← David Valor · AI Engineer · Venezuela Mobile app · Serverless

Emprende / TeResuelve — an app that connects users with businesses and services

Real case study · By David Valor · AI Engineer · Venezuela

Work evidence

A private monorepo of four applications. The demo isn't public, to avoid exposing flows, credentials, or user data.

A platform that connects end users with businesses and services. I built it as a 4-application monorepo: a mobile app (user), an admin dashboard, a central REST API, and a marketing landing.

The interesting part: the backend

The API is a modular TypeScript monolith that runs as Express locally and as AWS Lambda (serverless) in production — the same code, two modes. It includes JWT authentication, email OTP signup, and real-time WebSocket messaging.

Architecture

In production everything runs serverless on AWS (us-east-1, within the free tier) against MongoDB Atlas; the frontends ship from S3. Near-zero infrastructure cost, ready to scale when it grows.

Role: Full-stack & architecture
React Native (Expo)TypeScriptExpressAWS LambdaMongoDB AtlasWebSocketJWTReact + Vite
Want something like this for your business? I build real apps, platforms, and automations — plus AI agents (Skuld) that search and analyze information so you can decide better. Tell me about your project.