WordPress Backend & API Developer (Project-Based)

About Us
We are an internationally award-winning design agency, crafting high-impact digital experiences for brands across various industries. Our team blends strategy, design and technology to deliver pixel-perfect, user-focused solutions.

We are currently looking for a project-based Senior WordPress Developer who can collaborate with our design and strategy teams to transform complex ideas into robust, scalable WordPress solutions.

Role Overview

As our WordPress Development Specialist, you will be responsible for building and extending custom WordPress solutions with a strong focus on:

• Backend development
• API integrations
• Custom plugin development

This is a project-based / contract role, with the potential for long-term collaboration on multiple projects.

Key Responsibilities

• Develop, customize and maintain WordPress websites with a focus on backend architecture.
• Implement and manage API integrations (REST, JSON, third-party services, etc.).
• Develop, extend and maintain custom WordPress plugins to meet project-specific needs.
• Customize themes and templates beyond the standard options (functions.php, custom post types, taxonomies, hooks, filters, etc.).
• Ensure performance optimization (caching, queries, assets, Core Web Vitals) and security best practices.
• Work closely with our UX/UI design team to translate design systems and layouts into pixel-perfect, responsive WordPress implementations.
• Debug and resolve complex backend issues in staging and production environments.
• Integrate and configure third-party tools (e.g. marketing tools, CRMs, analytics, form services, payment gateways where relevant).
• Document technical solutions clearly for internal teams and future maintenance.

Requirements

• Strong experience in WordPress backend development (please indicate years of experience).
• Proven experience with API integration within WordPress (REST APIs, webhooks, JSON, OAuth, etc.).
• Proven experience in custom plugin development (not only modifying existing plugins).
• Solid knowledge of PHP, MySQL, and WordPress core architecture.
• Familiarity with WordPress hooks, filters, actions and custom post types.
• Experience working with Git or other version control systems.
• Ability to read and implement from Figma / design files with high attention to detail.
• Good understanding of security, performance optimization and best practices for WordPress.
• Comfortable working remotely and communicating asynchronously with an international team.
• Professional working proficiency in English (written and spoken).

Nice to Have

• Experience with WooCommerce or other e-commerce setups.
• Experience with headless WordPress (e.g. WP as a CMS with React, Next.js, etc.).
• Knowledge of ACF (Advanced Custom Fields) or similar tools.
• Experience with multilingual sites (WPML, Polylang or similar).
• Familiarity with CI/CD workflows and modern deployment practices.

What We Offer

• Opportunity to work with an award-winning design agency on high-visibility projects.
• A design-driven environment where quality and details truly matter.
• Flexible, project-based collaboration with potential for ongoing work.
• A professional, collaborative team that values clear communication and responsibility.

How to Apply

If this sounds like you, please apply with:

• Your CV or LinkedIn profile
• A link to your portfolio / GitHub / Bitbucket (or similar)
• 3–5 WordPress projects you are most proud of (with a brief note on your role and responsibilities)
• Your typical project rate or hourly rate
• Your availability (time zone, weekly hours you can dedicate, and earliest possible start date)

We look forward to building great digital experiences together.

Job Type: Contract

Pay: From 450.00TRY per hour

Expected hours: No less than 10 per week

Application Question(s):

• Do you have at least 3 years of professional experience in WordPress backend development?
• Have you developed at least one custom WordPress plugin from scratch for a real client project?
• Have you implemented REST or JSON API integrations (e.g. third-party services, CRMs, payment providers) in WordPress projects?
• Are you comfortable working with custom post types, custom taxonomies, hooks, actions and filters in WordPress?
• Do you have strong working knowledge of PHP and MySQL as they relate to WordPress development?
• Have you previously been responsible for optimizing performance and security of WordPress sites before launch?
• Do you regularly use Git or another version control system in your development workflow?
• Have you worked on projects where you had to convert Figma/Sketch/XD designs into pixel-perfect, responsive WordPress layouts?
• Have you been the person responsible for debugging and fixing complex backend issues on WordPress projects?
• Are you available to work on a remote, project-based / contract basis?
• Can you start within the next 4 weeks if we decide to work together?
• Have you worked on at least one WooCommerce or other WordPress e-commerce project?
• Have you ever used WordPress as a headless CMS (e.g. with React, Next.js, or similar frameworks)?
• Are you familiar with ACF (Advanced Custom Fields) or a similar custom fields framework in WordPress?