Custom WordPress, hand-coded — no premium boilerplate, no theme bloat.
We build WordPress themes and content models from scratch for brands that have outgrown drag-and-drop. Senior front-end engineering, ACF Pro content modelling, editorial UX, and Core Web Vitals targets that hold under real-world traffic.
Theme
Content model
Editor
Stack
What is custom WordPress development?
Custom WordPress development means building hand-coded themes, custom blocks, and bespoke ACF content models for a specific brand — not customizing a marketplace theme. The result is a site shaped to your brand and your editorial workflow rather than the average of every brand the theme tried to serve.
Why custom
Off-the-shelf themes are fast to launch and slow to live with.
Premium themes solve the wrong problem — they ship a thousand options nobody on your team will ever touch, and the trade-off is sluggish front-end performance, half-finished editor controls, and code you cannot audit. A custom WordPress theme inverts that: it ships only the components your brand actually uses, named the way your team thinks, with a content model designed for the people doing the writing. The result is a site that feels like part of the brand instead of a hosted-on-WordPress facsimile of one.
What we hear most
Reasons brands graduate from off-the-shelf to custom.
If two or more of these resonate, the next WordPress build should probably be hand-coded.
Theme options panel hides the real settings
Marketing wants to change a hero photo. Three layers of options panels later, they still need a developer. Off-the-shelf themes optimise for sales pages, not for the team running the site.
Performance keeps regressing
Every plugin update bumps a CSS bundle. The page renders fine on a fibre connection in San Francisco and crawls on 4G in Manchester. LCP is past three seconds and trending the wrong way.
The brand lives in Figma, not in the site
The site approximates the design system. It cannot render the spacing, the type pairing, or the motion language the brand actually uses. Every page becomes a small compromise.
Editor experience is hostile to writers
The Block Editor was supposed to fix this. Out of the box it ships dozens of blocks your team will never use and zero of the ones they actually need. Writers retreat to plain paragraphs and the design system erodes.
Premium themes carry baggage
Sliders nobody uses. Mega-menus with seven nesting levels. License key validation that pings a server you do not control. Code you can read but cannot easily change.
Multilingual or multisite is on the roadmap
Premium themes rarely play nicely with WPML or Polylang at scale. A custom theme is built around the multilingual model from day one, not around it.
What we deliver
What ships in a custom WordPress build.
A complete, documented WordPress system — design system, theme, content model, editor experience, and the launch infrastructure underneath.
Theme
- Custom hand-coded PHP theme — no parent theme, no premium boilerplate
- Modern build pipeline (Vite or esbuild), PostCSS, autoprefixer
- Server-rendered Gutenberg blocks with React-powered editor controls
- Component library mapped 1:1 to your design system
- Documented theme structure your team or agency can extend
Content model
- ACF Pro field groups with named, labelled fields
- Custom post types and taxonomies designed around your editorial workflow
- Reusable blocks for callouts, pull quotes, CTAs, embeds
- Field validation and conditional logic so editors cannot break templates
- Optional REST or GraphQL endpoints for headless front-ends
Performance
- LCP < 2.0s and CLS < 0.05 targets verified on real-user CWV data
- Critical CSS, font subsetting, and lazy-loaded JS by default
- Image policy: AVIF/WebP with srcset and explicit dimensions
- Object Cache Pro or Redis where it pulls its weight
- Cloudflare or Bunny CDN with a sensible cache plan
SEO & schema
- Information architecture and internal linking by intent
- Schema (Organization, Article, FAQ, Service, BreadcrumbList) at the template level
- XML sitemap, robots, canonical, hreflang configured properly
- OG and Twitter meta with dynamic per-page imagery
- Programmatic redirect map for migrations
Handover
- Loom-led walkthroughs for the editorial team
- Theme conventions documented in the repo
- Recorded handover for new developers joining the project
- 30 days of post-launch support included
- A retainer relationship if you want one — no ghosting if not
Process
How this service runs end to end
The same six-step shape we use across every Haxtiv project — adapted to the specifics of this scope.
01
Discover
Audit, intent, and the part nobody is saying out loud
We open with a working session — not a deck. We pull analytics, crawl the existing site, audit the brand, and interview the people closest to revenue. We surface the friction inside the team, not just the friction on the screen.
02
Define
Sitemap, story, and the metrics that actually matter
We define the audience journeys, the commercial pages we are willing to defend, the SEO architecture, and the measurable outcomes. You get a shape of the project that survives feedback because it was built on evidence.
03
Design
Editorial system, art-directed, never templated
Type, grid, motion, and tone built as a system. We design the hero, the long pages, the unloved corners, and the empty states. Every screen looks like it belongs to the same studio. Nothing is parked for later.
04
Build
Production code your team can keep
WordPress, Shopify, or page builder — we build clean, accessible, performant, and documented. Component-led, naming you'll recognize next year, and a changelog your in-house team can read.
05
Launch
Migration without losing rankings or sleep
Pre-launch crawl, redirect map, schema and metadata cutover, performance baseline, and a launch playbook. We run the deploy with you, not at you.
06
Grow
Care plan, CRO sprints, and quiet improvements
We stay involved. Monthly performance reports, security and core updates, and CRO sprints that compound. The site gets better the longer you keep us.
What this looks like in production
Numbers we earn, not numbers we round up.
Sites shipped
across 27 countries
Studio hours
delivered since 2019
Avg conversion lift
post-redesign clients
Client retention
into year two
In their words
Senior teams who chose us.
Haxtiv replatformed our marketing site without losing a single ranking. We saw organic leads up 38% inside the first quarter and the editorial team finally has a layout system they don't fight.
Mara Iglesias
VP Marketing · Lumenwave Health
Headless WordPress redesign
Our previous Shopify build was a Frankenstein of apps. The Haxtiv team simplified the stack, rebuilt the PDP and CRO patterns, and our store is faster and more profitable than it has ever been.
Daniel Korver
Founder · Northbound Goods
Shopify Plus rebuild
Frequently asked
Answers worth asking for.
Don't see the question you're holding? Send it to [email protected] and we'll answer the same day.
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Where to go next
WordPress development
Our top-line WordPress service.
WordPress design agency
Editorial WordPress design system.
Gutenberg development
Block-first WordPress with theme.json, FSE.
Custom Gutenberg blocks
React and ACF blocks scoped to your design system.
Headless WordPress
Next.js front-end, WordPress backend.
WordPress theme development
Bespoke themes.
WordPress plugin development
Custom plugins for unique workflows.
Hire WordPress developers
Senior dedicated engineers.
Start here
Let's design a WordPress build that fits the brand instead of fighting it.
30-minute call with a partner. We'll sketch the right shape, share a fair quote, and tell you the parts other agencies skip.