Flipkart Marketplace Platform · View 22 of 25 · 6 · Operations
The contract
- Cart, checkout and payment are protected and never shed — every other capability has a written downgrade
- Each cell is a feature flag with an owner, exercised in the pre-sale game day, not a description of intent
- Recommendations, reviews and personalised banners go off before anything on the money path slows down
Techniques behind the table
- CDN and edge caching, pre-warmed caches, precomputed segments and read replicas absorb the read amplification
- A virtual waiting room makes the queue fair and bounded rather than letting the load balancer decide
- Queue-based load levelling with backpressure: writes are accepted quickly and processed asynchronously wherever the customer does not need a synchronous answer
Risks
- Degradations interact: cached prices plus a stale availability filter produces a Buy Box that cannot be bought
- The waiting room is the most visible failure in the set — if it is wrong, the sale is the story
- Physical fulfilment capacity, not software, is the binding constraint above about 5x
