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 with autonomy, passion, and commitment, always striving for the best results. We are looking for a Senior Developer (React Native / Node.js) to join our team and work on developing robust and scalable mobile applications. You will have the opportunity to work in a dynamic environment, using cutting-edge technologies to create innovative solutions that will directly impact our users. Your expertise will be essential in ensuring high performance, usability, and security of our platforms, contributing to the success of our products and the growth of the company. **Responsibilities and duties** * Develop and maintain robust and scalable mobile applications in React Native, ensuring high performance and usability. * Create and evolve backend APIs and services in Node.js, focusing on security, efficiency, and sound architectural practices. * Use Redis for caching, queues, and real-time performance optimization. * Model and manage data in MongoDB, including complex queries, indexes, and 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). * Mastery of NoSQL databases (MongoDB) and Redis. * Experience with microservices architecture and real-time messaging. * Knowledge of CI/CD (GitLab, GitHub Actions, ArgoCD, or similar). * 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 working full\-stack, 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. * Certifications in React Native, Node.js, or cloud platforms (AWS, GCP, Azure) are a plus. **Additional information** Benefits: * Meal and/or food allowance * Transportation allowance * Medical insurance * Dental insurance * Life insurance * Private pension plan * Profit-sharing program (PPR) * Pharmacy subsidy * Childcare assistance * Flexible working hours * V.tal Benefits Club * Extended maternity leave (6 months) * Extended paternity leave (20 days) **THE FUTURE PASSES HERE AND IT'S WITH YOU THAT WE WILL BUILD IT** ---------------------------------------------------------------- **We are V.tal, a company born with the purpose of enabling connection to the digital world, transforming people's lives.** We work to help position Brazil at the top of the list of the most digitally advanced countries, promoting digital inclusion, boosting new businesses, and stimulating regional development. And this is possible because we were born with Brazil's largest fiber optic network and a team that makes things happen. We are a neutral network, shared with operators, providers, and partners of all sizes and regions. And this fills us with pride. All this robustness allows us to offer reach and capillarity so our customers can go further, optimizing their investments. **OUR TEAM** We are connected, agile, and driven by excellent results. Our work environment is light because it's made up of people who collaborate with each other, trust one another, and celebrate every achievement. Here, we don't make excuses—we seek solutions. It is with this high-performance team that we work daily to include Brazil among the most digitally advanced nations, promoting digital inclusion, and economic and social development for people. **CHECK OUT OUR CORE PRINCIPLES** **We play fair and trust each other.** **Evolution and constant 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 are focused and have a healthy environment.** **DO YOU IDENTIFY WITH OUR PROPOSAL? THEN COME BUILD THE FUTURE WITH US TODAY!** Know that internet that just works? That connects you to what really 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 internet solutions for homes and businesses across Brazil. Already **around 4 million customers** connected—and this is just the beginning. **Why does Nio exist?** **Our mission:** Accelerate the evolution of people and businesses through technology. **Our essence:** We look after people. And we 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 the people 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 space to grow. Working with 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. Come to Nio and help create Brazil's new digital era!**