I am a Senior Frontend Engineer from Brasilia, Brazil, with 7+ years of experience building scalable, responsive and high-performance web applications for fintech, education and product teams. I care about clean architecture, semantic HTML, accessibility, technical SEO, SSR/SSG, Core Web Vitals and production-quality delivery.
My favorite part of programming is solving product problems with simple, maintainable interfaces. I enjoy turning design into production-ready React, Next.js, Vue and Nuxt experiences, integrating APIs, improving performance with lazy loading and code splitting, and keeping user flows polished across devices.
Analytics platform for Wild Rift players and teams, built with typed React and Next.js components, authenticated dashboards, Prisma data modeling and performance-focused charts.
Turns competitive match data into dashboard views that are easier to scan, compare and discuss.
Social media application with responsive UI, accessible media sharing, file uploads, Appwrite storage and schema validation for reliable user-generated content.
Demonstrates product-quality frontend flows for posting, uploading and validating user content.
Personal portfolio for a streamer, designed to present brand identity, content channels and social links through a responsive, polished Next.js experience.
Converts creator identity into a lightweight, responsive web presence focused on discovery.
Modern storefront case study focused on reusable product UI, responsive interactions, clean component composition and consistent shopping flows.
Shows component thinking across product discovery, visual hierarchy and shopping interactions.
Rental marketplace prototype using the Next.js ecosystem, typed data access, schema validation and responsive property discovery flows.
Models marketplace flows with typed data access, validation and responsive discovery patterns.
Brazil
Builds and evolves user-facing interfaces with React, TypeScript and Vue/Nuxt ecosystem practices, creating reusable components, scalable UI architecture, SEO improvements, performance optimization, lazy loading, responsive behavior, API integrations and production-focused reviews.
Brazil
Developed and maintained scalable React, Next.js and TypeScript components for fintech operations and dashboards, integrating REST APIs with TanStack Query and Axios while improving load time, reliability, responsive UI and component architecture.
Brazil
Built internal web tools for tracking student progress and reviewed JavaScript, React, HTML and CSS learning content for accuracy, clarity, accessibility-aware frontend practices and developer-facing technical quality.
Brazil
Reviewed 100+ student projects in HTML, CSS, JavaScript and React, mentoring developers on maintainability, debugging, responsive design, semantic markup and frontend best practices.
Brazil
Won 2nd place in the Brasilia edition, applying product thinking, teamwork, problem solving and rapid prototyping to deliver a technical solution under hackathon constraints.
Brazil
Completed Full-Stack Development through Rocketseat Omnistack Week, React Native through Rocketseat and React + Redux training through Udemy.
Centro Universitario UDF, Brasilia, DF
Completed a Bachelor's Degree in Systems Analysis and Development, strengthening software engineering fundamentals, systems thinking and product-oriented development.
Want to discuss frontend engineering, product work or an opportunity? Email me directly or connect with me on LinkedIn.
railsonsantiago123@outlook.com
