This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for an Analista de Sistemas Sr based in Brazil. This opportunity is ideal for a senior systems professional with strong expertise in Mainframe environments who is passionate about maintaining and evolving mission-critical applications. In this role, you will contribute directly to the stability, modernization, and continuous improvement of corporate systems that support key business operations. Working in a collaborative and technology-driven environment, you will partner with multidisciplinary teams to solve complex challenges, ensure operational continuity, and deliver reliable solutions. The position offers exposure to large-scale systems, strategic projects, and an organization that values innovation, technical excellence, and professional growth.