Quick answer: A good WordPress developer in 2026 knows PHP, block themes and Full Site Editing, basic security hardening, and performance optimization, not just how to install plugins. If a candidate only knows classic PHP themes and page builders, they’re working with tools that WordPress itself has already moved past.
WordPress has changed more in the last three years than in the decade before it. That matters directly for hiring, because the skills that made someone a solid developer in 2020 don’t automatically make them one now.
Why This List Looks Different Than It Would Have a Few Years Ago
The biggest shift is Full Site Editing, or FSE. According to WordPress.org’s official documentation, block themes now handle every part of a site, headers, footers, navigation, entirely through blocks, rather than requiring PHP template files for structural changes.
That’s not a minor feature update. It changes how a competent developer actually builds a site day to day. A developer who’s never touched block themes or the Site Editor is working with an outdated toolkit, even if they’re technically still writing valid WordPress code.
Core Skill 1: PHP, Still, Just Applied Differently
PHP hasn’t disappeared. Business logic, custom post types, and REST API endpoints still run through it. However, the days of editing raw PHP template files for every visual change are fading fast, since block themes now handle that layer through HTML and block markup instead.
A good developer today knows when PHP is actually necessary versus when the block editor already solves the problem. Someone who defaults to custom PHP for tasks the Site Editor handles natively is often working harder than the job requires.
Core Skill 2: Genuine Comfort With Block Themes and the Site Editor
Ask a candidate to explain the difference between a block theme and a classic theme. A developer with real 2026 experience answers this without hesitation, because it’s become the default way WordPress themes are structured now.
They should also understand theme.json, the configuration file controlling global styles, colors, and typography across block themes. A developer unfamiliar with theme.json is likely still building the way WordPress worked several versions ago.
Core Skill 3: Security as a Baseline, Not an Afterthought
Outdated plugins remain one of the most common ways WordPress sites get compromised. A good developer keeps plugins updated deliberately, uses strong authentication practices, and avoids installing unnecessary plugins that widen your site’s attack surface.
This isn’t advanced knowledge. It’s baseline hygiene that separates developers who think about your site’s long-term health from those who only care about getting it launched.
Core Skill 4: Performance Optimization Beyond “Install a Caching Plugin”
Real performance work means understanding what’s actually slowing a site down: unoptimized images, excessive plugin bloat, poor hosting, or render-blocking scripts. A developer who reaches for a caching plugin as the only fix, without diagnosing the actual bottleneck, is treating a symptom rather than the cause.
Block themes genuinely help here. A clean block theme typically ships with far less JavaScript than a heavy page-builder site, which is one practical reason experienced developers have shifted toward them for new projects.
Core Skill 5: WooCommerce Fundamentals, Even for Non-Store Projects
Not every project involves e-commerce, but a good WordPress developer should still understand WooCommerce’s basics, since many clients eventually want to add a store, even if they don’t need one on day one. A developer who’s never touched WooCommerce may struggle to plan a site’s structure for that future possibility.
If your project specifically involves a store, the skill bar goes considerably higher. I’ve covered exactly what to check for in that scenario in what to look for in a WooCommerce developer.
Core Skill 6: Clear Communication, Not Just Technical Skill
Here’s something that rarely makes these lists but matters enormously in practice. A developer who can explain a technical trade-off in plain language, why a feature will slow the site, why a shortcut now creates problems later, saves you from making uninformed decisions about your own project.
Technical skill without communication just means you’ll get surprised later by decisions you never understood. Ask candidates to explain something technical to you directly during the hiring process, and pay attention to whether the explanation actually lands.
The Red Flag Most Clients Miss: Still Only Building Classic PHP Themes
Here’s my honest opinion. A developer who’s never built anything on a block theme, and still relies entirely on classic PHP templates and heavy page builders for every project, isn’t necessarily bad. But they are behind where the ecosystem has moved, and that gap tends to show up later as slower sites, harder content editing, and features that take longer to build than they should.
This doesn’t mean page builders like Elementor are automatically wrong. Plenty of solid developers still use them well for specific project needs. The red flag is a developer who’s unaware block themes exist as an option at all, not one who’s made an informed choice between approaches.
If you’re vetting candidates generally, not just for technical currency, it’s worth reviewing broader hiring risks too. I’ve covered those in more detail in red flags to watch for when hiring a freelance developer.
How Does This Affect What You Should Budget?
Developers current on block themes, FSE, and modern performance practices often charge similarly to developers using older approaches, since pricing tracks experience more than specific tooling. However, the value difference shows up later, in a site that’s faster, easier to update, and less prone to plugin conflicts.
I’ve broken down realistic 2026 pricing across experience levels in my WordPress developer cost guide, which is worth reviewing alongside this checklist before you finalize a hire.
Frequently Asked Questions
What’s the most important skill for a WordPress developer to have in 2026?
Comfort with block themes and Full Site Editing is the biggest differentiator now, since it’s become the standard way WordPress sites are structured and edited.
Is PHP still necessary for WordPress development?
Yes. PHP still handles business logic, custom functionality, and REST API work, even though block themes have shifted much of the visual template layer away from PHP files.
Should I avoid a developer who only uses page builders like Elementor?
Not necessarily. Page builders remain useful for specific projects. The concern is a developer who’s unaware of block themes as an alternative, rather than one who’s made an informed choice.
Does a good WordPress developer need WooCommerce experience?
At least basic familiarity, yes, since many sites eventually add e-commerce features. Deep WooCommerce expertise matters most specifically for store-focused projects.
How can I tell if a developer’s skills are current for 2026?
Ask them to explain the difference between block themes and classic themes, or what theme.json does. A developer with current experience answers this comfortably.
Does hiring a more current developer cost more?
Not necessarily. Pricing tracks overall experience more than specific tooling, though a developer skilled in modern practices often delivers a faster, more maintainable site for the same rate.
Want a Developer Who’s Current on Modern WordPress?
If you’re planning a project and want it built on the current WordPress standard, not outdated tooling, message me on WhatsApp and tell me what you need. I’ll give you a straight read on the right approach.