Full Stack Developer with 2+ years of experience specializing in Front-end technologies. Proven track record in developing responsive web and mobile applications using React, React Native, and Firebase. Focused on creating dynamic and optimized user interfaces with emphasis on performance and user experience. Demonstrated ability to work in agile environments, delivering scalable and maintainable solutions with modern JavaScript technologies.…

Kevin Barrios

Full Stack Developer with 2+ years of experience specializing in Front-end technologies. Proven track record in developing responsive web and mobile applications using React, React Native, and Firebase. Focused on creating dynamic and optimized user interfaces with emphasis on performance and user experience. Demonstrated ability to work in agile environments, delivering scalable and maintainable solutions with modern JavaScript technologies.…

Available to hire

Full Stack Developer with 2+ years of experience specializing in Front-end technologies. Proven track record in developing responsive web and mobile applications using React, React Native, and Firebase.
Focused on creating dynamic and optimized user interfaces with emphasis on performance and user experience.
Demonstrated ability to work in agile environments, delivering scalable and maintainable solutions with modern JavaScript technologies.

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Skills

Experience Level

React Native
Expert
JavaScript
Expert
TypeScript
Expert
CSS
Expert
HTML5
Expert
Node.js
Expert
API
Expert
Express
Expert
PostgreSQL
Expert
SQL
Expert
Android
Intermediate
UI
Intermediate
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Language

Spanish; Castilian
Fluent
English
Fluent

Work Experience

Mobile App Developer at Personal Cross-Platform Project (Android TV)
March 20, 2025 - Present
Created a cross-platform mobile app using React Native and Expo, optimized for Android TV. Implemented auto-start capabilities and persistence after device boot, designed adaptive navigation supporting touch devices and remotes, and integrated health monitoring for device status.
Mobile App Developer at Personal / Across-Platform Digital Signage App
March 1, 2025 - Present
Developed a cross-platform mobile app using React Native and Expo, optimized for Android TV; implemented advanced multimedia caching to reduce bandwidth in unstable networks; engineered auto-start and persistence features; designed adaptive navigation for touch devices and remote control; built a real-time monitoring system with heartbeat to track device status.
Full Stack Developer at UpperDS Platform
December 20, 2023 - Present
Implemented a template-based content design tool and a real-time content management system with role-based access control; built a responsive web admin dashboard for managing digital signage content via a web interface.
Full Stack Developer at Environmental Non-Profit Platform
June 20, 2023 - Present
Collaborated in an agile team with weekly sprints; contributed to intuitive UI/UX improvements; participated in code reviews and pair programming; presented weekly progress to Product Owner and integrated feedback into the development cycle.
Frontend Developer at NGO - Collaborative Project
June 20, 2023 - Present
Collaborated in an Agile team environment following weekly sprint methodology, contributing to intuitive user interfaces and improved site navigation and engagement.
Full Stack Developer at Soy Henry / Henry Bootcamp
March 20, 2023 - Present
Completed an intensive full-stack development program focusing on frontend and backend technologies; built dynamic and optimized web and mobile apps using React, React Native, Next.js, Node.js, and PostgreSQL; emphasized performance and maintainability.

Education

Full Stack Development Certificate at Soy Henry
January 11, 2030 - December 9, 2025

Qualifications

Full Stack Development Certification
January 11, 2030 - December 9, 2025

Industry Experience

Software & Internet, Media & Entertainment, Non-Profit Organization, Education, Professional Services
    Portfolio OS - Interactive OS Showcase | www.kevinbarrios.dev

    An innovative portfolio website that simulates a complete operating system interface to showcase full-stack development capabilities. Features a fully functional window management system with drag & drop, snap layouts (50/50, 70/30 split screens), 13+ interactive windows including Terminal (40+ commands), Achievement System (52+ achievements with XP levels), File Manager with drag & drop, and more. multilingual (i18n), with strong Google Lighthouse scores (Performance: 86, Accessibility: 94, Best Practices: 92, SEO: 100). Built to demonstrate both technical depth and user engagement design.

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