NEW CASE STUDY! 🙌

NEW CASE STUDY! 🙌 E-Strum: App + Device for Tracking Light Availability at Home

ABOUT THE APP: Scheduled and unscheduled power outages in Ukraine made it hard for people to plan their day. The client wanted a hardware device paired with a mobile app that detects light presence in a room and builds analytics from it — so people could plan around real outage patterns, not guesswork.

THE CHALLENGE: - Take E-Strum from concept to a working hardware + software product:

- Ship secure OTA firmware updates (CI/CD, embedded flashing code, secure distribution server).

- Handle high device load without degrading service.

THE PROCESS: - Ran discovery first - locked requirements before build, since hardware mistakes are far costlier to fix late than software ones.

- Tackled the riskiest unknowns early - OTA firmware and device-connection logic went first, ahead of UI work.

- Split hardware and backend workstreams in parallel, with device registration/events as the shared contract between them.

THE RESULTS - Rolled out OTA firmware updates to 1,000+ connected devices with zero manual re-flashing required 💯

Kept backend response times under 300ms even as concurrent connected devices scaled past 1,200 🙌

Held device-connection success rate at 97%+ on first attempt under real-world Wi-Fi conditions 🧠