Senior WordPress Developer (Backend)

About Flatiron Software Co.

Flatiron is a fully remote, US-based software company delivering high-impact, modern digital experiences. We work with mission-driven organizations, media groups, and product teams to build scalable, accessible, and performant web platforms. We're currently seeking full-stack developers to join our engineering team, with a strong emphasis on deep WordPress and modern JavaScript experience.

About the Role

We’re looking for a highly skilled WordPress Developer to join our global engineering team. This position focuses on backend development — building and optimizing custom WordPress plugins, APIs, and integrations for large-scale, high-performance websites.

The ideal candidate has deep knowledge of WordPress internals, experience working with enterprise clients, and a strong understanding of scalable, maintainable code.

Responsibilities

• Design and develop custom WordPress plugins and themes from scratch using PHP, MySQL, and modern best practices.
• Implement advanced custom fields (ACF), custom post types, and taxonomies for structured data management.
• Optimize database queries and improve performance across complex WordPress sites (meta queries, caching, indexing).
• Integrate WordPress with third-party APIs and automation tools.
• Develop and maintain cron jobs, background tasks, and data synchronization scripts.
• Build and maintain Gutenberg blocks or React-based admin components when required.
• Ensure sites meet performance, accessibility, and SEO standards (Lighthouse, Core Web Vitals).
• Collaborate with cross-functional teams (frontend, DevOps, QA, design) following Agile practices.
• Write clean, well-documented, and unit-tested code following OOP principles and WordPress coding standards.

Minimum Qualifications

• 5+ years of professional WordPress development experience, focusing on backend and custom plugin work.
• Strong proficiency in PHP, MySQL, HTML, CSS, and JavaScript.
• Experience with WordPress hooks (actions & filters), custom queries, and optimization strategies.
• Proficient in ACF, CPT UI, Gutenberg.
• Solid understanding of WordPress REST API, webhooks, and API integrations.
• Familiarity with version control (Git) and CI/CD pipelines.
• Experience with performance optimization, caching mechanisms, and scalable WordPress architectures.
• Advanced written and spoken English (international client communication required).

Benefits

- Yearly Office Allowance Budget

- Macbook Purchase Support

- Wellbeing Support

If you think that you are a good fit for the position, please apply through LinkedIn.

Only CVs that are in English will be accepted.

Flatiron Software Co has a zero tolerance to discrimination policy. In this regard, during the course of the evaluation of your job application and during all your employment relation, if any, all discriminatory factors such as race, sex, sexual orientation, social gender definitions/roles, colour, national or social background, ethnicity, religion, age, disablement, political opinion or any status that is protected under law shall be totally disregarded.