Senior Developer at Critical Mass

Position: Contract Senior Developer at Critical Mass
Become a pivotal part of Critical Mass as a Contract Senior Developer focusing on the Communications team. Your expertise will shape high-quality, consumer-facing websites with pixel-perfect precision.

This temporary role spans from July 1 to September 25, 2026, where you will utilize your 5+ years of HTML, CSS, and JavaScript experience. You will collaborate with design and delivery teams, ensuring responsive layouts and optimized performance to deliver exceptional user experiences.

Key Responsibilities:

• Implement designs accurately across various devices

• Build modern marketing pages featuring rich animations

• Work within complex website components

• Ensure code meets WCAG accessibility standards

• Contribute to the team through clear documentation

Requirements:

• 4+ years of Vanilla JavaScript experience

• 5+ years in front-end development with HTML5 and CSS3

• Strong skills in responsive design and troubleshooting

• Proficiency with Git and performance optimization

• Effective communication and teamwork abilities

Contribute to innovative projects and enhance your development career at Critical Mass.
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