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2025·Full-stack development (Freelance)
Internal system · In production

Alquileres J&M

Full-stack equipment-rental management platform for a construction company, running in production for internal use.

Next.jsFastifyPostgreSQLOn-premise
Alquileres J&M

The problem

A construction company managed its equipment rentals with pen, paper and Excel sheets. That made client pre-billing slow and real inventory control difficult.

What I built

I designed and developed an end-to-end rental management platform, deployed to production on the company's on-premise server (private access within their network).

  • Tracking of 200+ assets with real-time inventory.
  • Client billing and automated pre-billing.
  • Admin dashboard for daily operations.

Outcome

It fully replaced the manual process, sped up pre-billing and improved inventory control. Stack: Next.js, Fastify, PostgreSQL.

Screenshots

Alquileres J&M — dashboard

Alquileres J&M — dashboard