$ whoami
markintux
 
$ cat profile.json
{
  "role":     "AI Product Engineer",
  "founder":  ["Byte Livre", "Bargi"],
  "since":    2007,
  "location": "Brazil — Remote"
}
 
$ cat philosophy.txt
AI does not remove engineering.
It moves it upstream: to the spec, to the tests, to the gates.
 
$ ./what-i-do.sh
-> Turn ideas into products that reach production
-> Build SaaS from zero to deploy
-> Engineer the loop: AI agents that ship code under mechanical gates
 
$ cat method.json
{
  "harness":       "in-house AI agent orchestration (mktux-harness)",
  "approach":      "Loop Engineering",
  "process":       "Spec-Driven Development, automated tests gating every phase",
  "memory":        "persistent agent memory (Mem0) - recall before implementing,
                    record decisions after shipping",
  "observability": "OpenTelemetry + Grafana on the agent loop itself",
  "agnostic":      ["any LLM", "any stack"]
}
 
$ cat shipped.json
{
  "bargi":      "Cashless multi-tenant SaaS for bars and pubs - NFC/QR wallet,
                 immutable ledger, keeps selling offline",
  "wterras":    "Rural real estate platform",
  "byte-livre": "Digital businesses end to end - brand, platform, AI Engineering"
}
 
$ cat stack.json
{
  "languages":    ["PHP", "TypeScript", "Python"],
  "core":         ["Laravel", "Node"],
  "databases":    ["MySQL", "PostgreSQL", "SQLite"],
  "frontend":     ["JavaScript", "TailwindCSS", "Alpine.js"],
  "infra":        ["Linux", "Docker", "Nginx", "CI/CD", "Git"],
  "cloud":        ["AWS", "Azure", "Google Cloud", "DigitalOcean",
                   "Hostinger", "Cloudflare"],
  "architecture": ["System Design", "Multi-tenant SaaS", "REST APIs",
                   "Event-driven", "Queue Systems", "Webhooks"],
  "billing":      ["Stripe", "Mercado Pago", "ASAAS", "NFC-e"],
  "ai":           ["Claude Code", "Codex CLI", "OpenRouter", "AI SDK (Laravel)",
                   "Mem0", "OpenTelemetry", "Grafana"],
  "exploring":    ["RAG", "Vector Search (pgvector)"]
}
 
$ ls ./open-source
mktux-harness/               spec -> phases -> autonomous execution, four mechanical gates
claude-codex-otel/           local observability for AI coding agents
mktux-backup/                automated backups for servers and databases
ai-product-engineering-lab/  applied AI engineering experiments
 
$ cat contact.txt
WhatsApp   -> wa.me/5516981083578
LinkedIn   -> linkedin.com/in/marcos-vinicius-campez
Links      -> markintux.me
Studio     -> bytelivre.net
Product    -> bargi.com.br
 
$ █