Job Summary: We are seeking a Senior Engineer (React Native / Node.js) to develop and maintain robust and scalable mobile applications, creating innovative solutions that will impact users. Key Highlights: 1. Team that values innovation, collaboration, and technological excellence. 2. Develop and maintain robust and scalable mobile applications using React Native. 3. Design and evolve backend APIs and services in Node.js with a focus on security. At NIO, we believe technology connects people and transforms the future. We are an innovative company focused on excellence, operating with a dynamic and collaborative culture. Our team works autonomously, passionately, and committedly, always striving for the best results. We are looking for a Senior Engineer (React Native / Node.js) to join our team. You will be responsible for developing and maintaining robust and scalable mobile applications, ensuring high performance and usability. Your expertise in React Native and Node.js will be essential to create innovative solutions that directly impact our users and the company’s success. Join a team that values innovation, collaboration, and continuous pursuit of technological excellence. **Responsibilities and Duties** * Develop and maintain robust and scalable mobile applications using React Native. * Design and evolve backend APIs and services in Node.js with a focus on security and efficiency. * Optimize application performance using Redis for caching and queues. * Model and manage data in MongoDB, ensuring scalability. * Implement integrations with external systems via REST APIs and WebSockets. **Requirements and Qualifications** * Solid experience in mobile development with React Native (Android and iOS). * Advanced experience in Node.js (Express, NestJS, or similar frameworks). * Proficiency in NoSQL databases (MongoDB) and Redis. * Experience with microservices architecture and real-time messaging. * Knowledge of CI/CD (GitLab, GitHub Actions, ArgoCD, or similar tools). * Experience with cloud platforms (AWS, GCP, or Azure). * Ability to write clean, reusable, and scalable code. * Experience with monitoring and observability (Prometheus, Grafana, Loki, etc.) is a plus. * Interest in full-stack work, understanding the entire application flow (frontend, backend, and data). * Technical English for reading documentation. * Bachelor’s degree in Computer Science, Software Engineering, or related fields. **Additional Information** Benefits: * Meal Allowance and/or Food Voucher * Transportation Voucher * Health Insurance * Dental Insurance * Life Insurance * Private Pension Plan * Profit-Sharing Program (PPR) * Pharmacy Allowance * Daycare Allowance * Flexible Working Hours * V.tal Benefits Club * Extended Maternity Leave (6 months) * Extended Paternity Leave (20 days) **THE FUTURE STARTS HERE — AND WE’LL BUILD IT WITH YOU** ---------------------------------------------------------------- **We are V.tal, a company born with the purpose of enabling connection to the digital world and transforming people’s lives.** We work to help position Brazil among the most digitally advanced countries worldwide, promoting digital inclusion, boosting new businesses, and stimulating regional development. This is possible because we launched with Brazil’s largest fiber-optic network and a team that makes things happen. We are a neutral, shared network, open to telecom operators, ISPs, and partners of all sizes and regions. This fills us with pride. Our robust infrastructure enables us to offer extensive coverage and reach, empowering our customers to go further while optimizing their investments. **OUR TEAM** We are connected, agile, and driven by outstanding results. Our workplace is light-hearted because it is built by people who collaborate, trust one another, and celebrate every achievement. Here, we don’t make excuses—we find solutions. With this high-performance team, we work daily to position Brazil among the most digitally advanced countries worldwide, promoting digital inclusion, economic development, and social progress. **OUR CORE PRINCIPLES** **We play fair and trust each other.** **Continuous evolution and learning is our mantra. Without learning, there is no evolution.** **We are obsessed with excellence and high performance. The pursuit of results happens daily in every decision.** **Work hard, play hard! We’re focused and foster a healthy work environment.** **DO YOU IDENTIFY WITH OUR PROPOSAL? THEN JOIN US TODAY TO BUILD THE FUTURE!** Remember that internet that simply works—connecting you to what truly matters, without unpleasant surprises? We know the telecommunications market needs to change. And we’re here to make it happen. We are **Nio**, a technology company offering fiber-optic internet solutions for homes and businesses across Brazil. We already serve **approximately 4 million customers**, and this is just the beginning. **Why does Nio exist?** **Our mission:** To drive the evolution of people and businesses through technology. **Our essence:** We look at people—and look ahead. Because we believe innovation only makes sense when it improves people’s lives. And this applies not only to our customers but also to those who make it all happen: **the people who work here.** **Working at Nio means…** Being part of a company that puts the customer at the center of everything. Having autonomy and room to grow. Working alongside people who believe in what they do. Building something new, in a collaborative and energetic environment. **We’re just getting started—and you can be part of this transformation. Join Nio and help create Brazil’s new digital era!**