Sergio Ballestero
ENES
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Sergio Ballestero
Start a project
ENES

Own SaaS · in production

Welcomy

Queue management for branches: visitors take a number, see it called on the room screen and follow their turn on their phone. I designed it, built it alone and run it.

Role
Product design + sole engineer
Type
Multi-tenant SaaS

Built by one person

Design, code and servers

  • Product design
  • Full stack
  • AI
Room display · Clínica San Miguel
Welcomy room display calling ticket CON44 to desk 1

The problem

Branches with walk-in visitors run their lines on paper tickets or costly hardware. Visitors wait blind; managers can’t see where the time goes.

What I did

  • Designed the whole flow. Take a number at a kiosk or from a QR, see it called on the room screen, follow it on the phone. No app to install.
  • Built it alone. Accounts for each business, staff roles, WhatsApp alerts and reports per branch.
  • Run it. On my own servers with Cloudflare in front, an outside uptime monitor, a print agent for ticket printers, and load and mutation tests.

Result A queue system one person designs, builds and runs.

Welcomy kiosk after taking a number: ticket WH2 for the cashier, a 6-minute wait and a QR code to follow it
The kiosk: the ticket, the wait and a QR to follow it on the phone.
Welcomy on a visitor’s phone: ticket CON46, 39 minutes estimated wait and a WhatsApp opt-in
The visitor’s phone: wait estimate and WhatsApp opt-in.
Welcomy operator panel: the waiting line, quick actions, the current ticket CON44 and today’s totals
The desk: who is waiting, who to call next and how the day is going.
Welcomy analytics: total tickets, average wait and service time, completion rate and a ticket volume chart
Analytics: waits, service times and volume for each branch.

Want one like this?

Tell me what you’re building. I usually reply within 1–2 business days.

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