Bluetooth Low Energy Investigation Engineer (Windows)

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