Job Summary: We are looking for a backend developer to join Next Fit, developing and maintaining robust, scalable APIs while collaborating on design, DevOps, and ensuring seamless integration. Key Highlights: 1. Develop and maintain robust, scalable, and high-performance backend APIs and services. 2. Actively contribute to design and product, offering insights and improvements to adopted technologies and practices. 3. Work in an agile environment focused on modern, scalable technologies. Next Fit is the software revolutionizing the fitness industry in Brazil. With over 16,000 clients and a team of more than 200 employees, we are expanding rapidly—and we’re looking for someone who wants to grow with us! What will be your mission? * Develop and maintain robust, scalable, high-performance backend APIs and services. * Actively contribute to design and product, offering insights and improvements to adopted technologies and practices. * Collaborate with the DevOps team to enhance CI/CD processes and improve development pipeline efficiency. * Analyze and resolve performance and scalability issues in backend applications. * Work closely with the frontend team to ensure seamless integration between user interfaces and the backend. * Actively participate in technical discussions and decision-making with other developers. * Write high-quality code, adhering to best programming practices. * Build and maintain robust, scalable applications supporting continuous growth in cloud environments. Desired Technologies and Knowledge We seek someone with solid backend development experience and exposure to modern, scalable technologies. Our current tech stack includes: * Languages and frameworks: C#, .NET Core 6 and 8, .NET Framework * Messaging and databases: RabbitMQ, Redis, PostgreSQL, MongoDB * Infrastructure and DevOps: Azure DevOps, Docker, Kubernetes, ArgoCD, Rancher, CI/CD, AWS * Monitoring and observability: AppInsights, Grafana * Frontend (occasional interaction): AngularJS, React, React Native If you have a strong backend development foundation, experience in agile environments, and are eager to grow with us, we’d love to meet you! Benefits * Meal allowance (R$750.00) * Transportation allowance * Health insurance * Gympass (Wellhub) * Birthday day off * Fruit day * Rest and games room * E-learning platform * In-house library Next Fit is a technology company based in Criciúma, Santa Catarina. For seven years, we’ve been driven by the purpose of empowering fitness and sports business managers to help make our country healthier—and transform lives through sport. Today, we are the **#1 technology provider for fitness and sports businesses in Brazil**. Our ecosystem connects every step of the journey: from enrollment at the front desk to workouts accessed via mobile, from automated payments to reports guiding the next business move. Over 16,000 businesses and 2 million students experience this daily. #### **WHAT IT MEANS TO BE A ROXINHO** If Next Fit has grown so much in such a short time, it’s because a legion of people transforms ideas into technology, challenges into solutions, and goals into achievements. We affectionately call these people **roxinhos**. Here, learning and improvement are not optional. Our pace is fast, our standards are high, and knowledge sharing is part of everyday life. If this environment doesn’t resonate with you, perhaps it’s best to stop here. But if it makes your eyes light up—you may just be in the right place. Being a roxinho means having autonomy to create, responsibility to deliver, and pride in seeing your work impact thousands of businesses and millions of students.