harmonic design.

Professional Website Design & Development

Harmonic Design is an internationally recognized web design and development agency located in Hamilton, Ontario ๐Ÿ‡จ๐Ÿ‡ฆ

8000+ happy customers
5โ˜… WordPress.org rating

HD Quiz

ultimate quiz builder

HD Quiz is the easiest way to create fun quizzes and embed them onto any page of your WordPress site.

 

HDCommerce

ultimate eCommerce solution

HDCommerce is a complete solution designed to make managing your products easy and intuitive.

 

HDInvoice

create and manage invoices

HDInvoice is the best way to create and manage invoices with online payments, robust logs, and even recurring invoices.

 

Creating is easy when you love what you do

Who We Are

โ€” Cue up the elevator music

Harmonic Design was started by Dylan Forde in Hamilton, Ontario in 2010. We design and build websites for companies around the world โ€” big and small โ€” and every one is built to the same standard: fast, secure, intuitive, and designed to turn visitors into customers.

Our WordPress products have been downloaded more than 300,000 times and run on tens of thousands of sites worldwide. Most of our client work arrives by referral โ€” we'd like to keep it that way.


A website isn't finished at launch. Updates, security patches, and performance tuning are what keep it fast and safe for years โ€” and that's exactly the part most owners don't want to think about. Our Care Plan handles it: we maintain the site, you run the business.

We Are The WordPress Experts

Themes, plugins, maintenance

Harmonic Design is a Hamilton-based WordPress development studio building high-performance, secure, maintainable WordPress websites. We build WordPress the way it was meant to be built: lean, scalable, and engineered to last.

Unlike agencies that rely on bloated page builders and off-the-shelf themes, our work is grounded in clean PHP, modern JavaScript, and WordPress core best practices. Every site we ship loads fast, resists common attack vectors, and stays stable as your business grows.

Performance-first WordPress architecture

Performance-First WordPress Architecture

Website speed is not a feature โ€” it's a requirement. We build WordPress sites with performance baked in from day one.

Our performance approach includes:

  • Minimal, purpose-built themes instead of generic frameworks
  • Optimized database queries and efficient PHP execution
  • Asset optimization (script loading, dependency control, lazy loading)
  • Core Web Vitals optimization for real-world user experience

The result is a WordPress website that feels instant, scores well in performance audits, and converts better because it doesn't get in the user's way.

Security-focused by design

Security-Focused by Design

Security is not an afterthought or a plugin checklist. It's part of the architecture.

We build secure WordPress websites by:

  • Following strict WordPress coding standards and data-handling practices
  • Reducing attack surface by eliminating unnecessary plugins and features
  • Hardening authentication, permissions, and admin access
  • Writing defensive code that assumes hostile input

This proactive approach significantly reduces the risk of common WordPress vulnerabilities while keeping your site stable and easy to maintain.

Built by a WordPress plugin developer

Built by a WordPress Plugin Developer

Harmonic Design isn't just a WordPress user โ€” we are WordPress plugin developers.

We build and maintain production-grade plugins used by real businesses, which means we understand WordPress internals at a level most agencies never reach. That experience translates directly into better architectural decisions, cleaner integrations, and fewer long-term issues for your website.

When custom functionality is required, we extend WordPress properly โ€” without hacks, shortcuts, or fragile dependencies.

Serving Hamilton businesses

Serving Hamilton Businesses with Serious WordPress Needs

As a Hamilton WordPress developer, we work with local businesses that need more than a template site. Whether you're launching a new brand, rebuilding for performance, or fixing a slow and unstable WordPress install, we focus on solutions that are technically sound and business-driven.

If you care about speed, security, and long-term reliability, you're in the right place.

What We Do

โ€” Services, with straight answers

🎨 WordPress Theme Development & Customization

We build custom themes from scratch โ€” no page builders, no bloated frameworks. Your theme contains exactly what your site needs and nothing it doesn’t, which is why our builds stay fast under real traffic and easy to maintain years later.

Custom post types, advanced filtering, responsive layouts, optimized image delivery: built in, not bolted on. Already have a theme? We also overhaul existing templates when a rebuild isn’t warranted โ€” and we’ll tell you honestly which one you need.

⚙ WordPress Plugin Development

Our plugins run on tens of thousands of sites. HD Quiz alone powers quizzes for businesses, universities, and governments, and HDCommerce is a complete eCommerce platform we built and maintain ourselves.

If an off-the-shelf plugin can’t do what you need, we build it โ€” against WordPress core APIs, so it survives updates instead of fighting them. From a small enhancement to a full custom platform, you get code we’d ship under our own name. Because we do.

📈 WordPress Maintenance, Optimization, & Security

A WordPress site left alone gets slower and more vulnerable every month. Our Care Plan is the fix: core, theme, and plugin updates; security scanning and hardening; malware removal; performance tuning and caching; routine backups; and emergency support when something breaks at the worst possible time.

You run your business. We keep the site fast, secure, and online.

💵 How much does a website cost?

It depends on scope โ€” a five-page brochure site and a custom eCommerce build are different animals. Tell us what you need and you’ll get a fixed quote, not an estimate that grows. No retainer required, no pressure.

📅 How long does a build take?

Most sites launch in 4โ€“8 weeks from kickoff, depending on scope and how quickly content and feedback come back to us. You’ll get a real schedule with your quote โ€” and we hit it, because we control the whole stack.

🔧 Can you take over an existing WordPress site?

Yes โ€” a large part of our work is rescuing sites other people built. Slow, hacked, abandoned by the original developer, or held together with seventeen plugins: we audit what’s there, tell you plainly what’s worth keeping, and fix the rest. Most takeovers move onto a Care Plan so it never gets that bad again.

♿ What about accessibility?

Everyone deserves an inclusive online experience. We build to meet or exceed WCAG guidelines as part of the process โ€” semantic markup, keyboard navigation, and readable contrast aren’t an add-on we quote separately.

And we don’t care if you’re on the latest device with gigabit fibre or some terrible satellite service out in the tundra โ€” we build things fast and lightweight so everyone has a great experience.

🇨🇦 Is Harmonic Design based in Hamilton, Ontario?

Yes! Proudly Canadian owned and operated, working with clients globally. And if you’ve read this far down the accordion, you deserve the truth: this one exists mostly for the search engines. The others are more useful, we promise.

Get In Touch

โ€” Need a website, plugin, or custom development?