Custom WordPress Plugin – Tailored Features, API, Gutenberg Blocks

Off-the-shelf plugin doesn’t fit? Need a booking engine, ERP bridge or membership logic? I design and develop secure bespoke plugins—React Gutenberg blocks, REST endpoints, CI/CD, long-term support.

Common Use-Cases I Build

• Course platform with lessons, quizzes, certificates
• Multi-vendor marketplace with split payments
• Real-estate catalog with maps, filters, PDF generator
• Booking system for rentals with iCal sync and deposits
• ERP bridge (SAP, Danea) for stock and orders
• Subscription box with custom shipping calendar
• Patient portal for medical records (GDPR compliant)

Architecture & Best Practices

1. Custom tables for high-volume data (bookings, messages)
2. Namespaced PHP (PSR-4) to avoid conflicts
3. React Gutenberg blocks built with @wordpress/scripts
4. REST controllers with permission_callback and schema
5. WP-Cron or Action Scheduler for background jobs
6. PHPUnit + BrainMonkey for unit tests
7. CI/CD via GitHub Actions and Deployer

Security & Compliance

• Prepared statements / $wpdb->prepare() for all queries
• Nonce verification for admin forms and AJAX
• Capability checks (current_user_can) on every endpoint
• Sanitize and validate input via REST schema
• Escape output (esc_html__, esc_attr) in templates
• GDPR: data export & erase hooks, consent logging

REST / GraphQL APIs

I expose:

• Custom endpoints (/wp-json/myplugin/v1/bookings)
• JWT or OAuth2 for external apps
• Webhook dispatcher (retry queue, HMAC signature)
• GraphQL via WPGraphQL if preferred
• API versioning and deprecation policy

Gutenberg Blocks

• Dynamic blocks with ServerSideRender and PHP render_callback
• InnerBlocks for nested layouts (accordion, tabs)
• Real-time search and select post types
• Block.json metadata for translations and keywords
• Deprecated/migration path when redesigning

Long-Term Support

• Monthly compatibility tests with latest WP/core
• Feature enhancements and refactoring
• Performance profiling and query optimisation
• Security patches within 24 h
• Documentation updates and video refresh

Pre-Development Checklist

• List must-have vs nice-to-have features
• Existing data to migrate (CSV, XML, old plugin)
• User roles and capabilities map
• Third-party integrations (API docs, credentials)
• Hosting limits (shared, VPS, memory)
• Compliance (GDPR, PCI-DSS, accessibility)
• Budget and MVP timeline

Quick FAQ

Will my custom plugin survive core updates?

Yes. I use prefixed namespaces, custom tables and official hooks. Updates are tested in CI before deploy.

Do you provide documentation and training?

Inline docs + user manual + video tutorials for editors and developers.

Can you maintain the plugin long-term?

Monthly maintenance plans include compatibility tests and new features.

Need a Bespoke Plugin?

Send me a short brief or user-story map. I’ll reply with a fixed-price quote and timeline within 24 h.