I will build your full stack web app or saas mvp with nextjs and postgresql

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Leonel Guerrero
build your full stack web app or saas mvp with nextjs and postgresql
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build your full stack web app or saas mvp with nextjs and postgresql
Full Screen
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build your full stack web app or saas mvp with nextjs and postgresqlbuild your full stack web app or saas mvp with nextjs and postgresqlbuild your full stack web app or saas mvp with nextjs and postgresql

About this gig

One senior engineer who owns the whole thing: database, backend, frontend, infra and deploy. No handoffs, no agency overhead, and I use AI agents in my own delivery, so you get senior work faster and well under US agency rates, in US time zones.


Stack I ship with: Next.js 16, TypeScript, Tailwind, PostgreSQL, Drizzle, Docker, GitHub Actions, Vercel or your own server, Sentry and PostHog wired in from day one.


What you get

  • A scope call first. I turn your idea into a written scope with milestones before any money moves past the deposit.
  • Working software every week, on a URL you can click.
  • Production setup, not a demo: auth, validation, tests, monitoring, backups.
  • Docs and a handover session so your next developer (or you) can keep going.


Proof: I built a 25-landing multi-tenant platform with CRM pipeline and self-hosted stack, a bilingual portfolio with rate-limited forms and CRM sync, and shipped mobile plus web products for startups. Links on my profile.


Prices are starting points. Tell me what you're building and I'll answer with a scope and a fixed price within 48 hours.

  • Programming language

    • TypeScript

  • Expertise

    • Debugging
    • Performance
    • Security
    • Databases
    • Testing procedures

  • Frontend framework

    • Next.js
    • React.js
    • Tailwind CSS

  • Backend framework

    • Django
    • Express.js
    • Next.js
    • Node.js
    • Django REST framework

Get to know Leonel Guerrero

Leonel Guerrero

Full stack product engineer, I ship whole products and set up your AI

  • FromUnited States
  • Member sinceMar 2025

  • Languages

    English, Spanish
I set up ChatGPT, Claude or Gemini around how you already work, so it reads your email, answers WhatsApp, writes your meeting minutes and books calls. Not a course: I map your week, wire the AI to your tools, and hand it over running. Also a full-stack product engineer: 8 years in tech, 5+ shipping whole products alone. TypeScript, Python, React Native, plus Ruby, Java, C# and PHP; any codebase, even Lovable or Cursor output. I build AI agents and MCP servers. English and Spanish; other languages via real-time translation on calls, with your setup and docs in your language. Dallas, TX.

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