WordPress Developer Interview Questions and Answers

Landing a WordPress Developer role requires more than just technical chops—you need to demonstrate problem-solving abilities, communication skills, and a genuine passion for building great web experiences. Whether you’re preparing for your first interview or your tenth, having solid answers ready for common WordPress developer interview questions and answers can make the difference between a nervous stumble and a confident conversation.

This guide walks you through the most common WordPress developer interview questions you’re likely to encounter, along with realistic sample answers you can adapt to your own experience. We’ll cover technical deep-dives, behavioral scenarios, and the strategic questions you should ask back to your interviewer.

Common WordPress Developer Interview Questions

What experience do you have with custom post types and taxonomies?

Why they ask: Custom post types and taxonomies are fundamental to extending WordPress beyond its default post-and-page structure. This question reveals whether you’ve worked on projects requiring content beyond standard blogs and can organize information in meaningful ways.

Sample answer:

“In my last role, I built a custom post type for a client’s real estate listings called ‘properties.’ I registered it using register_post_type() in the theme’s functions.php file and added custom fields for price, location, square footage, and agent details. I also created custom taxonomies like ‘neighborhood’ and ‘property-type’ so clients could easily filter listings. This let them manage hundreds of properties without cluttering their regular posts, and visitors could find what they needed without drowning in custom code.”

Tip: Mention a specific client problem you solved. Interviewers want to know your work had real business impact, not just technical execution.

How do you optimize WordPress website performance?

Why they ask: Performance directly affects user experience, SEO rankings, and client satisfaction. This question gauges your understanding of the full optimization stack, from hosting choices to caching strategies.

Sample answer:

“I start with the fundamentals: I recommend quality hosting with good server resources and make sure PHP version is current. Then I layer on caching—I typically use WP Super Cache or W3 Total Cache to reduce database queries. For images, I always compress before uploading and implement lazy loading. I also audit plugins ruthlessly; I’ve removed unused plugins that were silently slowing sites down. On the front end, I minify CSS and JavaScript, use a CDN like Cloudflare, and regularly test with GTmetrix to catch performance regressions. I also keep an eye on the Largest Contentful Paint and Core Web Vitals since Google now ranks on those metrics.”

Tip: Show a methodical approach rather than throwing every optimization at a problem. Explain why each step matters—interviewers appreciate developers who think strategically.

Explain the WordPress template hierarchy and how you’ve used it in projects.

Why they ask: The template hierarchy is core to WordPress theming. Understanding it shows you can navigate WordPress conventions and create efficient, maintainable themes without redundant code.

Sample answer:

“The template hierarchy is WordPress’s decision tree for which template file displays different types of content. For example, WordPress looks for single-product.php before falling back to single.php, then index.php. I use this constantly in customization work. Recently, I needed a unique layout for WooCommerce product pages, so I created woocommerce/single-product.php in the child theme. For a blog client, I created category-news.php to give their news posts a different look than regular blog posts. Understanding the hierarchy means I can make targeted changes without editing core templates or breaking other pages.”

Tip: Mention specific file names and real client scenarios. This proves you’ve worked hands-on with themes, not just read documentation.

How do you ensure website security in WordPress?

Why they asks: WordPress sites are frequent targets for attacks. Developers must know how to harden sites, patch vulnerabilities, and follow security best practices to protect client data.

Sample answer:

“I treat security as an ongoing process, not a one-time setup. First, I keep WordPress core, themes, and plugins updated religiously—vulnerabilities are patched regularly, and staying behind is asking for trouble. I recommend a security plugin like Wordfence that monitors suspicious activity and can block brute-force attacks. I always enforce strong password policies, implement two-factor authentication for admin accounts, and use SSL certificates for all sites. I also limit login attempts and disable file editing through the dashboard. During development, I use staging environments to test updates before they hit the live site. And I set up automated backups with UpdraftPlus so we can quickly recover if something goes wrong.”

Tip: Show that you understand security is a system, not just installing a plugin. Mention specific plugins and practices you actually use.

What’s your experience with the WordPress REST API?

Why they ask: Modern WordPress development increasingly involves the REST API for headless applications, mobile apps, and decoupled architectures. This question tests whether you can work beyond traditional theme development.

Sample answer:

“I’ve used the REST API to pull WordPress data into a React front-end for a client’s content site. I registered custom endpoints to expose specific post data and created a custom API response that shaped the data the way the front end needed it. I also secured endpoints with authentication so not everything was publicly exposed. The API let us treat WordPress as a content management system while giving developers flexibility with the presentation layer. I’ve also used it for mobile app integrations where we pull WordPress posts and custom data into native apps.”

Tip: If you haven’t worked with the REST API, be honest but mention you’ve studied it or built small projects with it. Developers respect learners over exaggerators.

How do you handle plugin conflicts and dependency issues?

Why they ask: Real-world WordPress sites often have multiple plugins that don’t play nicely together. This tests your debugging approach and whether you can troubleshoot systematically rather than panic.

Sample answer:

“When I encounter a plugin conflict, I start by disabling all non-essential plugins and checking if the issue goes away—this isolates the problem. Then I re-enable plugins one by one, checking for the issue after each. Once I’ve identified the culprit, I check for updates, look for alternatives, or see if I can write a small code fix to prevent the conflict. I also check the plugin’s GitHub issues to see if others have reported similar problems. In one case, two analytics plugins were conflicting on tracking events. Instead of choosing sides, I customized one plugin’s settings to prevent the overlap. The key is being methodical rather than reactive.”

Tip: Emphasize your troubleshooting process. This shows maturity and problem-solving skills that transfer beyond any specific scenario.

Describe your experience with page builders like Elementor or Divi.

Why they ask: Page builders are industry standard now. Clients often expect them, and developers need to know when to use them and when custom code is better.

Sample answer:

“I’ve used Elementor extensively for client projects where speed of development is important. It’s great for giving non-technical clients design control, and the drag-and-drop interface means faster turnarounds. That said, I’m careful about over-reliance on builders. For one client’s e-commerce site, I used Elementor for standard pages but wrote custom PHP templates for product archives and single products because the builder was limiting. I always test builder-created sites for performance since bloated markup can be an issue. I also keep layouts in builder templates rather than hardcoding them everywhere—this keeps maintenance manageable.”

Tip: Show balanced judgment. Interviewers like developers who know tools’ strengths and limitations.

What’s your experience with hooks, actions, and filters?

Why they asks: Hooks are WordPress’s extension mechanism. Deep familiarity signals you understand WordPress architecture and can write maintainable, non-destructive code.

Sample answer:

“Hooks are how I extend WordPress without touching core files. I use actions to inject code at specific points—for example, add_action('wp_footer', 'my_custom_footer_script') to load a script before closing the body tag. Filters let me modify data; I’ve used add_filter('the_content', 'my_custom_processing') to modify post content without editing the database directly. I always use hooks in child themes or custom plugins rather than editing the parent theme or core files—this keeps updates non-destructive. Recently, I created a custom action hook in a theme’s template so other developers could inject code without diving into the template file. Understanding hooks lets you write code that plays nicely with WordPress, not against it.”

Tip: Explain why hooks matter (maintainability, non-destructive updates). Don’t just list hook names.

How do you approach responsive design in WordPress themes?

Why they ask: Mobile traffic dominates, and every modern site needs to work beautifully across devices. This tests both your technical skills and your understanding of user experience.

Sample answer:

“I start with mobile-first design, not as an afterthought. I write base CSS for mobile screens, then use media queries to enhance layouts as screens get larger. I rely on flexible grid systems—I typically use CSS Grid or Flexbox instead of fixed widths. In WordPress themes, I ensure the theme itself is responsive-ready; I test across devices regularly using Chrome DevTools and real devices. I also pay attention to touch targets (buttons need at least 44x44px), readable font sizes at small screens, and image scaling. When working with page builders, I always test the built layouts on mobile—sometimes the builder’s defaults need tweaking. I also use Google’s Mobile-Friendly Test to catch issues before launch.”

Tip: Mention specific tools and methods. “I use Chrome DevTools and test on real devices” is more credible than “I make things responsive.”

What’s your experience with WooCommerce development?

Why they ask: WooCommerce powers many WordPress sites. Experience here shows you can handle e-commerce complexity beyond basic theming.

Sample answer:

“I’ve built several WooCommerce shops, from customizing product pages to creating custom product types and payment integrations. I’ve written custom hooks to modify product pricing, created custom checkout fields for specific client needs, and integrated third-party payment gateways. I also manage product data carefully—I’ve seen sites slow to a crawl from poor product organization. I use Rank Math for WooCommerce SEO optimization and manage inventory strategically. One client needed a subscription product model, so I integrated a subscription plugin and custom logic to handle recurring billing. WooCommerce is flexible, but it rewards developers who understand its architecture; cutting corners usually bites you later.”

Tip: Mention specific projects or features you’ve built. Vague answers suggest you haven’t done real WooCommerce work.

How do you version control your WordPress development?

Why they ask: Version control is essential for team collaboration, code history, and deployment safety. This reveals whether you follow professional development practices.

Sample answer:

“I use Git for every project, no exceptions. I create branches for features or bug fixes—never committing directly to main. Once I’ve tested locally, I open a pull request for review, usually with a teammate. This catches issues before they reach staging or production. I keep commit messages clear and descriptive so anyone can understand what changed and why. For WordPress-specific version control, I’m careful about what I commit—I never commit wp-config.php or other sensitive files, and I use .gitignore to exclude node_modules and build artifacts. I also use GitHub or GitLab for backup and collaboration. On deployment, I have a script that pulls from the repository, runs any build steps, and updates dependencies—this keeps production in sync with development.”

Tip: Show you understand both Git mechanics and WordPress-specific considerations. Mention platforms you actually use (GitHub, GitLab, Bitbucket).

Walk me through how you’d debug a WordPress site that’s crashing or throwing errors.

Why they ask: Crashes and errors are inevitable. Your troubleshooting approach reveals whether you’re systematic or scattered, and whether you can stay calm under pressure.

Sample answer:

“My first step is always enabling debugging. I add define('WP_DEBUG', true); and define('WP_DEBUG_LOG', true); to wp-config.php to log errors to debug.log—this tells me what’s actually failing. If the site is completely down, I check the error logs in my hosting control panel. Next, I disable all plugins to see if the issue persists—plugin conflicts cause most site-breaking errors. If disabling plugins fixes it, I re-enable them one by one to isolate the culprit. If the site is still broken after disabling plugins, I switch to a default theme to rule out theme issues. I also check PHP version compatibility and memory limits. Once I’ve identified the problem—whether it’s a bad plugin, insufficient PHP version, or memory limit—I fix it and re-enable features gradually. I always keep backups before troubleshooting so I can roll back if needed.”

Tip: Emphasize your systematic approach. Interviewers want developers who troubleshoot logically, not developers who randomly change things hoping to fix problems.

What tools and resources do you use to stay current with WordPress development?

Why they ask: WordPress evolves constantly. Developers who stay current deliver better solutions and adapt faster to new challenges.

Sample answer:

“I follow WordPress blogs like Make WordPress and WP Tavern to stay on top of core updates and industry news. I’m part of a local WordPress developer meetup group where we share challenges and solutions. I regularly check the WordPress plugin and theme repositories for how experienced developers structure code. I’ve taken courses on modern PHP and JavaScript through platforms like Laracasts. I also experiment with new tools and features in personal projects before using them in client work. Following developers like Alain Schlesser and Marc Lichtenstein on Twitter exposes me to new ideas. Honestly, I think staying current is less about consuming content and more about building things—I learn most by tackling new challenges and looking up solutions when I get stuck.”

Tip: Name specific resources and communities you actually follow. Generic answers like “I read blogs” lack credibility.

Behavioral Interview Questions for WordPress Developers

Behavioral questions explore how you work with others, handle pressure, and approach challenges. Use the STAR method (Situation, Task, Action, Result) to structure compelling answers that prove you’re not just technically skilled but also a good team member.

Tell me about a time you had to meet a tight deadline on a WordPress project.

Why they ask: Deadlines are constant in development. They want to know if you can prioritize, communicate challenges, and deliver quality under pressure.

STAR framework:

• Situation: Describe the project scope and what made the deadline tight
• Task: Explain what you were responsible for
• Action: Walk through how you approached the problem (what did you prioritize? did you communicate early? did you work extra hours?)
• Result: Quantify the outcome (launched on time, no bugs, client happy, etc.)

Sample answer:

“I was building a custom WordPress site for a local nonprofit, and the client moved up their launch date by two weeks—three weeks to completion instead of five. I immediately assessed what could be streamlined: pre-built components instead of fully custom code, a page builder for pages the client could maintain themselves, and a phased launch where we shipped core functionality first and added bells and whistles post-launch. I communicated this plan to the client upfront so they understood the trade-offs. I also worked extended hours the final week. We launched on time with all critical functionality, zero bugs in production, and the client was thrilled we met their deadline without cutting corners on quality.”

Tip: Include specific trade-offs and decisions you made. This shows mature judgment, not just hustle.

Describe a situation where you disagreed with a designer or client about a technical implementation.

Why they ask: Developers don’t work in isolation. They need to advocate for good technical decisions while respecting other perspectives and finding compromises.

STAR framework:

• Situation: What was the disagreement about? Why did you disagree?
• Task: What was your role in resolving it?
• Action: How did you communicate your perspective? Did you listen to theirs?
• Result: What was the resolution? What did you learn?

Sample answer:

“A designer wanted to build a mega-menu with complex animations that looked beautiful but would require tons of JavaScript and custom code. From a performance standpoint, I knew this would slow the site considerably. Instead of just saying ‘no,’ I built a proof-of-concept showing the performance impact and offered alternatives: a streamlined version of the mega-menu that kept the design spirit but was performant, or a simpler menu that loaded faster. I showed metrics to back up my concerns. The designer appreciated the trade-off being clear—they chose the streamlined option, and the client actually loved the cleaner interaction. The lesson for me was that dismissing ideas without understanding the ‘why’ behind them creates friction. Now I try to understand designers’ goals first, then propose solutions that meet their needs within technical constraints.”

Tip: Show that you listened, compromised, and learned. Interviewers like developers who collaborate, not developers who always need to be right.

Tell me about a project that went wrong and how you handled it.

Why they ask: Everything goes wrong sometimes. They want to know if you own mistakes, communicate early, and stay solution-focused rather than defensive.

STAR framework:

• Situation: What went wrong? When did you realize it?
• Task: What was your responsibility?
• Action: How did you respond? Did you communicate immediately or hide it?
• Result: How was it resolved? What did you learn?

Sample answer:

“I launched a WordPress multisite migration for a client and didn’t fully test the domain redirect setup. Some traffic was routing to the old site instead of the new one, causing confusion. I realized the issue within hours of launch and immediately called the client to explain what happened and my plan to fix it. I spent that evening reconfiguring the redirects and testing thoroughly. I fixed it within 24 hours with zero data loss. The client appreciated the transparency and quick resolution more than they minded the initial mistake. Since then, I’ve built a detailed testing checklist for migrations and always do a dry run on a staging environment first. It was a stressful night, but it taught me the importance of thorough testing and overcommunication when things go sideways.”

Tip: Own the mistake without making excuses. Show what you learned. This demonstrates maturity and accountability.

Describe a time you had to learn a new technology or tool quickly to complete a project.

Why they ask: Technology changes fast. They want to know if you’re adaptable and can pick up new skills under pressure.

STAR framework:

• Situation: What did you need to learn? How much time did you have?
• Task: What was the business need?
• Action: How did you approach learning? What resources did you use?
• Result: Did you complete the project? What’s your takeaway?

Sample answer:

“A client needed their WordPress site integrated with a custom REST API from their internal system, and I’d never built a WordPress-to-external-API integration before. I had two weeks. I spent a few days studying the WordPress REST API documentation, reviewing their API spec, and building a small test project. I then built custom endpoints in WordPress that fetched and transformed their data. The trickiest part was handling authentication securely. I reached out to a developer friend who’d done similar work, grabbed a code review from them, and felt confident deploying it. The integration launched on time and is still running smoothly. I realized I learn fastest by building something real and having someone review my work, not by passively consuming tutorials.”

Tip: Show your learning strategy, not just the outcome. Did you use documentation? Ask for help? Build a test project? This reveals your approach to growth.

Tell me about a time you had to explain a technical concept to a non-technical stakeholder.

Why they ask: Client communication matters as much as coding. They want to know if you can translate jargon into plain language without dumbing things down.

STAR framework:

• Situation: What concept did you need to explain? Who was the audience?
• Task: What was the business implication of them understanding it?
• Action: How did you explain it? What analogies or visuals did you use?
• Result: Did they understand? Did it change their decision-making?

Sample answer:

“A client wanted to use a free page builder plugin, but I knew it would slow their site significantly. Instead of saying ‘it’ll increase page load time,’ which doesn’t mean much to a non-technical person, I used an analogy: ‘That plugin adds a lot of code to every page, like putting extra weight in a car—the car still runs, but it’s slower and uses more gas, costing you more money.’ I then showed them data: sites built with that plugin were loading 3+ seconds slower, and Google ranks faster sites higher. I showed them the business impact—slower sites get fewer visitors, fewer customers. I offered an alternative: a lightweight builder that looked similar but performed better. They chose the better option. The lesson was connecting technical choices to business outcomes, not just technical metrics.”

Tip: Use analogies and business metrics, not just technical jargon. Show the “why it matters” as much as the “what it is.”

Give an example of how you’ve improved a process or workflow.

Why they ask: Developers who think beyond individual tasks drive productivity and innovation. This question reveals initiative and continuous improvement mindset.

STAR framework:

• Situation: What process was inefficient or broken?
• Task: What was your role in improving it?
• Action: What changes did you suggest or implement?
• Result: What improved? Can you quantify it?

Sample answer:

“I noticed our theme deployment process was manual and error-prone—developers would FTP files, sometimes forgetting to update dependencies or missing files. I proposed we standardize on Git and set up a deployment script. I wrote a simple bash script that pulls the latest code, runs composer install and npm build commands, clears caches, and deploys to staging and production. We documented the process in our team wiki. Within a month, deployment errors dropped to nearly zero, and deployment time went from 30 minutes of manual work to two minutes. Developers loved not having to remember all the steps. It was a small change, but it made our workflow significantly more reliable and freed up time for actual development.”

Tip: Choose an improvement you actually implemented or proposed, not just noticed. Show the measurable impact.

Technical Interview Questions for WordPress Developers

Technical questions probe your hands-on expertise. Rather than asking you to memorize answers, they want to understand how you think through problems. Focus on frameworks and methodologies rather than just “the right answer.”

How would you create a custom post type and register it properly in WordPress?

Why they ask: Custom post types are core to WordPress development beyond blogging. This tests your knowledge of WordPress APIs and best practices.

Answer framework:

Explain the components of register_post_type():

1. Post type name (unique, lowercase, no spaces)
2. Key arguments: public, has_archive, supports, taxonomies
3. Where you’d register it (theme functions.php or custom plugin)
4. Why you’d use a custom post type (organizing content types, custom metadata, separate archives)

Sample answer:

“I’d use register_post_type() typically in a custom plugin or theme’s functions.php with an init hook. Here’s the basic structure:

add_action('init', function() {
    register_post_type('portfolio', array(
        'label' => 'Portfolio Items',
        'public' => true,
        'has_archive' => true,
        'supports' => array('title', 'editor', 'thumbnail'),
        'taxonomies' => array('portfolio_category'),
    ));
});

I’d also register a custom taxonomy for categorizing portfolio items. The key decision is public (should it be accessible to visitors?) and what you support (editor for content, thumbnail for featured images, etc.). I always use a plugin for custom post types rather than hardcoding in the theme—this keeps functionality separate and theme-agnostic.”

Tip: Show you understand why you make specific choices, not just what the code does.

Walk me through how you’d optimize a WordPress site with 50,000+ posts that’s loading slowly.

Why they ask: Performance optimization at scale reveals your systematic debugging approach and knowledge of WordPress internals.

Answer framework:

1. Diagnosis first – don’t optimize blindly. What’s actually slow? (database queries, rendering, images?)
2. Database optimization – indexing, query optimization, removing unused post types/custom fields
3. Caching strategy – object caching, page caching, query result caching
4. Front-end optimization – image optimization, lazy loading, minimize HTTP requests
5. Infrastructure – hosting, PHP version, CDN

Sample answer:

“I’d start by profiling where the slowness actually is. I’d check MySQL slow query logs and use Debug Bar to see what queries are running. With 50,000 posts, the most likely culprit is inefficient queries—maybe the homepage is querying all 50,000 posts when it should paginate, or the site has custom meta queries that aren’t indexed. I’d optimize the queries first.

Next, I’d implement object caching with Redis if they have it available; this dramatically reduces database load. I’d also review which custom post types and taxonomies are actually used—sometimes legacy data bloats the database.

On the front end, 50,000 posts might mean large archive pages. I’d paginate aggressively and implement lazy loading for images. I’d also check if there are unused plugins bloating the site.

Finally, I’d make sure they’re on decent hosting with current PHP and enough memory allocation. I wouldn’t just throw caching plugins at it—I’d identify the actual bottleneck first.”

Tip: Show a diagnostic mindset. Experienced developers measure before optimizing, not the other way around.

Explain how you’d build a custom WordPress admin dashboard widget.

Why they ask: This tests your knowledge of WordPress admin APIs and your ability to build custom functionality that enhances the user experience.

Answer framework:

1. Register the widget with wp_add_dashboard_widget()
2. Create a callback function that displays widget content
3. Optionally add a save callback if the widget has settings
4. Use WordPress APIs to fetch data (posts, users, custom data)
5. Add appropriate nonces for security

Sample answer:

“I’d use wp_add_dashboard_widget() hooked to wp_dashboard_setup. Here’s the pattern:

add_action('wp_dashboard_setup', function() {
    wp_add_dashboard_widget(
        'custom_analytics_widget',
        'Recent Activity',
        'render_analytics_widget'
    );
});

function render_analytics_widget() {
    // Fetch recent posts
    $recent = get_posts(array(
        'numberposts' => 5,
        'orderby' => 'date',
    ));
    
    echo '<ul>';
    foreach($recent as $post) {
        echo '<li>' . $post->post_title . '</li>';
    }
    echo '</ul>';
}

For something more advanced, I might use the wp_add_dashboard_widget() save callback to store widget settings. I’d always include security—nonces for form submissions, proper sanitization of data. If pulling data from an API or custom table, I’d add caching to avoid slowing down the dashboard.”

Tip: Show you understand the WordPress architecture for admin UI. Mention security considerations.

How would you securely handle user input in a WordPress custom form?

Why they ask: Input handling is critical for security. This tests whether you understand sanitization, validation, and escaping.

Answer framework:

1. Sanitization – clean user input on submission
2. Validation – verify data is what you expect
3. Escaping – display data safely in HTML/database
4. Nonces – prevent CSRF attacks
5. Permissions – check user capabilities before processing

Sample answer:

“Security starts with never trusting user input. Here’s my process:

First, I verify the nonce to prevent CSRF attacks:

if (!wp_verify_nonce($_POST['custom_nonce'], 'my_form')) {
    wp_die('Security check failed');
}

Then I sanitize input:

$email = sanitize_email($_POST['email']);
$name = sanitize_text_field($_POST['name']);

I validate it matches expected format:

if (!is_email($email)) {
    return new WP_Error('invalid_email', 'Invalid email');
}

When displaying data, I escape it:

echo esc_html($name);

And before saving to database, I run it through wpdb prepared statements to prevent SQL injection:

$wpdb->prepare('INSERT INTO table VALUES (%s, %s)', $name, $email);

I also check user capabilities—not everyone should be able to submit certain forms:

if (!current_user_can('edit_posts')) {
    wp_die('Insufficient permissions');
}
```"

**Tip:** Show you understand the layers of security, not just individual functions. Mention specific WordPress functions you'd use.

---

### Describe how you'd approach building a REST API endpoint for a custom post type.

**Why they ask:** Modern WordPress development increasingly uses the REST API. This tests your knowledge of modern WordPress architecture.

**Answer framework:**

1. Make sure the custom post type supports the REST API
2. Decide what fields to expose (you don't expose everything)
3. Create custom endpoints if you need different data shapes
4. Handle authentication if data is private
5. Test thoroughly

**Sample answer:**

"I'd start by ensuring the custom post type is REST-enabled:

```php
register_post_type('book', array(
    'show_in_rest' => true,
    'rest_base' => 'books',
    ...
));

This automatically creates /wp-json/wp/v2/books/ endpoints. If I need custom fields, I’d register them to show in REST:

register_rest_field('book', 'author_bio', array(
    'get_callback' => function($post) {
        return get_post_meta($post['id'], 'author_bio', true);
    }
));

If the default endpoints don’t fit my needs, I’d create custom endpoints:

register_rest_route('myapp/v1', '/books-summary', array(
    'methods' => 'GET',
    'callback' => 'my_books_callback',
    'permission_callback' => '__return_true'
));

For private data, I’d require authentication and check permissions:

'permission_callback' => function() {
    return current_user_can('read_private_books');
}

I’d always test endpoints with Postman before using them in production.”

Tip: Show you understand both default REST endpoints and custom ones. Mention security considerations.

Questions to Ask Your Interviewer

The questions you ask reveal your priorities and show genuine interest in the role. Ask thoughtful questions that help you assess fit.

”Can you walk me through your team’s development workflow? How do you handle code review and deployment?”

Why this matters: You’ll spend hours in this workflow. Understanding how code moves from development to production tells you about the team’s maturity, whether they practice code review (which improves your code), and how risky deployments are.

What to listen for:

• Do they use version control and code review? (good sign)
• Is deployment manual or automated? (automation is safer)
• How often do they deploy? (frequent deployments = less risky changes)
• Do they have staging environments? (prevents surprises in production)

“What does a typical WordPress project look like for your team? Are you mostly working on custom development, client sites, or a mix?”

Why this matters: The type of work directly affects your daily experience. Custom development is different from client services; SaaS WordPress is different from agency work. You want to know if the work aligns with your interests.

What to listen for:

• How much of the work is greenfield vs. maintenance?
• Do they work with clients directly or other teams?
• What’s the project timeline? (rushed vs. thoughtful)
• Do they support projects long-term or hand them off?

”How does your team stay updated with WordPress changes and new technologies?”

Why this matters: This reveals whether the company values continuous learning and invests in its people. It also hints at whether you’ll be perpetually behind or growing.

What to listen for:

• Do they allocate time for learning?
• Do they attend conferences or contribute to WordPress community?
• Are developers encouraged to experiment with new tools?
• Do they have a budget for courses or training?

”What’s the biggest technical challenge your team is facing right now?”

Why this matters: This shows what you’d actually be working on and whether it excites you. It also reveals the company’s technical maturity and priorities.

What to listen for:

• Is the challenge something you’re interested in solving?
• Do they have resources to tackle it or are developers drowning?
• Is it a growth problem (scaling) or a legacy problem (maintaining old code)?

”Tell me about the team culture. What’s it like to work here, especially for developers?”

Why this matters: You’ll spend 40+ hours a week with these people. Culture matters for your happiness and longevity.

What to listen for:

• Do they seem to genuinely enjoy working together?
• Is there support for mistakes and learning?
• Do developers have autonomy or are they micromanaged?
• What’s the work-life balance like?

”What would success look like for someone in this role after the first 90 days?”

Why this matters: This clarifies expectations and shows what matters to the company. It also helps you assess whether you can meet those goals.

What to listen for:

• Are they focused on shipping, learning, or something else?
• Are expectations realistic?
• Do they have a structured onboarding?

”What’s your current tech stack? Are you open to evolving it?”

Why this matters: If they’re locked into outdated tools or refuse to upgrade, you’ll be fighting an uphill battle. You want a team that evolves thoughtfully.

What to listen for:

• What version of PHP, WordPress, etc. are they running?
• Do they have reasons for their choices or is it just inertia?
• Are they willing to adopt new tools that make sense?

How to Prepare for a WordPress Developer Interview

Interview preparation isn’t just about memorizing answers—it’s about genuine understanding and confidence in your abilities. Here’s a systematic approach:

1. Understand the Company’s Technical Stack

Before your interview, research the company’s website and any projects they showcase. Use browser tools to identify:

• What