Series

Each series starts from one big engineering question and digs down to case studies and deep dives.

• Message SystemsActive

  How do Messenger and Telegram load thousands of messages almost instantly?

  How major messengers load, store, and sync messages — benchmarked against my own Message Cursor Engine, with the numbers published.

  2 articles published

• Mobile ArchitectureActive

  From MVP to millions of users: how does mobile architecture actually change?

  Architecture as a response to real problems: how mobile apps evolve from MVP to millions of users, and which layers earn their place.

  8 articles published

• E2EEPlanned

  WhatsApp, Signal, Messenger, Telegram: how do they really encrypt your messages?

  How WhatsApp, Signal, Messenger and Telegram actually encrypt messages — keys, multi-device sync, and what E2EE does to a message system's architecture.

  1 article published

• Mobile PerformanceActive

  Flutter, React Native or Native: is the framework really why your app is slow?

  What actually determines a mobile app's time-to-interactive — measured, not assumed. Framework choice is only one line item.

  2 articles published

• RealtimeActive

  My app needs realtime: WebSocket, MQTT, SSE or push — which channel should I choose?

  How events reach a mobile app — WebSocket, MQTT, SSE and push — and the delivery architecture (ordering, retries, gap recovery) that makes a realtime channel trustworthy.

  1 article published

• iOSActive

  My app links the Rust library fine — so why can't the Notification Service Extension call it?

  iOS platform internals from real integration problems: processes, linking, extensions, and what Xcode is actually doing under the build button.

  5 articles published

• Mobile DebuggingActive

  Still debugging Flutter with print()?

  Debugging as an evidence problem: the tools that answer each question better than logs — DevTools, crash reporting, and the AI-facing tooling growing around them.

  1 article published

• AI-Native DeveloperActive

  Copilot, then Codex, then Claude — so why does my workflow still look like 2022?

  How a working developer should actually think about AI: cost structures, verification design, and the skills that gain value as code generation gets cheap.

  5 articles published

• Quality GatesActive

  CI says green — so why did the module boundary just break?

  Turning team and architecture rules into checks that fail the build: CI gates for a packaged E2EE module, choosing Android lint tools, and rolling custom lint rules out across teams.

  3 articles published

• Building HeyDaiSupport

  I didn't choose Astro because it's the best. I chose what HeyDai needs.

  The meta-series: every technical choice behind this site, justified by what it needs — not by what's trendy.

  1 article published