Contract Senior Developer at Critical Mass

Step into a contract role as a Senior Developer with Critical Mass in our Communications team. Your work will focus on pixel-perfect execution and responsive designs for consumer sites.

This position runs from July 1 to September 25, 2026, requiring experience with HTML5, CSS3, and modern development tools. Collaborate with teams to optimize performance while adhering to WCAG accessibility standards. Ensure quality through meticulous coding and knowledge sharing.

Key Responsibilities: • Implement pixel-perfect designs across various devices • Collaborate with Design and UX for seamless execution • Ensure WCAG compliance and optimize page performance • Produce clear documentation to support team efforts • Quickly adapt to high-velocity production cycles

Requirements: • Minimum 5 years’ experience with HTML5, CSS3, and SASS • Strong skills in responsive design and web performance optimization • Proficient in Git and web animation libraries • Excellent troublesh...