by Anthony Silva | Sep 10, 2026 | Uncategorized
Duplicate requests are one of the silent killers of production APIs. A user double-clicks a “Pay” button, a mobile client retries after a timeout, a webhook fires twice, and suddenly your customer is charged twice. The fix has a name: idempotency keys. In...
by Anthony Silva | Sep 6, 2026 | Uncategorized
Concurrent updates are one of the most common sources of subtle bugs in modern web applications. When two users try to modify the same record at the same time, one of them will silently overwrite the other’s changes unless you implement a proper concurrency...
by Anthony Silva | Sep 3, 2026 | Uncategorized
Handling file uploads sounds simple until you actually ship it to production. Suddenly you’re worried about oversized files crashing your server, malicious MIME types slipping through, and how to serve private files without exposing your S3 bucket to the world....
by Anthony Silva | Aug 31, 2026 | Uncategorized
Hard deletes are one of the most common causes of data integrity nightmares in modern SaaS applications. When a user clicks “Delete Account” and your database physically removes the row, you lose audit trails, break foreign key relationships, and often...
by Anthony Silva | Aug 28, 2026 | Uncategorized
Adding real-time features like chat, notifications, or live dashboards to a Next.js application requires more than just standard API routes. If you want true bidirectional communication, you need WebSockets. In this practical guide, we walk through implementing a...
