Senior Fullstack Engineer, Quality Engineering

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Fullstack Engineer, Quality Engineering based in Brazil. This role focuses on improving software quality through full-stack engineering, test automation, and AI-powered Quality Engineering practices.You will build and evolve comprehensive automation coverage across the testing lifecycle, from unit and service testing through integration and end-to-end validation.The position combines web development, backend engineering, automation frameworks, CI/CD, and quality measurement to support reliable product releases.You’ll work directly with engineering teams to develop test tools, write and test product code, and design systems that are modular and highly testable.The role requires strong problem-solving skills and the ability to navigate complex codebases, ambiguous challenges, and cross-team technical dependencies.Working in a fast-paced remote environment, you’ll collaborate with Product, Engineering, and Quality Engineering teams to continuously improve reliability, efficiency, and operational excellence.