Front End Developer Jobs UK | Careers at Square Balloon

Company: Square Balloon
Apply for the Front End Developer Jobs UK | Careers at Square Balloon
Location: London
Job Description:

Front End Developer

Full Time

Key Responsibilities

Maintenance

  • Maintain Joomla & WordPress websites on a monthly basis.
  • Backup all websites.
  • Migrate websites to a test server prior to updating.
  • Update all plugins, modules, and components.
  • Update the core.
  • Test that the updates worked.
  • Migrate any data such as contact form data to ensure the live site is synchronised.
  • Migrate back to the live site.
  • Fix any issues that arise during this process.
  • Update PHP versions when necessary.
  • Report anything you can’t fix to your line manager.

Web Design

  • Create websites using a variety of tools, predominantly Joomla.
  • Use the YooTheme builder.
  • Adhere to the CSS 5-1 methodology.
  • Implement the BEM methodology.
  • Write self-documenting code and class names.
  • Assess and implement good design practices.
  • Resize images prior to upload.
  • Determine when to use SVGs.
  • Utilise CSS variables for setting and changing colours.
  • Use Bootstrap and other similar frameworks such as Zurb Foundation and UI Kit.
  • Write minimal CSS when necessary.
  • Develop with Vanilla JS without relying on jQuery.
  • PHP:
  • Understand basic PHP.
  • Read and modify PHP code to change page layouts.
  • Extract PHP variables from arrays or objects.
  • Create Joomla & WordPress overrides.
  • Access the WordPress loop.

Accessibility

  • Understand accessibility, WCAG compliance, and achieving A and AA standards.
  • Recognise the importance of accessibility.

SEO / Google Web Vitals / Google Lighthouse

  • Achieve high scores on Google Lighthouse.
  • Interpret and address Google Lighthouse feedback.
  • Understand technical SEO.
  • Install and configure Google Analytics, Matomo Analytics, Google Tag Manager, and Google Search Console.
  • Interpret and act on Google Search Console feedback.

GDPR

  • Understand and comply with GDPR.

Copyright

  • Recognise when images can and cannot be used.
  • Select and use placeholder images until client sign-off.
  • Work independently and solve problems.
  • Seek help when necessary.
  • Accept and incorporate feedback.
  • Strive to excel in their role.
  • View constructive feedback positively.
  • Communicate effectively in English, both written and verbal.
  • Ask for clarification when needed.
  • Maintain a positive and professional demeanour.
  • Attend client calls and take meeting notes when necessary.
  • Collaborate effectively within a team.
  • Communicate holiday plans in advance.
  • Listen attentively and take responsibility for tasks.

Qualifications and Skills

  • Proven experience as a Front End Developer.
  • Proficiency in Joomla and WordPress.
  • Knowledge of SEO best practices and tools.
  • Familiarity with accessibility standards.
  • Excellent communication and teamwork skills.
  • Strong problem-solving abilities and attention to detail.

Square Balloon is an equal opportunities employer and welcomes applications from all suitably qualified persons regardless of their race, sex, disability, religion/belief, sexual orientation, or age.

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Posted: July 19th, 2026