I'm a seasoned frontend developer with 15+ years of experience crafting responsive, user-centric web applications. I specialize in React.js and modern JavaScript ecosystems, and I bring a versatile full-stack background that spans WordPress, PHP, Node.js, and mobile with Ionic/Capacitor. I thrive on solving complex UX challenges and shipping high-quality, accessible products. I am passionate about leveraging AI responsibly to boost productivity, improve code quality, and earn user trust. I enjoy collaborating with cross-functional teams and continuously learning new technologies to deliver robust, scalable solutions.…

David Emilio Sierra Puentes

I'm a seasoned frontend developer with 15+ years of experience crafting responsive, user-centric web applications. I specialize in React.js and modern JavaScript ecosystems, and I bring a versatile full-stack background that spans WordPress, PHP, Node.js, and mobile with Ionic/Capacitor. I thrive on solving complex UX challenges and shipping high-quality, accessible products. I am passionate about leveraging AI responsibly to boost productivity, improve code quality, and earn user trust. I enjoy collaborating with cross-functional teams and continuously learning new technologies to deliver robust, scalable solutions.…

Available to hire

I’m a seasoned frontend developer with 15+ years of experience crafting responsive, user-centric web applications. I specialize in React.js and modern JavaScript ecosystems, and I bring a versatile full-stack background that spans WordPress, PHP, Node.js, and mobile with Ionic/Capacitor. I thrive on solving complex UX challenges and shipping high-quality, accessible products.

I am passionate about leveraging AI responsibly to boost productivity, improve code quality, and earn user trust. I enjoy collaborating with cross-functional teams and continuously learning new technologies to deliver robust, scalable solutions.

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Skills

Experience Level

Web Design
Expert
HTML5
Expert
CSS
Expert
React JS
Expert
JavaScript
Expert
WordPress
Expert
TypeScript
Expert
MySQL
Expert
Figma
Expert
Node.js
Expert
Bootstrap
Expert
WooCommerce
Expert
Adobe XD
Expert
PHP
Expert
Docker
Expert
Ionic
Expert
GraphQL
Expert
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Language

English
Fluent
Spanish; Castilian
Fluent

Work Experience

React Developer at Click Contracts
September 1, 2024 - May 1, 2026
Collaborated on the ongoing development and growth of clickcontracts.com, a SaaS platform that helps real estate agents streamline contract creation, e-signatures, and transaction management. Built core modules including Reports, Transactions, and Admin Dashboard; led site-wide performance optimization and large-scale refactoring to improve load times and developer velocity.
Web Developer at Creativa Motion
March 1, 2018 - Present
Develop and maintain responsive WordPress websites; create custom WordPress themes and plugins; implement WooCommerce payments; optimize sites for SEO and performance; contribute to the OSADEF Mobile application using Angular/Capacitor; ensure 99.9% uptime across hosting environments.
FullStack Developer at Relatto Media L.L.C
January 1, 2020 - December 1, 2023
Led full-stack development of app.relatto.com using React.js and Firebase; scaled to 4,000+ users and 100+ authors; implemented CMS for publishing articles; integrated PayPal and D.Local payment gateways with multi-currency support and recurring payments; improved SEO and platform revenue; built advertising system and analytics dashboard.
FullStack Developer at Subasta Futbolera SAS
October 1, 2020 - November 1, 2022
Designed and developed a sports betting web application with React frontend and MySQL-PHP backend; created a custom WordPress theme and plugins; implemented E-payco payment gateway; developed RESTful API for unlocking premium app features; implemented live score updates and user predictions.

Education

Bachelor Of Business Managent at Universidad EAN
January 1, 2014 - January 1, 2018
Fron End Specialization at Meta - Coursera
November 5, 2023 - August 2, 2024
Bachelor's Degree in Business Administration at Universidad EAN
January 1, 2018 - May 6, 2026
Studies in Literature with emphasis on Creative Writing at EFAC Chía
January 1, 2021 - May 6, 2026

Qualifications

EF SET English Certification C1
September 23, 2023
EF SET English Certification
January 1, 2023 - May 6, 2026
Meta Frontend Developer Professional Certificate
January 1, 2023 - May 6, 2026
Google UX Design Professional Certificate
January 1, 2023 - May 6, 2026

Industry Experience

Education, Gaming, Software & Internet, Media & Entertainment, Professional Services, Real Estate & Construction, Retail
    paper Relatto

    Full Stack development of the https://www.twine.net/signin platform using ReactJS in the front-end and Firebase in backend for authentication, database and storage.
    Since its launch, the platform has grown to more than 4, 000 registered users and has more than 100 authors across Latin America.