Rhuan Santos
Senior Frontend Engineer / Senior Software Engineer
React, TypeScript
Professional Summary
Senior Frontend Engineer with 13+ years of experience designing and building large-scale, high-traffic web applications for enterprise and consumer platforms. Expert in React, TypeScript, Redux, Next.js, and frontend architecture, including component libraries, design systems, micro-frontends, performance optimization, and accessibility (WCAG 2.1 / ADA). Strong experience collaborating in remote-first, distributed teams, working asynchronously, and owning features end-to-end from design through production. Proven track record delivering mission-critical e-commerce systems impacting millions of users and billions in annual revenue.
Core Skills
Frontend
Architecture
Quality & Performance
Backend
Cloud & Tooling
Collaboration
Professional Experience
Walmart Global Tech
Senior Software Engineer
- Core contributor to samsclub.com Checkout & Payments platform supporting millions of users and approximately $60B in annual revenue.
- Designed and maintained scalable, reusable React and Redux components for Checkout, Payments, and Address Book flows.
- Improved performance, reliability, and accessibility across critical purchase paths.
- Collaborated with Product, UX, and Analytics teams to run A/B experiments and optimize conversion rates.
- Contributed to internal Design Language System (DLS) and shared component libraries.
- Led code quality initiatives through CI/CD pipelines, testing strategies, and pull request reviews.
- Mentored junior and mid-level engineers, promoting best practices in frontend architecture.
Florida Blue
UI Tech Lead
- Led frontend architecture for Content Connect, an enterprise platform managing over 500 million documents.
- First React and JavaScript engineer within ECMS, defining coding standards, libraries, and architectural patterns.
- Built high-performance, multithreaded user interfaces using Web Workers.
- Developed reusable React component libraries adopted across multiple teams.
- Designed and implemented REST APIs using Node.js and Express.
- Authored architectural design documents and system diagrams.
Adopets
Senior Software Engineer
- Built responsive web platforms using React, Redux, Node.js, and Express.
- Created initial mobile application concepts using React Native, Swift, and Java.
- Collaborated on AWS infrastructure design using EC2, RDS, S3, and Elastic Load Balancing.
Megafoto
Frontend Developer
- Developed interactive digital experiences for a platform with over 6 million users.
- Built the main Megafoto Player using JavaScript and the Krpano plugin.
- Created reusable HTML5 and Sass templates using BEM methodology.
- Modernized legacy systems by migrating from PHP to Node.js.
Redzero
Full Stack Developer
- Developed and maintained the main website serving over 15,000 students across 15 locations nationwide.
- Led a full responsive redesign using HTML5 and CSS3.
- Worked across PHP, JavaScript, Jekyll, Ruby on Rails, and Grunt.
- Captured business requirements, produced wireframes, and coordinated with design teams.
- Ensured ADA compliance and cross-browser compatibility.
Education
Full Sail University
Bachelor of Science, Web Development & Design
Full Sail University
English as a Second Language
Languages
Interested in working together?