Matheus Sá
BackClient · Mercado Libre Brasil

Mercado Libre Brasil

Voting and RSVP platform for Mercado Libre's official creators' awards, built to handle traffic spikes.

Type
Project · client
Client
Mercado Libre Brasil
Through
Oroz
Role
Lead Product Designer
Year
2026
Highlights
105k concurrent users, zero downtime
815k sessions
40k validated votes
Shipped in under 6 weeks
Mercado Libre Brasil

Context

Mercado Libre needed a platform for its official creators’ awards that could handle two things at once: a public vote with huge traffic and a restricted VIP guest list, without going down during peaks.

VIP QR-code check-in at the Mercado Libre Awards 2026

What I did

I designed two separate journeys, running on AWS and compliant with Brazil’s LGPD, and owned delivery end to end.

  • For the public, quick sign-up with a one-time code (OTP) and category-based voting on mobile.
  • For the 1,400 VIP guests, a restricted RSVP with CPF validation and dynamic QR-code tickets.
  • For the organizers, a dashboard to manage the guest list and automated WhatsApp and email communication.

Public mobile voting flow by category

Admin dashboard for the RSVP list

Results

The platform handled 105,000 concurrent users with zero downtime, reached 815,000 sessions and 40,000 validated votes, and shipped in under 6 weeks.

VIP RSVP confirmation and email validation