WordPress powers over 43% of the internet, and its plugin architecture makes it infinitely extensible. JSKenya Solutions Limited develops custom WordPress plugins that add precisely the functionality your site needs without the bloat of generic solutions. From advanced booking systems and custom payment integrations to M-Pesa gateways, custom post type managers, membership systems, and complex API integrations, we have built plugins across virtually every industry. Our plugins are coded to WordPress standards, thoroughly tested for compatibility with major themes and plugins, and optimised for performance. We can also audit, extend, or repair existing plugins that are causing issues on your site. Every plugin we deliver comes with clear documentation and source code, giving you full ownership and flexibility for the future.
WordPress Plugins
Extend the power of your WordPress site with custom plugins built precisely for your requirements. No compromise, no workarounds.
About Our WordPress Plugins Service
Plugins We Build for Your WordPress Site
We have built custom WordPress plugins across a wide range of use cases. Here is a detailed look at the six most common plugin types we deliver and exactly what each one includes.
M-Pesa and Payment Gateway Plugins
WooCommerce and standalone checkoutOur most requested plugin type. We build fully integrated M-Pesa payment gateways that connect your WooCommerce store or standalone checkout page to Safaricom Daraja, handling STK Push, Paybill, and real-time payment confirmation callbacks without the customer ever leaving your site.
- M-Pesa STK Push with real-time callback handling and order status update
- Paybill and Buy Goods integration with manual and automated confirmation
- Pesapal, Flutterwave, and Stripe gateway plugins for card payments
- Admin payment log with transaction IDs, amounts, and timestamps
- Automated payment confirmation SMS to customer on successful payment
- Sandbox and production environment switching from the admin panel
- Reconciliation report exportable to CSV for accounting purposes
Custom Post Types and Admin Interfaces
Structured content management for editorsWhen your content does not fit neatly into posts or pages, a custom post type plugin gives your editorial team a purpose-built interface with exactly the fields, validation, and organisation they need. We build clean, intuitive admin experiences your non-technical team can use confidently.
- Custom post type registration with correct labels, capabilities, and rewrite rules
- Custom taxonomies for structured categorisation and filtering
- Meta boxes with text, number, date, file upload, relationship, and repeater fields
- Admin list table customisation with sortable and filterable columns
- Input validation and sanitisation with clear error messaging for editors
- Bulk action support for managing large volumes of content efficiently
- Custom admin pages, settings panels, and dashboard widgets
Booking and Appointment Scheduling
Services, rentals, and event registrationsA custom booking plugin built specifically for your service model, availability rules, and payment requirements. Whether you are scheduling appointments for a clinic, managing rentals for a venue, or handling registrations for a training programme, we build the exact flow your customers need.
- Availability calendar with configurable working hours and blocked dates
- Single and multi-resource booking with conflict prevention
- Front-end booking form with real-time availability checking
- M-Pesa or card deposit and full payment at booking
- Automated booking confirmation, reminder, and cancellation emails and SMS
- Admin booking management dashboard with calendar and list views
- Customer booking history and rescheduling self-service portal
Membership and Content Access Control
Subscription sites, portals, and directoriesProtect and monetise your WordPress content with a custom membership plugin that enforces access rules based on subscription tier, membership status, location, or any other criteria your business model requires. Fully integrated with M-Pesa and card payment for subscription billing.
- Membership tiers with configurable content access rules per tier
- Page, post, category, and custom post type access restriction
- M-Pesa and card subscription billing with automated renewal reminders
- Member registration, profile management, and password self-service
- Trial periods, grace periods, and membership expiry handling
- Member directory with searchable profiles and custom fields
- Admin membership reports with renewal, churn, and revenue metrics
API and Third-Party Integration Plugins
CRMs, ERPs, SMS gateways, and data feedsConnect your WordPress site to external systems using a custom integration plugin built for the specific APIs involved. We handle authentication, rate limiting, error handling, retry logic, and data mapping so the integration is reliable in production, not just in a demo environment.
- CRM integration pushing form submissions and user registrations to your sales pipeline
- SMS gateway integration for customer notifications via Africa's Talking or Twilio
- ERP and accounting software data synchronisation with scheduled background processing
- Real estate, property listing, and MLS data feed import and display plugins
- Custom REST API endpoints exposing your WordPress data to mobile apps or other systems
- Webhook listeners for processing inbound data from payment processors and external platforms
- Admin integration health dashboard showing sync status, errors, and last-run timestamps
Plugin Audit, Repair, and Extension
Fix, extend, or improve existing pluginsIf an existing plugin is causing white screens, conflicts, security vulnerabilities, or simply does not behave the way it should, we can identify the root cause and fix it. We also extend existing plugins cleanly using proper WordPress patterns so your changes survive every future plugin update.
- Root cause diagnosis of plugin conflicts, fatal errors, and unexpected behaviour
- Security audit covering SQL injection, XSS, CSRF, and privilege escalation risks
- Performance profiling using Query Monitor to identify slow queries and unnecessary calls
- Clean extension of third-party plugins using hooks, filters, and companion plugins
- Refactoring of poorly written plugins to meet WordPress coding standards
- Compatibility fixes for PHP version upgrades and WordPress core updates
- Written audit report detailing every issue found and every change made
Built to WordPress Standards
Every plugin we write follows the WordPress Plugin Handbook and coding standards. Here is what that means in practice for your site and your team.
Nonce Verification
Every form submission and admin action is verified with a WordPress nonce to prevent cross-site request forgery attacks.
Capability Checks
All privileged operations check the current user has the correct WordPress capability before executing, preventing privilege escalation.
Input Sanitisation
Every value entering the database passes through the appropriate WordPress sanitisation function. No raw user input ever reaches a query.
Output Escaping
Every value rendered to the browser is escaped with the correct WordPress escaping function, preventing XSS attacks.
Prepared Statements
All database queries use wpdb prepared statements or Eloquent. Direct string interpolation into SQL queries is never used.
Hook Architecture
Functionality is exposed through actions and filters so themes and other plugins can modify behaviour without editing plugin files.
Performance First
Scripts and styles are enqueued only on pages that need them. Expensive operations use transients and the WP Cron API.
Full Documentation
Inline code comments, a readme.txt, and an end-user guide are delivered with every plugin. Nothing is left unexplained.
Inside a JSKenya WordPress Plugin
Every plugin we deliver is cleanly structured, fully documented, and built to survive WordPress updates. The illustration below shows how we organise a typical plugin delivery.
Our Delivery Process
Requirements & Scoping
We document exactly what the plugin needs to do, how it integrates with your theme and other plugins, and any performance considerations.
Architecture Planning
We design the plugin architecture with hooks, filters, admin pages, and data structures before writing a line of code.
Development & Testing
Plugin is built following WordPress coding standards, tested across multiple PHP versions and WordPress releases.
Security Review
We audit for common WordPress vulnerabilities: SQL injection, XSS, CSRF, and privilege escalation before delivery.
Documentation
Full developer documentation and an end-user guide are provided with every plugin delivery.
Support & Updates
We maintain the plugin for WordPress core updates and add new features on request under a support agreement.
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Talk to our team today. We offer free initial consultations and will provide a detailed, transparent quote with no hidden fees.