About the role:

Investigate and diagnose issues related to unstable Bluetooth Low Energy (BLE) connections on Windows-based computers, with a focus on:

-connection drops

• instability with multiple concurrent BLE connections -GATT notification latency and packet loss

The role requires an in-depth analysis of the Windows BLE stack, including: -Bluetooth drivers (driver/firmware level)

-WinRT BLE API

• interaction between applications and the system Bluetooth stack

Bluetooth Driver Analysis: -analyze BLE drivers provided by nRF Nordic chipset vendors -investigate controller firmware limitations -analyze HCI-level behavior (USB / PCIe transport) WinRT BLE API Analysis: -analyze usage of: Windows.Devices.Bluetooth, Windows.Devices.Bluetooth.GenericAttributeProfile -identify issues caused by: asynchronous WinRT execution model, serialization of GATT operations, API limitations (lack of control over BLE connection parameters), provide architectural recommendations for application-side changes

Debugging and Diagnostics: -analyze Windows system logs: Event Viewer, Bluetooth ETW traces, -use diagnostic tools such as: Bluetooth LE Explorer, Windows Performance Recorder / Analyzer, correlate application-level events with driver and stack behavior

Windows -solid understanding of: Windows Bluetooth stack architecture, differences between Win32 and WinRT, -practical experience with: WinRT BLE APIs, BLE integration in desktop

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