Senior WordPress Developer

Senior WordPress Developer needed for our FMCG client in Glasgow for an initial 6-month contract. The right candidate must have extensive demonstrable experience in WordPress & PHP with deep knowledge of the WordPress core engine, strong API integration expertise, and a proven ability to deliver secure, scalable, and high-performance solutions.

This role is Outside IR35 and the majority of the time can be worked remotely, though there is a requirement for a minimum of two onsite visits per month to Glasgow for workshops.

Responsibilities will include developing, maintaining & optimising custom themes, plugins & features using modern, scalable, secure WordPress practices and designing & implementing integrations between WordPress and external systems using REST APIs, webhooks, SDKs, and middleware. The right candidate must be a self-starter who can independently run WordPress audits, optimise performance and work closely with business stakeholders to prioritise changes aligned to business needs.

Key Experience required:

• Proven track record as a WordPress Developer, including running WordPress audits and optimising performance.
• In-depth knowledge of WordPress core, including theme and plugin development.
• Strong experience with PHP, JavaScript, HTML5, CSS3, MySQL, and modern development tooling.
• Proven experience working with WP Engine or similar enterprise WordPress hosting platforms.
• Hands-on experience with integrations using REST APIs, JSON, OAuth, JWT, and secure authentication flows.
• Experience implementing or maintaining payment integrations, ideally including Stripe, GoCardless, Apple Pay / Google Pay.
• Strong understanding of security best practices.
• Familiarity with Git workflows, CI/CD pipelines, and local dev environments.
• Demonstrated ability to assess a WordPress estate and identify optimisation opportunities.
• Excellent problem-solving skills and attention to detail.
• Ability to work collaboratively with technical and non-technical stakeholders.
• Strong organisational skills, ability to prioritise effectively, and comfortable managing multiple tasks.
• Flexible, adaptable, and proactive in improving products and processes.