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

Background Action! is a casting platform I built for a Mexican film and TV extras-casting company, rebuilding an older system with a large base of talent profiles. One Expo codebase delivers iOS, Android and web: an eight-step registration wizard with a live casting ID card, photo books, a skills catalog, legacy-profile import and Premium subscriptions. Payments use Stripe on the web and native in-app purchases on mobile. I added push notifications and versioned legal acceptance, and co-built the Laravel 13 API. The first working version took about a month, with automated tests and release runbooks. I used Claude Code throughout, directing the architecture myself.

MobileWeb

2026

ExpoReact NativeTypeScript+10

Legal Global Consulting manages rental protections and legal guarantees for clients in Mexico, and I have built its client product since the beginning. First came the React web front end, then the original React Native app on the App Store and Google Play, and most recently a full rebuild on Expo SDK 57 that ships as an in-place update to the same store listings. The new app also runs on the web from one codebase. Clients calculate and contract protections, follow their policies, book appointments, report breaches, pay with Stripe or PayPal and get push notifications. I also contribute to the Laravel API. A large Jest suite kept the migration low risk.

WebAdmin

2026

React NativeExpoExpo Router+9

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

I led the rebuild of RED1A1, a Mexican real-estate marketplace and professional network, across web, mobile and API. The new Next.js 16 site has a map-first home, directories, owner and admin dashboards, white-label agent websites and Stripe checkout. I shipped a new Expo app as an in-place update to the existing App Store and Google Play listings, with realtime chat, push notifications, native in-app purchases and over-the-air updates. On the Node and MongoDB backend I added realtime delivery, membership logic and scheduled jobs. Strict TypeScript, Zod validation and a 70-flow Maestro suite on Android keep it steady. This extends my earlier work on RED1A1's template pages.

WebBackend

2026

Next.jsReact.jsTypeScript+12

HUMAE is a private recruitment platform in Mexico that connects vetted candidates, client companies and an internal recruiting team. I replaced the legacy system with a full rewrite: a Laravel 12 API and a Next.js 16 front end with four role-based experiences. Candidates build profiles, take configurable psychometric tests, generate a CV and pay for membership through Stripe. Recruiters search a filtered talent directory and move people through a drag-and-drop pipeline. Companies post private vacancies and confirm interviews. I owned the architecture, backend, frontend, billing, tests with Pest, Vitest and Playwright, and the production runbook. It is live today.

WebAdmin

2026

Next.jsReact.jsTypeScript+11

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

I built an internal back office for a Mexican rental-guarantee company, replacing spreadsheets and an older PHP system. The React and Laravel app brings branch expenses, income analysis, budgets, payroll, attendance, vacations and employee contracts into one role-based dashboard. I implemented the biweekly payroll engine with automatic period rollover, versioned recalculations and bonus tiers, vacation balances that follow Mexican labor law, contract expiry alerts, and an executive dashboard with scheduled Excel reports. I worked end to end, from the data model and cron jobs to the Material UI screens, over about ten months, through Internet 360.

WebAdmin

2026

React.jsTypeScriptMaterial UI+7