Things I've shipped

I built AluminioLogo's ERP and point-of-sale system from the ground up for a hardware and aluminum distributor with several branches in Venezuela. It covers branch inventory, quotes, returns, receivables, roles and permissions, and a POS that takes payments in USD and bolivares with exchange rates. The part I'm proudest of is fiscal invoicing: a small agent runs as a Windows service in each store and prints invoices, credit notes and daily reports on certified fiscal printers. There is also an admin web app, a mobile app and a product catalog. It has been live in production since October 2026, with more than 3,000 commits. I work with Claude Code daily: I make the architecture decisions and the AI helps me move faster.

MobileWeb

2026

Nest.jsReact.jsTypeScript+12

I designed the customer credit system inside AluminioLogo, inspired by the buy-now-pay-later model that Cashea made popular in Venezuela and adapted to in-store sales. Each client can get a credit line with a USD limit and a payment term, which can come from a template per client type. At the POS a sale is charged to the line, optionally with a down payment in USD or bolívares, and the system refuses it when the line is over its limit or suspended. Partial payments are applied at the day's exchange rate and release credit as they come in. Overdue debt blocks the line automatically and unblocks it once paid, the receivables screen groups debt by age, and every change lands in an append-only history.

WebAdmin

2026

Nest.jsReact.jsTypeScript+6

Wawa is a Venezuelan mobility company running bus circuits, private transport and rentals in Venezuela, Colombia and Guatemala, and I have been the top contributor to its rider app since 2024. My biggest feature there is SRSE, the Smart Request Schedule Engine I designed and built end to end. Riders type where they are going and see every departure of the day as walking plus bus itineraries, with up to one transfer, filtered by real seat availability and ranked by arrival time, transfers and walking. Booking is atomic across legs: a trip gets all its seats or none, and if something breaks the app says which leg failed and offers new options. The engine is pure TypeScript in a hexagonal design with about 660 test cases, load-tested with k6. Around it, the app handles wallet top-ups with several payment providers, favorites, automatic boarding, QR boarding tickets and push notifications, shipped with EAS and over-the-air updates.

MobileFrontend

2026

React NativeExpoTypeScript+14

These are the web tools behind Wawa's mobility operation: a CMS back office with about 38 modules, a B2B portal for companies, a partner portal, a public rentals page and a passenger check-in app for boarding. I worked full stack across the Next.js front ends and the NestJS and GraphQL API. Highlights are a live fleet map and operations monitor, bulk cost uploads from Excel, reports and exports, and phone-OTP login by SMS or WhatsApp. I helped merge the apps into one Yarn monorepo with a shared design system, and I built the QR check-in app with a live bus map. A 62-spec Cypress suite and CI checks protect it.

WebAdmin

2026

Next.jsReact.jsTypeScript+12

AssistAI is a SaaS I built end to end to help small businesses handle WhatsApp customer support, sales and appointment booking with a Claude-powered assistant. It lives in a Turborepo monorepo: a React 19 dashboard and admin panel, and a NestJS API on Postgres with Prisma. The assistant uses each business's own catalog through tool calls and pgvector search, with guardrails against invented prices. I integrated the WhatsApp Cloud API, PayPal and crypto payments, live exchange rates and email flows, and launched it on its own domain. It never found market traction, so I treat it as a product case study and a lesson in validating distribution before building breadth.

WebAdmin

2026

React.jsTypeScriptNest.js+11

DotDevPay is a payments platform I am building to make company payment flows easier in Venezuela. The backend is a NestJS GraphQL API on Prisma and MongoDB where businesses create payment links, manage payment methods and collect from clients through Stripe, Zelle and Pago Móvil. I designed each gateway as its own module behind a shared interface, so adding a new one doesn't touch the rest. It also has role-based access for users and super users, a licensing model with service packages, and analytics for links, methods and clients. Error handling, validated configuration, structured logging and per-environment seeds are all in place.

BackendDevelopment

2026

Nest.jsGraphQLApollo GraphQL+9

A bilingual landing page I built for a Tampa Bay realtor who serves the Hispanic community, with a small NestJS backend that sends every contact form submission into Zoho CRM. The React site uses Material UI and i18next for Spanish and English, validated forms and Meta Pixel tracking for ad campaigns. The API refreshes Zoho OAuth tokens on its own and exposes a single contact endpoint, so leads reach the client's CRM without any manual work.

WebBackend

2026

React.jsTypeScriptVite.js+5

This project was created as a technical test for my subsequent entrance into Wawa. The technical test involved creating a mini system with a backend built using NestJS, Prisma, Apollo GraphQL, and MongoDB. The system allowed storing buses and their corresponding routes in separate tables in the database, with the goal of displaying them later in a frontend developed with Next.js. Additionally, the project included displaying the bus route on a Google Maps map.

WebAdmin

2024

React.jsNext.jsNest.js+8