Senior Web Developer (WordPress)

Senior Web Developer (WordPress)

Location: Belfast, Northern Ireland

ProfileTree is an award-winning web design and digital marketing agency based in Belfast, helping clients generate leads and sales through structured digital strategy, professional web design and engaging digital content.

Due to continued growth, we are looking for an experienced Senior Web Developer (WordPress) to join our Web Development team.

This role is suited to a developer with strong technical experience, excellent problem-solving skills and the confidence to take ownership of complex website projects. You will work closely with our Project Owners, UI/UX Designers and wider digital team to deliver high-quality websites that meet client requirements and support their business objectives.

You will be comfortable in all types of communication, including telephone calls, and enjoy building relationships with clients and colleagues. You will also have the ability to manage competing priorities, make sound technical decisions and maintain high standards across your work.

As a senior member of the web team, you will also contribute to technical decisions, support  developers and help maintain high standards across our web development projects.

Based on the skills you develop, there are excellent opportunities for growth and promotion with us, allowing you to follow a tailored career path that matches your skills and interests.

Key Responsibilities

• Lead the technical planning, development, optimisation and delivery of website projects, using CMS platforms, including WordPress and Shopify, taking ownership of technical decisions and quality. 
• Develop bespoke WordPress themes, plugins and functionality following best practice standards.
• Develop and deliver front-end responsive frameworks, website architecture and back-end functionality, including database and server integration.
• Collaborate with Project Owners and UI/UX Designers to assess requirements, estimate development effort and identify technical risks, taking technical responsibility for delivering effective, user-focused web solutions.
• Manage technical testing, website audits and performance optimisation to maintain quality, security and reliability.
• Lead the troubleshooting, maintenance and upgrading of existing websites, resolving complex technical issues and supporting other developer developers with technical challenges.
• Monitor live website performance and provide ongoing technical support as required.
• Attend client meetings, online and in-person, providing technical guidance, recommendations and solutions.
• Produce clear technical documentation and maintain accurate project records in project management systems.
• Liaise with internal teams and third-party suppliers, taking responsibility for technical coordination and delivery.
• Provide technical guidance, code reviews and mentoring to developers, alongside delivering web development training and mentoring sessions to clients where required.
• Support account growth by identifying new opportunities within existing client portfolios.
• Adhere to internal processes for time tracking, reporting and billing.

Essential Requirements

• Minimum 4 years of experience in a similar web development role, with strong WordPress development experience.
• Advanced knowledge of WordPress, including custom themes, plugins and website functionality.
• Strong proficiency in PHP, HTML, CSS, JavaScript and MySQL.
• Proven ability to take technical ownership of complex website projects, from initial planning through to successful delivery.
• Ability to troubleshoot technical issues and maintain high standards of website performance and quality.
• Experience using AI tools to support web development, with the ability to apply them effectively and identify opportunities to improve development processes and efficiency. 
• Experience supporting or mentoring other developers.
• Willingness and ability to work in the office minimum 2 days per week.
• Passion for excellent customer service.
• Passion for digital and/or marketing.
• Excellent communication and problem-solving skills.
• Strong time management and organisational skills.