Blog
Short, concrete posts that match the tools. We prioritize correct mental models over keyword density.
Unix timestamps explained without the mystique
Seconds since 1970, milliseconds in JS, and why “timezone of a timestamp” is the wrong question.
Cron for backend engineers: fields, pitfalls, and time zones
Five fields, day-of-week quirks, and the scheduler timezone nobody wrote down.
JWT structure in plain English (and what decoding does not prove)
Header, payload, signature—and why Base64url decoding is not authentication.
When to use UUID v4 vs v7
Random IDs versus time-ordered IDs, index locality, and leakage trade-offs.
Base64 is not encryption
Encoding versus confidentiality, with examples of how teams confuse the two.
Shipping a tiny developer tool site that can pass review
Static hosting, policy pages, content depth, and resisting thin AI doorway pages.