Airbnb Marketplace Platform

Airbnb

Airbnb connects millions of hosts and guests through a sophisticated two-sided marketplace. The platform handles real-time availability calendars, dynamic pricing based on demand, full-text and geospatial search for listings, a multi-step booking flow with payment escrow, and a trust-building review system. Tailored for engineers building two-sided marketplaces with complex search, booking calendars, and trust-and-safety workflows.

Data Flow

CDN

API Gateway

Email Queue

Search Service

Booking Service

Review Service

Listing Search

Core Database

Photo Storage

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Service Breakdown (9 services)

Compute3 services

Search Service

•Runs containerized microservices at scale
•Auto-scales based on CPU and memory utilization
•Supports rolling deployments and health checks

Booking Service

•Runs containerized microservices at scale
•Auto-scales based on CPU and memory utilization
•Supports rolling deployments and health checks

Review Service

•Runs containerized microservices at scale
•Auto-scales based on CPU and memory utilization
•Supports rolling deployments and health checks

Storage1 service

Photo Storage

•Stores objects with eleven 9s of durability
•Supports lifecycle policies for cost optimization
•Serves as a data lake foundation

Networking2 services

CDN

•Caches and delivers content at the edge globally
•Reduces latency with geographically distributed PoPs
•Handles SSL termination for all inbound traffic

API Gateway

•Routes and throttles incoming API requests
•Enforces authentication and rate limiting
•Provides a unified entry point for microservices

Messaging1 service

Email Queue

•Decouples services with reliable message queuing
•Supports standard and FIFO delivery modes
•Scales automatically with message volume

Data2 services

Listing Search

•Powers full-text search and log analytics
•Scales horizontally for large datasets
•Supports real-time indexing and querying

Core Database

•Manages relational databases with automated backups
•Supports Multi-AZ for high availability
•Handles read replicas for scaling reads

Scaling Strategy

Search scales through OpenSearch with read replicas for geospatial queries across millions of listings. The booking service uses RDS with optimistic locking to prevent double-bookings. SQS decouples transactional emails and notifications from the booking flow. Photo storage and serving scales via S3 + CloudFront with automatic image optimization at the edge.