Job Summary: NIO is seeking a Senior Java Developer to work on the development and evolution of robust, scalable, and highly available backend solutions, contributing to technological innovation and excellence. Key Highlights: 1. Develop and evolve robust backend applications using Java and Spring Boot. 2. Work in complex, business-oriented environments. 3. Collaborate in a dynamic, autonomous, and results-focused environment. 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 Java Developer to join our team and contribute to the development and evolution of robust, scalable, and highly available backend solutions. This professional will play a key role in technical design, ensuring delivery quality and providing technical support to the team. You will have the opportunity to work in complex, business-oriented environments, directly contributing to the success of our projects. Your contribution will be essential to driving innovation and technological excellence within our company. **Responsibilities and Duties** * Develop, maintain, and evolve backend applications using Java and Spring Boot. * Design and implement high-performance, secure RESTful APIs. * Participate in modeling, optimization, and integration with relational and non-relational databases. * Ensure architectural best practices, clean code, automated testing, and observability. * Diagnose and resolve performance, scalability, and concurrency issues. **Requirements and Qualifications** * Solid experience with Java (8\+) and strong expertise in Spring Boot (Spring Data, Spring Security, Spring MVC). * Knowledge of messaging systems (Kafka, RabbitMQ) and experience developing REST APIs. * Advanced knowledge of relational databases (PostgreSQL, Oracle, MySQL) and non-relational databases (MongoDB, Redis). * Experience with JPA / Hibernate, version control (Git), and CI/CD practices. * Hands-on experience with automated testing (JUnit, Mockito), microservices architecture, cloud platforms (AWS, GCP or Azure), Docker, and Kubernetes. * Knowledge of DDD, event-driven architecture, high-availability and mission-critical environments, and medium-to-large-scale applications. * Bachelor’s degree in Computer Science, Software Engineering, or related fields. * Java or Spring Boot certifications are a plus. **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 * Childcare Allowance * Flexible Working Hours * V.tal Benefits Club * Extended Maternity Leave (6 months) * Extended Paternity Leave (20 days) **THE FUTURE STARTS HERE — AND IT’S WITH YOU THAT WE’LL BUILD IT** ---------------------------------------------------------------- **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 top countries in global digitalization, promoting digital inclusion, boosting new businesses, and stimulating regional development. This is possible because we were founded 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. And this fills us with pride. All this robustness enables us to offer broad coverage and reach for our customers to go further, optimizing their investments. **OUR TEAM** We are connected, agile, and driven by outstanding results. Our workplace is light-hearted because it is built on collaboration, mutual trust, and shared celebration of every achievement. Here, we don’t make excuses—we seek solutions. With this high-performance team, we work daily to position Brazil among the top digitally advanced nations, promoting digital inclusion and socioeconomic development. **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 environment.** **DO YOU IDENTIFY WITH OUR PROPOSAL? THEN JOIN US TODAY TO BUILD THE FUTURE!** Do you know that internet connection that simply works—connecting you seamlessly 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 delivering fiber-optic internet solutions for homes and businesses across Brazil. We already connect **approximately 4 million customers**, and this is only the beginning. **Why does Nio exist?** **Our mission:** To accelerate the evolution of individuals and companies 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, 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!**