Claudio Castillo
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Case study, Rezerb

Designing and building a scheduling SaaS for small businesses in Chile

Small service businesses lose money on every empty slot. I co-founded Rezerb and designed and built everything but the backend, from the brand to the booking flow customers use every day.

Year
2024
My role
Co-founder, design & frontend
Timeline
2024 — Present
Stack
React, Tailwind CSS
Occupancy
+15%
Rezerb on mobile: the landing page and the automatic waitlist

The problem

Barbershops, hair salons, nail studios and vets in Chile run on their appointment book. Every empty slot is money lost, whether it comes from a no-show, a last-minute cancellation, or a customer who never booked at all.

The existing tools charge a commission on every booking, so the more a business grows, the more it pays. We wanted a product that helps fill the schedule and charges a flat monthly fee.

My role

I co-founded Rezerb and own everything except the backend: brand, product design, UX and UI, and the frontend in React and Tailwind CSS. That covers the marketing site, the public booking page each business shares, and the dashboard where businesses run their day.

Rezerb dashboard: weekly calendar with appointments by service, plus navigation for clients, income, waitlist, branches and team

The key decision: a waitlist where customers propose the time

Talking with businesses, we saw a pattern: when a customer couldn’t find an open slot that worked for them, they simply didn’t book. That demand was invisible, and the business never knew it existed.

So instead of a passive waitlist, Rezerb lets the customer propose a time. The business gets the request and accepts it if they can take the appointment then. A customer who would have left now becomes a booking, and the business decides whether to open that hour.

The same list fills cancellations: when someone cancels, the next customer waiting gets notified and can take the slot.

Rezerb features: automatic waitlist, integrated payments with MercadoPago, and automatic WhatsApp and email reminders

Pricing as part of the product

A flat monthly fee with no commission per booking. The pricing section makes the comparison explicit, so the value is clear before anyone signs up.

Pricing comparison: competitors charge around $64,000 CLP a month in commissions, Rezerb starts at $8,990 CLP a month with $0 per booking

Outcomes

15% higher occupancy

Businesses using Rezerb filled 15% more of their schedule, driven by the waitlist turning customers who would have left into bookings.

Live with businesses in the Valparaíso Region

Rezerb is in daily use by several businesses across the Valparaíso Region, Chile.

Designed and shipped by the same hands

Owning both design and frontend meant decisions went straight from Figma to production, without a handoff in between.

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