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I'm a Senior React Developer with over a decade of experience in building scalable web applications. I love tackling complex problems and delivering user-centric solutions. My background in Physics helps me approach challenges with a unique analytical perspective, and I'm always eager to learn and improve my skills.…

Ruy Guerra

Web Developer, Front-End Developer, Full Stack Developer, +1

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I'm a Senior React Developer with over a decade of experience in building scalable web applications. I love tackling complex problems and delivering user-centric solutions. My background in Physics helps me approach challenges with a unique analytical perspective, and I'm always eager to learn and improve my skills.…

Available to hire

I’m a Senior React Developer with over a decade of experience in building scalable web applications. I love tackling complex problems and delivering user-centric solutions. My background in Physics helps me approach challenges with a unique analytical perspective, and I’m always eager to learn and improve my skills.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

Portuguese

Fluent

English

Advanced

Work Experience

Senior Software Engineer – React Specialist at Chegg

September 1, 2023 - Present

Led the design and development of AI-powered assessment interfaces, promoted code quality and best practices, refactored legacy code to streamline the codebase, and contributed to modernizing the tech stack to improve reliability and performance. Collaborated closely with cross-functional teams to align technical work with business goals and enhance the learning experience for millions of students.

Software Engineer - React Developer (Remote) at Help Lightning

September 1, 2020 - August 1, 2023

Contributed to the web version of an AR platform by implementing new features, improving user engagement and overall functionality. Performed thorough code reviews, mentored junior developers, and participated in Scrum ceremonies to ensure smooth project execution and high-quality deliverables.

Software Engineer - React Developer (Remote) at AVATRIA

April 1, 2019 - September 1, 2020

Delivered two major features—Accessories and Staggered Wheels—that significantly expanded the e-commerce platform’s capabilities. Improved user experience and broadened product offerings, contributing to higher customer satisfaction and sales.

S2 System Project – Architect & Developer at RSP Tecnologia Do Brasil

January 1, 2003 - April 1, 2019

Led architecture and development of the S2 System, handling requirements analysis, system design, service planning, and technology selection. Built a responsive, interactive web application with React, Redux, Router, Axios, and Material-UI; developed back-end services with Node.js and Express, Socket.IO, REST APIs, and MongoDB. Created T-SQL stored procedures, functions, triggers, views, and indexes to implement core business logic, and designed the S2 Safety System as a robust RI A with significant business impact.

Senior Software Engineer (React) at Chegg

September 1, 2023 - Present

Contribute to one of the world’s leading education platforms serving millions of students globally, focusing on AI-powered assessment interfaces and improving usability.

Senior Software Engineer (React) at Help Lightning

September 1, 2020 - August 31, 2023

Built enterprise AR support solutions enabling real-time remote assistance, increasing platform usability and customer satisfaction.

Software Engineer (React) at Avatria

April 1, 2019 - September 30, 2020

Delivered major e-commerce features for Discount Tire, enhancing user experience and customer engagement.

Senior Software Engineer / Architect at RSP Technology do Brasil

January 1, 2003 - April 30, 2019

Designed and built a full enterprise platform for monitoring fuel station devices, leading system architecture and technology selection.