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majard/README.md

Hi, I'm Mah (Marlon Jardim)

Senior Software Engineer.
Builds end-to-end systems where data is messy, latency matters, and failure is not theoretical.

What I work on

  • Monopop — offline-first Android inventory and shopping list manager
    Built for real daily life: managing stock at work and shopping aisle-by-aisle.
    Real users, real feedback, real consequences when things break.
    → Cold start: 3s → 1s (JSI / New Architecture)
    → Critical queries: 1287ms → 5ms (indexes + WAL)

  • Monopop Intel — market price intelligence platform
    End-to-end pipeline: scraping → normalization → storage → API → UI
    Tracks 18,000+ products under real-world inconsistencies.
    → Reduced scraping time from 3h → 6min (asyncio + per-store concurrency)

What I care about

  • Systems that hold up when reality gets ugly
  • Performance, data integrity, and owning the full cycle
  • Making the world a little fairer — one better-informed purchase at a time
    (Monopop = monopsônio popular: the consumer, collectively, becoming the strongest buyer)

Tech
React Native · TypeScript · FastAPI · Python · PostgreSQL · SQLite · Next.js

Pronouns: He/She/They

Open to collaboration, interesting problems, and systems that actually need to work.

After all this time I am still a playful dork, just with more scars and better systems. Feel free to say hi — I don’t bite… usually.

Pinned Loading

  1. majard.github.io majard.github.io Public

    Portfolio — Software Engineer, Rio de Janeiro

    JavaScript 1

  2. Monopop Monopop Public

    JavaScript 1

  3. monopop-intel monopop-intel Public

    Market price intelligence for the Monopop ecosystem.

    TypeScript 1

  4. MinisterioPublicoRJ/parquet-digital-web MinisterioPublicoRJ/parquet-digital-web Public

    JavaScript 7 1

  5. react-pokedex react-pokedex Public

    A simple pokedex app written in react

    JavaScript 1

  6. smarkt smarkt Public

    A simple web application for managing stock and receipts for a supermarket written in django.

    Python 2