Senior Fullstack Developer
Stay22 — Montreal HQ
Posted 2026-09-15
-Version française à suivre- About Stay22 Based in Montreal, Stay22 helps ambitious creators and intent-rich digital platforms turn their existing traffic into incremental revenue, with technology that works quietly in the background. Today, more than 6,500 creators and platforms rely on Stay22, with over $1 billion in annual transactions flowing through the platform. Originally built for travel, the company now supports partners across retail, lifestyle, publishing, events, and transport as it expands its monetization infrastructure for the modern creator economy. About the role As a Senior Fullstack Developer on the Phantom team, you will play a key role in advancing our embedded widget and affiliate platform. Your mission will be to streamline browser execution and ensure high performance of our scripts across diverse websites. You will design mechanisms for privacy-conscious session tracking and fingerprinting, and take ownership of the full script lifecycle – from load optimization to event handling and error recovery. Working closely with product and engineering leads, you will help shape and maintain the core infrastructure that powers Stay22's embeddable products, ensuring