Tag

Backend

3 posts

Oct 6, 2026Development
Rethinking Redemption Codes, Starting with I and L
A question about confusing letters in redemption codes sent me back to the credit redemption feature in my AI drawing app. These are my notes on alphabets, input aliases, error detection, random generation, rate limits, and making sure credits arrive only once.
Redemption Codes UX Backend Security
Jul 10, 2026Backend
Locks Are Not Syntax, They Are Boundaries
A practical explanation of what locks are for, when to consider them, how optimistic and pessimistic locking differ, and why local locks are not enough in distributed systems.
Concurrency Control Locks Database Backend Architecture
Oct 22, 2023Backend
Skip Global NestJS Interceptors for Selected Routes
Skip a global NestJS response interceptor on selected routes with SetMetadata and Reflector, while keeping response wrapping enabled everywhere else.
NestJS Interceptors Backend

Rethinking Redemption Codes, Starting with I and L