A bloom filter is a tiny data structure that can answer 'have I seen this before?' in microseconds, using a fraction of the memory of a hash set, at the cost of being occasionally wrong in one direction. That trade-off turns out to be load-bearing in databases, browsers, CDNs, and storage engines you use every day.
Engineering Craft
TypeScript, CI/CD, databases, observability -- the skills that make code production-ready.
