Wordpress Plugin Development

WordPress Plugin Development London

Webpop Design is a London-based WordPress plugin development agency, building bespoke plugins for growing businesses since 2008. Our custom WordPress plugins solve everyday business problems, extend WooCommerce and integrate the tools your team already relies on.

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WordPress Plugin Agency
WordPress Plugin Developers

Wordpress Plugin Development Services For London Businesses.

Webpop Design delivers WordPress plugin development services built for real-world use, not quick hacks. If you need reliable features, clean admin tooling, or custom workflows, our WordPress plugin developers scope it properly and ship maintainable code.

  • Custom Plugin Development

    Custom WordPress Plugin Development

    We build bespoke WordPress plugins when ready-made plugins don't fit. Each one is shaped around your workflows, your data and your team's day-to-day. Bespoke WordPress plugin development delivers tidy, easy-to-update code with tailored functionality at its core. No clutter, no compromises.

  • WooCommerce Plugin Development

    WooCommerce Plugin Development

    WooCommerce gets you started, but rarely covers everything. We build plugins that extend Woo with custom pricing, product rules and back-office tools. Custom WooCommerce plugin development like this is built to handle busy stores cleanly. Secure, ready to grow and properly tested.

  • Plugin Customisations

    Plugin Customisation and Extensions

    You don't always need a new plugin, just an improved version of one you have. We extend and customise existing plugins to fit your business, adding bespoke functionality without breaking updates. Sensible additions, cleanly applied. Built to last.

  • Api Integrations

    API Integration Plugins

    When your website needs to talk to other systems, we build the plugin to connect them. Our WordPress API integrations are secure and reliable from day one. REST API integration sits at the heart of how we link modern systems. No messy workarounds, just clean connections.

  • Admin Workflow Plugins

    Admin and Workflow Tools

    Most teams lose hours every week to fiddly admin jobs. We build WordPress admin tools that include custom dashboards, fields, reports and workflow tools inside WordPress to fix exactly that. Your team gets simpler, quicker ways to manage content, orders and data through your WordPress admin dashboard.

  • Subscription and Membership Plugins

    Subscription and Membership Plugins

    Recurring revenue relies on a system that quietly does its job. We build subscription and membership plugins that handle billing, renewals, gating and cancellations without fuss. Member areas stay accurate and payments stay smooth. Properly built, properly tested.

  • Booking & Reservation Plugins

    Booking and Reservation Plugins

    Booking systems sound simple until you actually run one. We build plugins that handle availability, calendars, step-by-step bookings, payments and customer messages around your business. No clumsy processes, no double-bookings. Just a system your team can rely on.

  • Custom Gutenberg Blocks

    Custom Gutenberg Blocks

    The WordPress editor is only as good as the blocks your team has to work with. We build custom Gutenberg blocks matched to your brand, content layouts and publishing process. Marketing gets flexibility without breaking the design. Developers get tidy, reusable blocks.

  • Website Security

    Plugin Performance Optimisation

    A slow plugin can slowly drag a whole site down. We review, tidy and rebuild plugin code to remove clutter and ease pressure on the database. The result is faster pages, lower hosting costs and better page speed scores. Customers and Google both notice.

  • Plugin Security Hardening

    Plugin Security and Hardening

    Plugins are the most common weak spot in a WordPress site. We strengthen custom and third-party plugins against risks, loose permissions and outdated components. Secure WordPress plugins start with code that's reviewed, tested and maintained. Your platform stays solid, not constantly under repair.

  • Ongoing Website Support

    Plugin Maintenance and Support

    Plugins need looking after long after going live. We maintain, fix and update plugins as WordPress and your tools change. Ongoing plugin support means a clear point of contact and a reliable response. No hidden problems, no surprises.

  • Legacy Plugin Refactoring

    Legacy Plugin Refactoring

    Old plugins don't age well when nobody wants to touch them. We tidy the code and bring it up to current WordPress standards, keeping the logic you rely on. A cleaner, faster, safer version of what you already have. Built to last.

WordPress Plugin Development Examples From Recent Work.

  • Tender Import Plugin

    We built a tender import plugin that pulls live opportunities from Contracts Finder, Sell2Wales, Find a Tender and similar APIs into custom post types. Imports run on demand or via cron, keeping bid teams in front of every relevant opportunity automatically.

  • Vehicle Import Plugin

    We built a vehicle import tool for car dealerships that pulls in full product data, specifications, imagery and pricing at the click of a button. Stock stays accurate across the website without manual entry, freeing the sales team to focus on selling.

  • Sports Data Sync

    We built a sports data plugin that integrates with the Sportmonks API to fully automate the import of fixtures, players, results and league data. Sports content stays current around the clock, with no admin intervention or manual updating needed.

  • Games and Software Sync

    We built a games and software import plugin that connects to multiple gaming APIs to populate listings with titles, artwork, descriptions and metadata. Catalogues grow and update automatically, keeping the site fresh without burning hours on data entry.

  • AI Blog Writing

    We built an AI writing plugin that uses the OpenAI API to draft blog posts directly inside WordPress. Editors get well-structured first drafts in seconds, dramatically reducing the time and cost of producing regular, search-friendly content at scale.

  • Crypto Wallet Login

    We built a Web3 login plugin that lets users sign in with MetaMask, WalletConnect and other major crypto wallets, with full WooCommerce integration. Customers checkout using their existing wallets, opening up a faster, modern path to purchase.

  • Email Queue Plugin

    We built an email queue plugin that triggers and schedules transactional and marketing emails based on user actions. Communication stays timely and consistent, reducing missed touchpoints and keeping deliverability healthy at higher volumes.

  • Gravity Forms Extensions

    We built bespoke Gravity Forms extensions that add custom field logic, conditional workflows and third-party integrations. Forms capture cleaner data and trigger the right actions, removing manual handling between the website and internal systems.

  • WooCommerce Extensions

    We built WooCommerce extensions covering custom pricing, shipping logic, checkout and bespoke product behaviour. Stores get the exact functionality needed without using multiple third-party plugins, keeping performance and admin overhead under control.

  • Auto Schema Plugin

    We built a structured data plugin that automatically generates and outputs schema markup based on each custom post type. Search engines understand the content properly, supporting richer SERP listings and stronger long-term visibility without any manual tagging.

  • Markdown Conversion

    We built a Markdown conversion plugin that automatically turns pages and posts into clean output for AI crawlers. Large language models read and cite the content easily, future-proofing visibility as AI search continues to grow.

  • Property Feed Import

    We built a property feed plugin that integrates with Property Hive to import listings, branch data and imagery directly into WordPress. Estate agents publish accurate, up-to-date stock automatically, with no double-handling between their CRM and the website.

Desktop Device Wordpress Plugin Development London
Macbook Device Custom Plugin Development

Hire a WordPress Plugin Agency in London That Delivers.

Plugin development isn’t a side job at Webpop Design. It’s been part of our work since 2008, across more than 300 custom WordPress builds. Every plugin is delivered by senior developers, never juniors. Our experienced WordPress plugin developer team plans properly and writes tidy, well-documented code that lasts.

Off-the-shelf plugins are built for the average user, not your business. They cover common needs well, but rarely fit specific workflows, edge cases or how your team actually works. Business-specific plugins are different. Yours alone, built around your workflow, and ready to change when your business does.

Plugins are business tools. Done right, they save hours and stop small problems becoming emergencies. Done badly, they cost twice. We focus on the outcome. Cleaner workflows, fewer support requests, real returns. Founders come to us looking for WordPress plugin developers UK businesses can genuinely trust.

WordPress Plugin Integration Services Across Your Existing Stack.

Most businesses don’t run on one platform. Your CRM, accounting tool, ERP, marketing stack and shipping provider all need to connect to WordPress. We build plugins that connect those systems cleanly, using secure APIs and reliable webhooks. Solid plugin integration like this means no messy middleware, no tangled code.

As a specialist WordPress plugin agency, we’ve built third-party API integrations across the platforms serious businesses actually use. Salesforce, HubSpot, Mailchimp, Klaviyo, Xero, QuickBooks, Sage, Stripe, GoCardless, Royal Mail, Algolia and dozens of niche industry systems. From bespoke WooCommerce development to back-office syncs, each is engineered to keep your data accurate and your team out of firefighting mode.

Integration is where poor builds usually fail. We treat it as essential infrastructure. Our plugins are written to fail safely, report clearly, and recover on their own when something else goes wrong. That’s the difference between a connected business and an unreliable one.

Kick-Off Call and Discovery
Step 01

Kick-Off Call and Discovery

Every plugin starts with a proper chat. We sit down with you to understand the business problem, the people who'll use the plugin and the business result you want. We ask the tough questions early. By the end of kick-off, we share a clear understanding of what success actually looks like for your team.

Specification and Scope
Step 02

Specification and Scope

Next we turn the conversation into a written specification. Features, user roles, edge cases, integrations and what's explicitly out of scope. This becomes the document we both work from, so there's no confusion later. Clear scope protects your budget, your timeline and the quality of the plugin we hand over.

Architecture and Planning
Step 03

Architecture and Planning

Before any code is written, we plan the architecture. That means the data structure, connections, components and security, and any place your plugin will integrate with WordPress, WooCommerce or third-party APIs. Time spent planning here saves time and money later. It's the bit cheaper builds tend to skip and pay for later.

Backend Setup
Step 04

Development Environment Setup

We then prepare the development environment to match how your business actually runs. That covers version control, staging, deployment process, PHP versions and any in-house tools your future developers will inherit. Everything is properly documented from day one, so the plugin is as easy to maintain in year three as it is on launch day.

Core Plugin Development
Step 05

Core Plugin Development

This is where senior engineers build the core of the plugin. Tidy, well-explained code, proper use of WordPress's built-in tools, and architecture that follows current standards. We work in steady stages with regular demos, so you see real progress, give early feedback and stay close to how the build is coming together.

Plugin Integration Ecommerce
Step 06

Integrations and Ecommerce Logic

Then we connect the plugin to the systems your business depends on. WooCommerce extensions, payment gateways, CRMs, ERPs, accounting tools and any custom APIs in your stack. We build for real-world conditions, including failed webhooks and usage limits, so reliable integration is what separates a working plugin from a fragile one.

Testing Quality Assurance
Step 07

Testing and Quality Assurance

Nothing goes live without thorough testing. We test across the WordPress versions, server setups, browsers and devices your business actually uses, including the tricky situations real users find. Code is checked line by line for security, performance and connection stability before launch.

Plugin Release and Support
Step 08

Release, Support and Iteration

Launch day is a milestone, not the end. We deploy carefully, monitor closely over the first weeks and stay on hand for any tweaks. From there, ongoing maintenance, security updates, WordPress and WooCommerce updates, and ongoing improvements as your business evolves. The plugin keeps doing its job.

Want Custom WordPress Plugin Development Tailored to Your Business? Let's Build It Together

Tell us the problem, workflow or integration, and we’ll come back with a plan, realistic timeline and pricing. Senior developers, flawless functionality and plugins that work.

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Plugin Development Results, in Our Clients' Own Words.

Real feedback from founders who've trusted us with custom WordPress plugin development.

Frequently Asked Questions.

Honest answers to the questions serious buyers ask us most about WordPress plugin development.

Frequently Asked Questions
Wordpress Plugin Work

How much does WordPress plugin development cost?

Custom WordPress plugin costs depends entirely on scope, complexity and the integrations involved. A focused single-purpose plugin sits at one end of the scale, while a multi-feature WooCommerce extension with third-party APIs sits comfortably at the other. We give a realistic, clear breakdown after discovery, so there are no nasty surprises later. Tell us what you need and we’ll come back with clear numbers, a sensible timeline and an honest view of what’s worth building.

Most bespoke plugins run from four to twelve weeks, with more complex ecommerce or integration projects landing beyond that. Timelines depend on scope, the number of systems involved, the depth of testing required and how quickly feedback comes back from your team. We work in clear stages with regular updates, so you always know what’s coming next. After discovery we give you a realistic timeline, not an optimistic one.

Both. Sometimes the right answer is a fresh, bespoke plugin built around your business. Other times it makes more sense to extend or tidy up a plugin you already use, saving budget and avoiding unnecessary rebuilds. We assess what you have, weigh up the options honestly and recommend the route that gives you the best long-term result. The aim is the cleanest, most cost-effective fit, not the biggest bill.

Yes, and we’ve been doing it for years. Building safely with WooCommerce means using its built-in tools and APIs properly, never altering WordPress itself, and testing thoroughly against real shop conditions. Our extensions are written to survive WooCommerce and WordPress updates without breaking checkout, orders or stock. We treat your store as business infrastructure, because that’s exactly what it is. Reliability is essential.

Yes, almost always. We’ve built plugin integrations across CRMs, ERPs, payment gateways, accounting tools, marketing platforms, shipping providers and custom client APIs. CRM integration is one of our most-requested specialisms. ERP integration is equally well-trodden ground for our team. Each integration is built around secure requests, reliable webhooks and smart error handling, so your data stays accurate and your team stops chasing data errors. If your system has an API or webhook, we can almost certainly connect it cleanly to WordPress.

Compatibility is something we plan for from the start, not something we hope for at launch. Plugin compatibility comes from proper discovery — we review your current theme, plugins, hosting and PHP versions, then design the plugin to work cleanly alongside everything already installed. We test in a test environment that mirrors your live site, so any conflicts are caught and resolved before they ever reach your customers or your team.

Performance is built into the architecture, not added at the end. We write efficient database calls, avoid unnecessary requests, use caching properly and keep page files small. Each plugin is tested under realistic conditions, including high traffic and big catalogues, before it goes live. The result is custom functionality that genuinely earns its place, without harming page speed scores or your hosting costs.

Security is treated as a top priority throughout. We follow WordPress coding standards, check and clean all data going in and out, use safe database queries, tighten permissions and protect any open access points. Code is reviewed by another developer and tested for common security risks before launch. We also keep dependencies current and update responsibly, so your plugin doesn’t quietly become the weak point in your setup.

Yes. We’ve built and maintained plugins across multisite setups for organisations running multiple brands, regions or sub-sites from a single WordPress installation. Multisite has its own quirks around shared databases, network-wide setup and per-site settings, and our plugins are built with those realities in mind. If you run a multisite environment, we’ll plan for it properly from day one rather than retrofitting later.

You own the code fully. Once the plugin is delivered, it’s yours to host, edit and extend or hand to another developer however suits your business. We write to current WordPress standards, document the architecture properly and structure the code so another developer can pick it up later. No tie-ins, no hidden code. Most clients stay with us because they choose to.