https://rakshyak.dev/blog Essays and notes by Rakshyak Satpathy on backend engineering, system design and API architecture. en-us Thu, 24 Sep 2026 00:00:00 GMT https://rakshyak.dev/blog/dns-explained-simply https://rakshyak.dev/blog/dns-explained-simply Thu, 24 Sep 2026 00:00:00 GMT Networking How DNS resolution really works: the five cache layers, why "propagation" is just TTL expiry, and how to debug NXDOMAIN and SERVFAIL. https://rakshyak.dev/blog/n-tier-architecture-separation-of-concerns https://rakshyak.dev/blog/n-tier-architecture-separation-of-concerns Mon, 31 Aug 2026 00:00:00 GMT Architecture N-tier architecture isn't about counting layers. It's about asking what responsibility belongs where, and why a layer should exist at all. https://rakshyak.dev/blog/design-patterns-arent-a-checklist https://rakshyak.dev/blog/design-patterns-arent-a-checklist Sun, 26 Jul 2026 00:00:00 GMT Essay How treating design patterns as seams for what actually varies, instead of a scorecard of names, made them pay off in a real backend. https://rakshyak.dev/blog/design-patterns-go-to-mindmap https://rakshyak.dev/blog/design-patterns-go-to-mindmap Sat, 18 Jul 2026 00:00:00 GMT Notes A recall-first map of creational, structural and behavioral design patterns, grounded in Go idioms and built for low-level design interviews. https://rakshyak.dev/blog/still-in-the-game https://rakshyak.dev/blog/still-in-the-game Sat, 04 Jul 2026 00:00:00 GMT Essay AI writes first drafts faster than we can frame the task. Why human practice still matters, and why sharp judgment gains value at machine speed.