Senior Developer

The Critical Mass technology team is looking for an inspired, motivated, and experienced Senior Developer to join our Communications team for a contract engagement. We are an experience design agency with a focus on the customer, which means that collaboration and precision execution are at the heart of our process. You'll be working on high-visibility campaign and consumer-facing websites where pixel-perfect design execution and responsive optimization are critical to delivering a premium user experience.

PLEASE NOTE – This is a contract position from July 1 – September 25, 2026

You Will

Deliver pixel-perfect front-end implementations that match design comps across all devices and viewport sizes

Work on individual components and page sections within robust, complex websites

Collaborate with Design, UX, and the delivery team to ensure seamless implementation of designs

Optimize page performance and ensure WCAG accessibility complian...