This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a QA Engineer based in Brazil. Join a remote, international team as a QA Engineer and help improve the reliability and performance of AI-driven systems. In this role, you will design and execute structured tests, assess model outputs, and identify opportunities to improve accuracy and data quality. You will contribute to the development of testing methods tailored to artificial intelligence applications while ensuring that results are carefully documented and actionable. Working with cross-functional teams, you will help clarify requirements, communicate findings, and support continuous improvement. This opportunity is ideal for a quality assurance professional who combines strong testing fundamentals with analytical thinking and a keen eye for detail.