Architecture & LLD Preview
Matching & Dispatch Framework
How to approach matching/dispatch LLD problems — geospatial indexing, atomic claims, the candidate cascade, and the shared class vocabulary.
Index supply geospatially so 'nearby' is O(k); make assignment a single atomic claim; and cascade to the next-ranked candidate on timeout or decline instead of failing the whole request.
Core Design Challenge
"Design a system that matches supply to demand under contention. How do you find nearby candidates fast and avoid double-assigning one?"
What You'll Learn:
- ✦Real-time matching algorithms for drivers/riders and couriers
- ✦Dynamic surge pricing models based on supply and demand
- ✦Geospatial indexing and proximity coordinates search
- ✦Distributed transaction safety and payment settlement coordinates