Senior Front End Developer

Are you a passionate front-end developer who loves building accessible, high-performing digital experiences?

We're looking for an experienced Senior Front End Developer to join our development team and play a key role in delivering websites and digital products that create real social impact.

This is a predominantly hands-on development role (around 70%), where you'll build high-quality front-end solutions while providing leadership and support (around 30%) to a small team of two Front End Developers. You'll mentor the team, champion front-end best practice, and help shape how we deliver exceptional digital experiences for our charity and social enterprise clients.

You'll work closely with designers, strategists, back-end developers, project managers and senior leadership to continuously improve our front-end capability and engineering standards.

What You'll Be Doing:

Front End Development (Approximately 70%)

• Develop accessible, responsive and high-performing websites and digital products.
• Build modern front-end solutions using HTML, CSS and JavaScript.
• Develop and maintain CMS themes and front-end architectures.
• Integrate front-end applications with APIs and third-party services.
• Champion accessibility, progressive enhancement, security and performance best practice.
• Review code and contribute to maintaining high engineering standards.
• Collaborate with designers and back-end developers to deliver outstanding user experiences.
• Contribute to technical discovery, solution design and estimation.

Team Leadership (Approximately 30%)

• Lead, mentor and support a small team of two Front End Developers.
• Foster a collaborative, creative and accountable team culture.
• Conduct regular one-to-ones, coaching and development conversations.
• Establish and monitor team KPIs, ensuring alignment with business goals and taking action where required.

What We're Looking For

We're looking for an experienced front-end developer who enjoys solving technical challenges while helping others succeed.

Essential experience

Extensive experience with:

• HTML
• CSS
• Client-side JavaScript
• CMS platforms and theming
• Accessibility (WCAG)
• Front-end performance optimisation
• Front-end security
• API integrations
• Progressive enhancement

Some experience with:

• Node.js
• TypeScript
• Continuous Integration (CI)

Desirable

• WordPress
• Craft CMS
• Astro.js
• Cloudflare
• Design Systems
• Test Driven Development using Jest or Vitest

You'll also bring:

• Previous experience mentoring or leading front-end developers.
• Strong code review and technical coaching skills.
• Excellent communication and stakeholder management skills.
• Experience working across multiple client projects in an agency or consultancy environment.
• A passion for writing clean, maintainable and scalable code.
• A collaborative approach with a desire to continuously improve both the team and the products you build.

What It's Like to Work Here:

At Reason Digital, we live by our values. We're looking for someone who:

• Gives out good energy
• Takes pride in their craft
• Sees the bigger picture
• Is unafraid to challenge
• Is down to earth

What's In It for You:

• Salary of up to £55,000 per annum (depending on experience)

Ready to Join Us?

If you're excited by strategy with real purpose and want to work in an agency creating meaningful change, we'd love to hear from you.

👉 Apply now and help us make a real difference!

We're committed to creating a fair, inclusive, and accessible recruitment process. If you require any adjustments or support during the application or interview stages, please let us know. We're happy to accommodate your needs to ensure you have the best possible experience.