full-stack engineer
product builder
engineering leader
founder DNA
omar@github:~$ whoami
Javier Omar Cruz Vargas
omar@github:~$ cat profile.txt
Head of Engineering / Founding Engineer at Dex (YC S19)
15+ years building production software across product, platform, and infrastructure
Based in Guadalajara, Mexico
omar@github:~$ ./focus --verbose
- AI-enabled product engineering
- 0->1 execution and scaling systems
- Frontend + backend + DevOps ownership
- Engineering hiring, velocity, and quality guardrailsFull-Stack Engineer with founder DNA. I like hard systems problems, ambitious products, and teams that ship with intent. I build reliable software end-to-end: architecture, implementation, infrastructure, release pipelines, and the operating rhythm around them.
My default mode is part builder, part operator, part terminal goblin.
ai_tooling = [
"Claude Code",
"Codex",
"Gemini CLI",
"OpenClaw",
"OpenRouter",
"MCP servers",
"AI skills"
]| Era | Quest |
|---|---|
2019 -> now |
Dex (YC S19) — Head of Engineering / Founding Engineer. Rebuilt the platform, led migration to Fastify + PostgreSQL, implemented CI/CD in a Turborepo monorepo with GitHub Actions, built the official MCP Server and AI Skill, and helped scale from $0 -> $1M+ ARR. |
2017 -> 2019 |
Rever — Senior Full-Stack Engineer. Joined early, helped scale engineering from 2 -> 10, built product features across frontend and backend, and founded internal tooling. |
2015 -> 2017 |
Lesi — CTO & Founder. Built the company, hired the team, shipped the product, and handled technical strategy with fundraising support. |
before that |
Kukumi, Kbyte, Basiko, Organizala.com, Universidad de Guadalajara, Pan American Games Guadalajara 2011 — a long trail of shipped systems, founder experiments, and web engineering reps. |
- Built products across Dex, Rolodex, and Lebra.
- Shipped payments plus Gmail, Calendar, and Outlook sync.
- Wrote the mini book
Introduction to MEAN. - Taught HTML, CSS, and JavaScript in two 6-month courses at Instituto Tecnologico Superior de Zapopan.
- Native Spanish speaker, conversational in English.
omar@github:~$ echo $INTERESTS
senior_full_stack_roles ai_enabled_product_engineering platform_leadership
omar@github:~$ mailto
[email protected]If you're building something ambitious, weird, useful, or all three: [email protected]