Gonzalo Chumillas

Front-end developer with 6+ years of experience building React applications and solid back-end knowledge. I'm currently looking to join startup teams building innovative software applications.

React Developer — HYVE (Jul 2024 – Jun 2025)

• Contributed to a distributed SCRUM team on an international project
• Maintained and implemented new features in React-based apps
• Modernized legacy codebases to improve maintainability and performance

• Developed two React applications from scratch using TypeScript and TailwindCSS
• Built a reusable component library with Storybook and TypeScript
• Mentored two junior developers

• Delivered multiple web applications for startups using React, Next.js, Express, and RESTful APIs
• Developed UI libraries and implemented with Jest and Cypress
• Designed and deployed scalable backend services using Node.js and Express

• Developed enterprise-grade features within a SCRUM team
• Worked on a React + TypeScript + Redux app for whistleblowing channel

• Led development of web applications and CMS solutions using PHP, MySQL, and JavaScript
• Delivered interactive Flash applications with ActionScript (pre-HTML5 era)

Education

Mathematics (4 years completed) – University of Seville

Courses

• UX Design Fundamentals (Coursera)
• Information Architecture (Coursera)
• User Interface Design (Coursera)