one lean custom plugin.
Plugins built to publish on WordPress.org or sell, with licensing, update delivery and support tools.
What We Build
Bookings, quotes, approvals, job applications and forms that feed your CRM.
Custom post types and fields for directories, listings, events, courses and resources.
Custom product types, pricing, subscriptions and order workflows.
Scheduled syncs and real-time connections with external systems, through our API development team.
Network-wide features and settings for multisite installs. See WordPress multisite management.
Make the Right Call
| Option | Choose it when | Watch out for |
|---|---|---|
| An existing plugin | A well-maintained plugin already does what you need | Abandoned plugins, heavy features you won't use |
| An add-on to an existing plugin | A good plugin does 80% of the job and offers hooks for the rest | Editing the plugin's own files instead of using hooks |
| A custom plugin | Your workflow is unique, data is sensitive, or several plugins are doing one job badly | Building custom when a reliable plugin already exists |
| Code in the theme's functions file | Rarely; only tiny display tweaks | Features disappear when the theme changes |
We'll recommend the simplest option that works. Sometimes that's a well-chosen existing plugin, not new code.
Built Safely
For an independent check of your whole site, see our website security audit.
Tech Stack
React 
Git No paying for, loading or securing features you'll never use.
One well-built plugin can replace several overlapping ones, cutting conflicts and slowdowns.
Your plugin, your code, no subscription that can change price or disappear.
How We Work
What the plugin must do, who uses it, what it connects to, and whether an existing plugin could do the job.
Features, data model, settings, permissions and integrations agreed in writing.
Structure, hooks, database tables and APIs planned for performance and future updates.
Built in sprints on staging, following WordPress coding and security standards.
Automated tests, compatibility checks with your theme and plugins, and security review.
Deployed with documentation and admin training.
Compatibility updates for new WordPress, WooCommerce and PHP versions, plus new features. See WordPress maintenance services.
Engagement
A defined plugin with a fixed price and timeline.
Hire WordPress plugin developer time, full-time or part-time, for ongoing plugin products or a backlog of features.
Plugin development under your agency's brand for your clients.
Why EIT Connect
We'll suggest an existing plugin when it's the better answer.
WordPress security practices and code reviews on every release.
Hooks, not hacks, so WordPress and WooCommerce updates don't break your features.
Clear docs and clean code any competent developer can maintain.
Backed by our WordPress development and WordPress theme development teams.
WordPress plugin development is building add-on software that extends what a WordPress site can do, such as custom features, integrations, admin tools, blocks or WooCommerce extensions, without changing WordPress core or the theme.
When no well-maintained plugin does what you need, when your workflow or data is unique or sensitive, or when several plugins are being stacked to do one job badly. If a reliable plugin already fits, we'll recommend it.
Cost depends on the number of features, integrations, admin screens, blocks, data handling and testing needed. A focused plugin costs far less than a multi-feature product with licensing. We share a fixed estimate after discovery.
A focused plugin usually takes a few weeks including testing. Larger plugins with integrations, dashboards or commercial licensing take longer and are often released in phases.
Not if it's built properly. We use WordPress hooks and APIs instead of editing core or other plugins, test against new WordPress, WooCommerce and PHP versions, and offer support plans to keep it compatible.
Yes, through its hooks or add-on system, so the original plugin can still be updated. We avoid editing a plugin's own files, because those changes are lost on the next update.
Yes. You can hire a dedicated WordPress plugin developer full-time or part-time for ongoing work, or book a fixed-scope project for a single plugin.
Yes. We prepare plugins for the WordPress.org directory, including licensing and review requirements, or build premium plugins with licence keys, automatic updates and support tools.
Tell us what you need and we'll tell you honestly whether to build, extend or buy.
