I will build scalable websites with next, postgresql, typescript

C
csalguero441
C
csalguero441
Carlos Salguero
build scalable websites with next, postgresql, typescript
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build scalable websites with next, postgresql, typescript
Full Screen
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build scalable websites with next, postgresql, typescriptbuild scalable websites with next, postgresql, typescriptbuild scalable websites with next, postgresql, typescript

About this gig

Build your SaaS the right way -- or pay for it later.


Most SaaS products don't fail because of the idea. They fail because the first version is built wrong.


  • Too complex -> slow, expensive, hard to change
  • Too simple -> breaks when real users arrive


I help you build the version that actually scales. I've shipped multi-tenant SaaS products as a founder and owned full-stack architecture for internal platforms used by engineering teams.


You're not just hiring a developer -- you're getting someone who thinks about the product long term.


What you get:

A fully working, deployed SaaS, including:

  • Next.js + TypeScript frontend
  • Node.js or Go backend
  • PostgreSQL + Prisma
  • Authentication (secure, production-ready)
  • Multi-tenant architecture (if needed)
  • Stripe billing & subscriptions
  • Clean, maintainable codebase
  • Deployment (Vercel, Railway, or AWS)
  • Docker setup (optional)


What I build

  • SaaS MVP (B2B / internal tools)
  • CRMs & admin dashboards
  • Multi-tenant platforms
  • Subscription & billing systems
  • Shopify integrations (including bidirectional sync with ERPs)


Not a fit:

  • WordPress sites
  • Shopify themes
  • Mobile-only apps

  • Website type

    • Saas

  • Programming language

    • JavaScript
    • TypeScript
    • React
    • Tailwind CSS
    • Angular

  • Website features

    • Payment
    • Inventory
    • Analytics
    • Booking
    • Calendar
    • Dashboard
    • Reviews
    • Landing page
    • User Authentication
    • Admin Panel

Gig milestonesNEW

Choose to pay for your project per milestone by only paying when it’s time to start a new one or decide on a 1-time payment.

    Basic Package.
    These are the steps we’ll follow to complete your project.
  • 1st Milestone: Planning
    1-day delivery · 1 revision
    $50Pay now

    I'll use your provided requirements to start planning your website.

  • 2nd Milestone: Website Design
    1-day delivery · No revisions
    $75
    Pay later

    I'll create the design for your website.

  • 3rd Milestone: Development
    3-day delivery · 1 revision
    $175
    Pay later

    I'll develop the website and deliver a working product for your review.

  • 4th Milestone: Progress check
    1-day delivery · 1 revision
    $50
    Pay later

    We'll meet to review your project status and the steps needed to finish it.

  • 5th Milestone: Delivery
    1-day delivery · No revisions
    $50
    Pay later

    I'll send you the final delivery for review and feedback.

Respect third-party rights

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Get to know Carlos Salguero

Carlos Salguero

Senior AI Systems Architect and Backend Engineer

5.0(2)
  • FromMexico
  • Member sinceNov 2024
  • Avg. response time4 hours
  • Last delivery3 weeks

  • Languages

    English, Spanish, German, Korean
Senior AI Systems Architect & Backend Engineer. I specialize in high-performance infrastructure and production-grade RAG pipelines. With experience processing 100k+ daily records at Fortune 500 scale (PPG Industries), I build secure, deterministic systems. IEEE-published researcher (CHILECON 2025) and founder of Qantara Systems. I engineer using Go, Rust, and Python, ensuring a strict 95% test coverage standard. CS graduate from Tec de Monterrey. I don't build wrappers; I build production ecosystems. Message me for complex requirements.

My Portfolio

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