[Job - 27972] Mid-level Fullstack Developer (React + .NET), Brazil at CI&T

We are tech transformation specialists, uniting human expertise with AI to create scalable tech solutions. With over 8,000 CI&Ters around the world, we’ve built partnerships with more than 1,000 clients during our 30 years of history. Artificial Intelligence is our reality. We are looking for a Mid-Level Full Stack Developer with solid experience in React and .NET to help design, build, and maintain scalable, high-quality web applications. You will work across the entire stack, from modern frontend interfaces to robust backend services, collaborating closely with product, design, and other engineering teams. Responsibilities: - Design, develop, and maintain full stack web applications using React, TypeScript, C#, and .NET (preferably .NET Core/.NET 6+) - Implement responsive and accessible user interfaces, following best practices in UI/UX and WCAG/ARIA standards - Build and maintain reusable frontend components and UI libraries for multiple business applications - Design and implement RESTful APIs, ensuring performance, scalability, and security - Contribute to the architecture of microservices and scalable backend systems - Write and maintain automated tests (unit, integration, API, and end-to-end) using tools such as Jest, React Testing Library, Playwright, and .NET testing frameworks - Collaborate with DevOps to configure and maintain CI/CD pipelines (preferably in Azure DevOps) - Work with cloud services (preferably Azure) for deployment, monitoring, and troubleshooting - Participate in code reviews, provide constructive feedback, and help maintain high engineering standards - Diagnose and resolve complex technical issues across the stack, optimizing performance and reliability Requirements: - Strong experience with React and TypeScript in modern frontend development - Experience building and maintaining reusable component libraries and working with tools such as Storybook - Solid understanding of JavaScript fundamentals and modern ES6+ features and patterns - Experience with .NET (preferably .NET Core/.NET 6+) and C# for backend development - Experience designing and consuming RESTful APIs - Understanding of microservices architecture and scalable backend design - Experience with automated testing on both frontend and backend (unit tests, API tests, integration and/or E2E) - Experience with relational databases and database design concepts - Familiarity with cloud platforms (preferably Microsoft Azure) and cloud-native development practices - Experience with CI/CD concepts and pipelines, ideally using Azure DevOps and YAML - Strong problem-solving skills, attention to detail, and ability to work collaboratively in a cross-functional team - Good communication skills in English (written and spoken) Nice to Have: - Experience with microfrontend architectures and modular frontend design - Experience with UI frameworks and styling libraries such as Chakra UI - Experience with Vite or other modern build tools and bundlers - Experience with Capacitor or similar tools for cross-platform development - Knowledge of Clean Architecture and SOLID principles in both frontend and backend contexts - Experience with monitoring, logging, and observability tools in production environments At CI&T, we are driven by Collaboration, Innovation, and Transformation. Join us to be part of a vibrant team that leverages cutting-edge technologies, including AI, to create impactful solutions. We believe in fostering a culture of learning and growth, where your expertise can shine and make a difference. If you're ready to take your career to the next level, we encourage you to apply! Our benefits: -Health and dental insurance -Meal and food allowance -Childcare assistance -Extended paternity leave -Partnership with gyms and health and wellness professionals via Wellhub (Gympass) TotalPass; -Profit Sharing and Results Participation (PLR); -Life insurance -Continuous learning platform (CI&T University); -Discount club -Free online platform dedicated to physical, mental, and overall well-being -Pregnancy and responsible parenting course -Partnerships with online learning platforms -Language learning platform And many more! More details about our benefits here: [Upgrade to PRO to see link] At CI&T, inclusion starts at the first contact. If you are a person with a disability, it is important to present your assessment during the selection process. See which data needs to be included in the report by clicking here.This way, we can ensure the support and accommodations that you deserve. If you do not yet have the assessment, don't worry: we can support you in obtaining it. We have a dedicated Health and Well-being team, inclusion specialists, and affinity groups who will be with you at every stage. Count on us to make this journey side by side.