JAVIER VEGA MOLINA

Hi! I'm Javier Vega Molina

Software Developer with experience in creating scalable and modern applications

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Services & Skills

I provide end-to-end solutions for web applications, from design and development to deployment, optimization, monitoring and ongoing maintenance. I help businesses improve their digital presence, build reliable systems, and launch fast, secure websites with custom domains and business email.

Frontend Development

Designing and building modern, responsive, and user-friendly interfaces optimized for all devices. I create fast, accessible, and pixel-perfect web experiences using the latest frontend technologies.

TypeScript

TypeScript

Next.js

Next.js

React

React

Tailwind

Tailwind

JavaScript

JavaScript

HTML

HTML

CSS

CSS

Backend Development

Developing secure, scalable, and high-performance server-side solutions. I build REST APIs, microservices, database architectures, background jobs (Cron, schedulers), and AI-powered features using modern backend frameworks.

TypeScript

TypeScript

Java

Java

C#

C#

Python

Python

NestJS

NestJS

Spring Boot

Spring Boot

.NET

.NET

FastAPI

FastAPI

Node.js

Node.js

Docker

Docker

PostgreSQL

PostgreSQL

Microsoft SQL Server

Microsoft SQL Server

Redis

Redis

MongoDB

MongoDB

Maintenance & Monitoring

Providing continuous support, bug fixing, performance optimization, and new feature development. I implement monitoring tools to keep your systems healthy, stable, and running efficiently.

Grafana

Grafana

Software Testing

Creating automated test suites, including unit, integration, and end-to-end tests. I also design stress and load testing scenarios to ensure system reliability at scale.

Jest

Jest

JMeter

JMeter

Supertest

Supertest

Faker

Faker

Performance & Digital Presence

Improving website speed, SEO ranking, accessibility, and conversion rates. I support business growth through technical SEO, analytics, marketing funnels, and lead-capture strategies.

Google Tag Manager

Google Tag Manager

Google Analytics

Google Analytics

SEO

SEO

Lighthouse

Lighthouse

Web Hosting

Setting up secure hosting solutions with custom domains, SSL certificates, DNS configurations, and business email accounts. Fully managed deployment and hosting for your website or application.

Vercel

Vercel

AWS

AWS

Cloudflare

Cloudflare

Netlify

Netlify

Projects

A selection of my recent work: products built at work, freelance projects and personal side projects.

Featured

Work project

Data Protection Law AI Assistant

A conversational AI agent that makes Ecuador's Data Protection Law accessible to everyone, with accurate, citation-backed answers.

  • Designed a Retrieval-Augmented Generation (RAG) architecture with LangChain and OpenAI that grounds every answer in the text of the law to prevent hallucinations.
  • Added a semantic router to optimize LLM costs and a ChromaDB vector database for document ingestion.
  • Delivered multi-channel access through a React web interface and WhatsApp.
  • Python
  • LangChain
  • OpenAI
  • FastAPI
  • ChromaDB
  • PostgreSQL
  • TypeScript
  • React
  • Tailwind
  • Cypress
  • Jest
  • Vite
  • Docker
  • Keycloak
Internal project · not public
Featured

Independent consultant

Electronic Services Portal — Daule

The digital government portal of the Municipality of Daule, serving 200,000+ residents.

  • Built a high-traffic frontend with React and TypeScript, focused on stability and accessibility for critical public services.
  • Implemented a rigorous end-to-end testing strategy with Cypress, reaching 95% code coverage.
  • Integrated the test suite into a Jenkins CI/CD pipeline to ensure zero-failure releases.
  • TypeScript
  • React
  • Tailwind
  • Cypress
  • Jest
  • Vite
  • Jenkins
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Contact

Have a project idea or interested in my services? Contact me through these communication channels

GitHub

GitHub

JavierVMC29

LinkedIn

LinkedIn

Javier Vega Molina

Email

Email

javiervegamolina29@gmail.com