Dashboards and admin systems
Interfaces for operations, data, permissions, and business workflows built with React and Next.js.
Discuss this serviceFRONTEND ENGINEER · BRASÍLIA · REMOTE
I’m Matheus Braúna. I turn business rules, real-time data, and legacy systems into clear, reliable web and mobile experiences that teams can evolve with confidence — using React, Next.js, and TypeScript.
Available for remote roles and selected projects.

CURRENTLY
Open to new opportunities
ABOUT ME
I’m a Frontend Engineer with over two years of professional experience across web and mobile applications. I’ve worked on operational platforms, dashboards, real-time experiences, and legacy system modernization.
My core expertise is frontend development with React, Next.js, and TypeScript. I also understand what happens beyond the interface, working with product, design, and backend teams to turn business rules into clear flows and sound technical decisions.
I work in Portuguese and English and am available for remote roles and selected projects.
React, Next.js, TypeScript, and Tailwind CSS for accessible, responsive interfaces that are easier to maintain.
React Native and WebSockets for consistent experiences across devices and live updates.
REST APIs, GraphQL, Node.js, and PostgreSQL to collaborate with backend teams and make better frontend decisions.
Performance, accessibility, component design, and types as part of development—not fixes left for the end.
HOW I CAN HELP
I help companies and product teams build, evolve, and modernize web applications. Each engagement starts with the problem, its constraints, and the outcome the team needs.
Discuss your projectInterfaces for operations, data, permissions, and business workflows built with React and Next.js.
Discuss this serviceA functional first version with a foundation prepared to validate, learn, and evolve.
Discuss this serviceData flows, authentication, loading states, and error handling between frontend and backend.
Discuss this serviceGradual migrations that reduce risk without bringing product development to a halt.
Discuss this serviceInterface bottleneck analysis with prioritized recommendations and high-impact fixes.
Discuss this serviceCase studies showing how I turned product and engineering challenges into interfaces that are clearer, more reliable, and easier to maintain.
Legacy modernization — 2025
Gradual migration from AngularJS to Next.js and TypeScript, introducing reusable components and a more predictable foundation to build and maintain.
Outcome
The incremental strategy allowed modernization to progress alongside product work. New flows began sharing components and clearer contracts, reducing their coupling to the legacy foundation.
Web and mobile product — 2025
Evolution of an auction platform connecting catalog browsing, live bidding, mobile access, and operational tools in one product.
Outcome
The product presents catalog browsing, bidding, and operations as one coherent journey. Live updates remove the need for manual refreshes and keep the event state visible to participants and operators.
Products, responsibilities, and outcomes that shaped my work as a frontend engineer.
Architecting high-concurrency auction platforms where milliseconds matter. I integrate real-time WebSocket data with robust administrative dashboards using Inertia.js, ensuring seamless bidding experiences and complex logistics management.
Spearheaded the modernization of legacy systems for global brands like Havaianas and Kimberly-Clark. I executed a critical migration from AngularJS to Next.js, establishing a scalable component library that drastically reduced load times and standardized the design system.