Juan I.

Full Stack Engineer

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Bio

Juan Jacobo Izquierdo Becerra is a Frontend and Fullstack Developer with several years of experience building web applications with React and TypeScript. He builds with React.js, Next.js, TypeScript, Redux, and Express.js, working across REST APIs and relational databases including MariaDB and PostgreSQL. His practice includes unit and integration testing with Vitest and Jest, dependency modernization such as migrating projects from Create React App to Vite, and deployment on AWS using Docker-compose, EC2, and S3. At…

  • Projects completed4
  • Hourly rate
  • 3-4 years experience
  • Bogotá, Bogotá D.C., Distrito Capital, COL
  • Member since Jul 2026
Industries
Enterprise & SaaSEdTech
Expertise
ReactTypescriptJavascriptNextJSAWSSQLPythonGitHTMLCSSFlutterMongoDB
Video Intro
Assessments

General Project Assessment

Great on Find the Length of the Longest Substring Without Repeating Characters, Difficulty Easy · Great on Optimize Product Page Load Time, Difficulty Medium · Great on Sharing Authenticated User Data Across the App, Difficulty Medium

Projects

UNfavor

Developed an app called UNfavor that connects users who want to exchange favors using a recommendation system. Built on React.js, Redux, mongoDB, and Express.js.

GWhats

Developed an app to remaster the Gmail UI to work like Whatsapp. Built on React.js and uses Google APIs.

Portfolio

Development of a portfolio using only pure javascript, css, and html to understand the problems of not using a modern frontend framework.

EVoting

Developed a mobile electronic voting application for the university to learn more about Flutter, Dart, and mobile development.

Experience

  1. Frontend Developer

    Rondhuit· Enterprise & SaaSAug 2024 — Feb 2026
    • Developed custom features based on client requests using React.js and Typescript
    • Wrote unit and integration tests using Vitest, React Testing Library + Jest, and Vitest + browser mode
    • Managed project dependency upgrades and performance optimization
    React.jsTypescriptVitestReact Testing LibraryJestCreate React AppViteReact RouterReact HooksCSS3

  2. Fullstack Developer

    National University of Colombia· EdTechFeb 2021 — Aug 2024
    • Designed and implemented web applications using React.js/Next.js, Typescript, Redux, Express.js, Django API Rest, MariaDB, and Postgresql
    • Managed maintenance of a reporting system for over 7,100 students
    • Maintained architecture on AWS with Docker-compose, EC2, S3, Nginx
    React.jsNext.jsTypescriptReduxExpress.jsDjango API RestMariaDBPostgresqlAWSDocker-composeEC2S3NginxPythonCSS3

  3. Frontend Developer

    Code LabsAug 2019 — Aug 2020
    • Translated UI designer's designs into web layouts using various technologies
    • Performed quality assurance checks on company websites
    • Collaborated with UI designers to optimize web layouts
    JavascriptJqueryHTMLCSSSASSgulpbabel
Education

  1. Computer Science - Exchange program

    Hiroshima UniversityHiroshima, Japan2025 — 2026

  2. Computer Science - Exchange program - GPA (A)

    Waseda UniversityTokyo, Japan2024 — 2025

  3. Computer Science and Engineering

    National University of ColombiaBogotá, Colombia2020 — 2024

  4. Systems and Computing Engineering - Exchange Program - GPA (4.5/5.0)

    Los Andes UniversityBogotá, Colombia2023 — 2023

  5. Software Programming Technician - GPA (4.5/5.0)

    SENABogotá, Colombia2019 — 2020
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