Senior Full Stack Engineer (Node.js / React) (Remote)

We are looking for a Senior Full Stack Engineer to join a lean, product\-focused team building modern web applications from the ground up. This is a hands\-on role with real ownership, where you’ll work across backend and frontend, influence architecture decisions, and help shape scalable, cloud\-native systems used in production. Details Location: Brazil Employment Type: Full\-time Start Date: ASAP Language Requirements: English B2\+ Work Format: Remote Key Responsibilities Design, build, and maintain full\-stack web applications using Node.js and React Develop and consume RESTful APIs within a microservices\-based architecture Participate in system design and architecture decisions from early stages Build new features end\-to\-end, from backend logic to frontend UI Collaborate closely with product, design, and DevOps teams Ensure code quality through reviews, testing, and best engineering practices Deploy and maintain services in cloud environments (AWS/GCP) Take ownership of features in production, including monitoring and support when needed **Requirements** 4\+ years of hands\-on experience in full\-stack web development Strong production experience with Node.js and React Proven experience building applications from scratch in small or mid\-sized teams Hands\-on experience with microservices architecture and REST APIs **Experience Working With Cloud Platforms (AWS Preferred, GCP Acceptable)** Practical experience with Git and CI/CD pipelines Strong problem\-solving skills and a clear ownership mindset English level B2 or higher Nice to Have Experience with React Native or mobile development Experience using TypeScript Background in healthcare, regulated, or data\-intensive products Experience with on\-call rotations or production support