Use a microservices architecture to ensure individual services (like GrabFood or GrabPay) can scale independently without crashing the whole app.
Do not build your own payment processing from scratch. Use Stripe Connect (for split payouts) or Adyen (for platform payments). Only build the wallet ledger yourself. how to build a multi-service app like grab
Building a multi-service "super app" like Grab is a high-stakes engineering feat that transforms a single-purpose utility into a central digital ecosystem. Success lies in seamlessly integrating high-frequency services—like ride-hailing and food delivery—with a robust digital wallet to keep users within your platform all day. 1. The Super App Business Strategy Only build the wallet ledger yourself
: Start with one high-demand service (e.g., ride-hailing or delivery) to build a critical mass of users and drivers. Restaurant) through statuses ( Idle ->
| Layer | Technology | Why? | | :--- | :--- | :--- | | | Flutter / Kotlin Multiplatform | One codebase for rider/driver apps. | | Backend | Go (for matching) + Node.js (for payments) | Go handles 1000s of concurrent WebSockets. Node handles rapid UI changes. | | Geospatial | Redis + PostGIS | Redis for live proximity; PostGIS for analytics. | | Queues | RabbitMQ or Kafka | To handle order timeouts (e.g., "Cancel if no driver after 90 sec"). | | DevOps | Kubernetes (GCP/AWS) | Auto-scale drivers during rush hour. |
A state machine that tracks every entity (User, Driver, Order, Restaurant) through statuses ( Idle -> Matched -> Picked Up -> Dropped Off -> Paid ). Use a rules engine (e.g., Drools or custom Go routines) to switch logic per vertical.