Kauã User

I'm a Full Stack Developer with over 3 years of experience building and evolving digital products end to end, with my core strength in frontend and mobile development.

I specialize in building modern, responsive and scalable interfaces with React, Next.js and TypeScript, and in developing cross-platform mobile apps with React Native, including the full lifecycle from development to publishing and maintaining apps on the Google Play Store and the App Store. I work extensively with React Hooks, component-driven architecture, reusable component libraries and state management (Redux, Zustand, Context API), always focused on clean, maintainable code and a great user experience.

Being full stack gives me an integrated view of the whole solution. On the backend, I have built robust and secure RESTful APIs in C# / .NET Core with more than 30 entities, using Entity Framework Core, authentication and authorization, and applying SOLID and Clean Architecture. I also have experience with Node.js and PHP / Laravel, and I work comfortably with relational and non-relational databases (SQL Server, PostgreSQL, MySQL, MariaDB, MongoDB). This backend depth makes me a stronger frontend developer, because I understand exactly how the interface connects to APIs, data and business logic.

I care a lot about code quality, writing unit and integration tests with Jest, Vitest and Playwright on the frontend and xUnit on the backend. I started out contributing to open source and ERP systems, including 400+ hours of open source work, which gave me a strong foundation in maintaining and refactoring real production codebases. Today I work on a SaaS platform, contributing actively to technical decisions, architecture and continuous improvement.

I'm based in Brazil, fluent in English (C2), and comfortable working with distributed, multidisciplinary teams. I value clear communication, autonomy and investigating a problem thoroughly before implementing. I'm currently looking for remote opportunities where I can keep growing as a frontend-focused full stack engineer and contribute to products that make a real impact.