This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Software Engineer Back End SR based in Brazil. This role offers the opportunity to build and evolve scalable backend solutions within a fast-growing digital health environment.You will design, develop, and optimize services that support reliable, high-quality experiences for millions of users.Working alongside product, QA, frontend, and data teams, you will contribute to end-to-end delivery and technical excellence.The position requires strong backend expertise, architectural thinking, and a passion for building maintainable and efficient systems.You will work with modern technologies, distributed architectures, APIs, and high-volume data environments while helping shape engineering best practices.This is an impactful opportunity for a senior engineer who enjoys solving complex challenges, mentoring teammates, and driving innovation through technology.