Design Tinder
A dating app is a location-based social platform that connects people looking for romantic relationships by showing them potential matches nearby and letting them express interest through a simple swipe mechanism.
The core idea is straightforward: users create profiles, the app shows them other users based on preferences and location, and when two people both express interest (swipe right), they "match" and can start chatting.
The scale of modern dating apps is staggering. Tinder alone processes billions of swipes per day and has made over 75 billion matches since launch. Designing a system that can handle this load while keeping interactions feeling instant requires thoughtful architecture decisions at every layer.
This system design problem combines several interesting challenges: location-based queries, real-time matching, recommendation systems, and messaging infrastructure.
In this chapter, we will explore the high-level design of a dating app.
Let's start by clarifying the requirements: