Full Stack JavaScript/TypeScript Engineer

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Full Stack JavaScript/TypeScript Engineer based in Brazil. Join a Commercial Engineering team working on business-critical digital publishing and advertising platforms. You will contribute to high-traffic production systems where reliability, performance, and maintainability are essential. The role is full stack, with an approximate 70/30 frontend-to-backend focus, centered on browser-level engineering rather than traditional UI or React development. You will work extensively with JavaScript, TypeScript, Node.js, the DOM, and browser APIs. The position combines ongoing platform enhancement with modernization and migration initiatives in a sophisticated technical environment. You’ll collaborate with experienced engineers, take ownership of complex problems, and have opportunities to grow across diverse long-term projects.