Food Delivery

Order lifecycle as a saga across payment, order and dispatch; real-time partner location ingestion; geo-sharded dispatch; peak-hour surge

A low-level design worked end to end in Python — from the reasoning you'd show an interviewer through to the production architecture.

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Page	What's in it
Thought Process	How to reason about this design in an interview
Implementation	Full annotated source with the patterns called out
Database Schema	Tables, indexes and the constraints that matter
High-Level Design	Architecture, scaling and failure modes
Interview Questions	Follow-up questions with worked answers

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Runnable source: food_delivery.py

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