Luis Javier Tovar Full Stack Developer · Senior Fullstack Engineer at Valtech

I build AI products from the first commit to production.

With over 8 years of experience in web development, I specialize in creating dynamic, user-friendly interfaces and optimizing performance while maintaining high code quality standards. Known for my positive attitude and results-oriented approach, I consistently exceed expectations.

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Products I've built end to end

Idea, interface, data model, integrations and deploy. Each one is live on real infrastructure.

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listys-web-app.vercel.app

Listys

Live SaaS · OCR · Realtime

Full-stack SaaS app for shopping planning and receipt digitization with OCR. It includes authentication, real-time shopping sessions, base list management, history tracking, and Supabase synchronization.

Receipt digitization with OCR
Real-time shopping sessions
Auth, base lists and history tracking
Supabase sync with Edge Functions

TypeScript

Next.js

Supabase

Supabase Edge Functions

TailwindCSS

Shadcn/UI

Zod

React Hook Form

Zustand

Framer Motion OCR

Open Listys Private repository

taggy-5ygezxye9-ljaviertovar-s-team.vercel.app

Taggy

Live SaaS · Computer vision · Payments

Automatically categorize tag images and generate captions using AI.

Image categorization with Google Vision
AI caption generation with OpenAI
Stripe payments
Media pipeline on Cloudinary

Next.js

TypeScript

Chakra UI

Supabase Google Vision API

OpenAI

Cloudinary

Stripe

Open Taggy Private repository

fillbg.vercel.app

FillBG

Live AI tool · Generative fill

Fill background images with AI in different aspect ratios adapted for different platforms.

Generative background fill
Aspect ratios adapted per platform
Image transformations on Cloudinary

TypeScript

Next.js

Cloudinary

OpenAI

Shadcn/UI

TailwindCSS

Open FillBG Code

dokyfile.vercel.app

Dokyfile

Live Developer tool · LLM

Web application to validate and generate Dockerfiles with a friendly UI.

Dockerfile validation
AI-assisted Dockerfile generation
Friendly UI for a CLI-heavy task

TypeScript

Next.js

Shadcn/UI

OpenAI

TailwindCSS

Open Dokyfile Code

E-commerce, from discovery to fulfillment.

I build core commerce modules across the customer journey. My current production experience is centered on VTEX IO, with platform-agnostic architecture.

React

Next.js

Node.js

TypeScript

GraphQL

VTEX IO

Storefront and custom components
Reusable, accessible UI for landing pages, content sections and merchandising experiences.
Catalog and product discovery
Search, navigation, filters, sorting and product experiences across PLP and PDP.
Cart, pricing and promotions
Product variants, quantities, minicart interactions, coupons and clear pricing feedback.
Checkout and payments
Customer data, address flows, payment methods, validations and order confirmation.
Shipping and fulfillment
Address validation, delivery options, availability, pickup and logistics integrations.
Orders and post-purchase
Order creation and validation, status tracking, documents, notifications and third-party services.

filtering-system-gamma.vercel.app

Engineering work

Starters, tools and the code behind the articles I publish.

View all 24 projects

E-commerce Filtering System

Web application that allows to search and filter items dynamically and in real time. Ideal for e-commerce product catalogs or projects that require complex filters based on multiple criteria.

TypeScript

Next.js

Shadcn/UI

Live Code

Next.js SaaS Starter

Starter kit for build a SaaS. It includes authentication, Emailing, billing, and more.

Next.js

TypeScript

Shadcn/ui

Code Article

Logobuilder

Web application that allows you to create logos for your projects.

Next.js

TypeScript

Shadcn/ui

Live Code Article

Next.js issue tracking

A web application to check Next.js git issues using TanStack Query.

React

TypeScript

TanStack Query

Live Code

Experience & skills

Eight years shipping software, the last five in enterprise e-commerce.

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Experience

2018 — Present

Jun 2025 — Present
Senior Fullstack Engineer · Valtech Now

Designs and builds webhook-based backend services for e-commerce order validation, document generation and third-party integrations, including a compliance integration with Argentina's ARCA Services. Builds full-stack solutions with Next.js, React, Node.js, TypeScript and GraphQL, focused on reliability and scalability across distributed systems.
Dec 2022 — May 2025
Senior Fullstack Developer · Corebiz

Provided technical leadership for the Walmart Central America project: guided developers through complex problems, led code reviews and PR approvals, managed critical production incidents with root cause analysis, and worked closely with UX/UI, business and product teams to align technical solutions with business objectives.
Apr 2021 — Dec 2022
Semi Senior Frontend Developer · Corebiz

Implemented Google Maps in React applications, reducing address-capture errors by 30% and improving on-time deliveries by 20%. Built reusable, accessible React components for large-scale e-commerce platforms including Walmart, HEB and Chanel, plus VTEX IO storefronts and Node.js/TypeScript middleware.
Feb 2018 — Apr 2021
Fullstack Developer · CPA Vision

Migrated core services from PHP to JavaScript, cutting execution time by 40% and increasing successful responses by 20%. Built Node.js/Puppeteer web scrapers deployed on AWS EC2 with PM2, REST APIs, Crontab-driven background jobs, and scheduled Email/SMS/WhatsApp notification systems.

Skills

Development

JavaScript

TypeScript

Redux

Zustand

Prisma

Docker

Cloudinary

Stripe

OpenAI

Git

GitHub

GitLab

GitHub Actions

Frontend

React

Next.js

Astro

HTML

CSS

SASS

Chakra UI

Tailwind CSS

Shadcn/UI

Backend

Node.js

Express

GraphQL

PHP

MySQL

MongoDB

Supabase

Testing

React Testing library

Jest

Puppeteer

Playwright

Cypress

Design Tools

Figma

Adobe XD

Design Experience

UI/UX Design Responsive Design Mobile First Design

Collaboration

Slack Microsoft Teams

Jira

Notion

Soft skills · Strong Communication · Teamwork · Problem Solving · Critical Thinking · Time Management · Adaptability · Leadership · Creativity · Attention to Detail