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Architecting a Low-Power GPS Geofencing Engine for Android without Draining the Battery

It was the middle of a Friday afternoon, and I was sitting in a quiet, solemn gathering. The room was hushed, filled with people focused on the speaker at the front.

  • Utilized GeofencingClient API to define geographic regions
  • Offloaded GPS processing to Android framework via BroadcastReceivers
  • Implemented ForegroundService with persistent notification for Doze mode

OCR Uploaded Scans and Store Extracted Text in 4 Stages (With Validation)

An e-commerce document service should accept a scan, persist the private original, enqueue OCR, store extracted text under the document ID, and redact a derived copy before anybody shares it.

  • Four-stage asynchronous pipeline processes uploaded scan
  • Accepts scan, persists original, performs OCR, stores text
  • Validation checks upload, rejects empty or unsupported files

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