Posts about scalable system design.
Payment webhooks arrive out of order, and a naive handler hands out free subscriptions. A lead engineer's guide to robust Stripe webhook handling: deduplication, race conditions, fetching current state, reconciliation - with PHP and Symfony examples.
Scalable APIs survive more traffic, more consumers and more years. A solution architect's guide to contracts, statelessness, data access, caching, idempotency, rate limiting and evolution - with PHP and Symfony examples.
In this post, I want to address scalable system design and how to grow a system while it's user base grows.
