I'm Javier Velásquez

A curious and dedicated full-stack developer who loves solving problems through code.

I enjoy building applications that are clean, scalable, and impactful.

Working with powerful technologies like React, TypeScript and Node.js.

Let's create something remarkable together.

Get in touch

Work Experience

Lead Frontend Developer — Simbiótica AI

Nov 2022 - Jul 2023

  • Developed an application aimed at reducing waitlist times in the public health sector.
  • Led the frontend development team, assigning tasks and reviewing code for quality and design fidelity.
  • Collaborated with backend team to integrate REST APIs and assist in endpoint design.
  • Worked closely with UX/UI designers in Figma, translating interfaces into clean, reusable, and scalable code.
  • Used Git through GitHub, reviewing pull requests and authorizing merges.
  • Reduced total application size by 75%, improving load times and reducing errors.

Key skills: TypeScript, React, Next.js, Node.js, Express, CSS, Git, Figma, SQL, AWS

Full-Stack Developer — Freelance

May 2019 - Present

  • Designed and developed multiple projects including landing pages, e-commerce stores, and mobile apps.
  • Ensured accessibility and a strong user experience in all projects.
  • Integrated third-party services like payment gateways and messaging APIs.

Key skills: React, React Native, HTML, CSS, JavaScript, PHP, MySQL, PostgreSQL, Express

Open Source Contributor — Java Projects

Ongoing

  • Contributed to open source Java projects, improving features and fixing bugs.
  • Opened and tested pull requests, collaborating with international developers.

Key skills: Java, Git, GitHub, Collaboration

Skills

React

Expert

TypeScript

Expert

Node.js

Expert

Express

Expert

Next.js

Expert

CSS

Expert

Tailwind

Advanced

Git / GitHub

Advanced

React Native

Advanced

SQL

Intermediate

AWS

Intermediate

Java

Intermediate

Check my last project

Preview of my latest project

Built with React and Next.js, this web project showcases interactive animations, combining sleek, scalable design with a seamless user experience.

Visit Project

Let's work together

Have a project in mind? Drop me a message!