JLJoão Lorenzo
ENPT

Selected work

Platforms in production

Three case studies from the products I lead. Client names and financial figures are confidential; the architecture, the decisions and the outcomes are not.

  1. 01

    AI platform · Joint venture

    An omnichannel AI platform, from first commit to production

    How we built a multi-tenant SaaS where AI agents answer customers on WhatsApp, Instagram, Telegram and web chat, and hand the conversation to a human when they should.

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    Role
    Co-founder, lead engineer and product lead
    Period
    Nov 2024 — present
    Stack
    NestJS, PostgreSQL, Redis, Python, LangGraph, Qdrant, Go, Nuxt
  2. 02

    Travel · Marketplace

    A travel marketplace, live on iOS and Android in four months

    Members-only stays, tours and restaurants, with split payments, calendar sync with Airbnb and Booking.com, and an API that AI agents can query.

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    Role
    Lead engineer and DevOps, through Pyp System
    Period
    Mar 2025 — present
    Stack
    NestJS, PostgreSQL, Redis, Next.js, React Native, Docker
  3. 03

    Engineering practice

    Zero-downtime deploys, several times a day

    Blue-green releases with Docker, GitHub Actions and nginx, shared by every product I lead and shipping several times a day.

    Read the case study →
    Role
    Designed it and rolled it out across products
    Period
    2025 — present
    Stack
    Docker, GitHub Actions, nginx, PostgreSQL, Redis