Senior Windows Audio Software Engineer

Location: Remote from Wrocław or Bielsko-Biała, Poland

Salary: 140–190 PLN/h + VAT on a B2B contract

Company

hirify.global delivers a project for a technology company developing on-device audio and speech solutions.

What you will do

• Develop and maintain Windows audio components, including Audio Processing Objects, virtual microphones, and virtual audio drivers.
• Work across the Windows audio stack with WASAPI, WDK, PortCls, and ACX.
• Implement and optimize real-time audio processing and DSP algorithms in C/C++.
• Prepare and validate audio components through Windows HLK testing and WHQL certification.
• Integrate on-device machine-learning inference using ONNX Runtime, DirectML, and Qualcomm QNN.
• Ensure secure, stable, and efficient execution of audio components and ML models on Windows PCs.

Requirements

• Senior-level experience in Windows audio software development.
• Hands-on experience with Audio Processing Objects and/or Windows audio drivers.
• Strong C/C++ programming skills and experience with real-time audio DSP.
• Practical knowledge of WASAPI and Windows audio architecture.
• Experience with Windows Driver Kit, PortCls, or Audio Class Extensions.
• Experience with Windows HLK testing and WHQL certification.
• Fluent English.

Nice to have

• Experience with ONNX Runtime, DirectML, or Qualcomm QNN.
• Knowledge of NPU acceleration on Windows on ARM or x86 AI PCs.
• Experience with secure code and machine-learning model deployment on Windows.

Culture & Benefits

• Remote work from Wrocław or Bielsko-Biała.
• B2B contract with compensation of 140–190 PLN/h plus VAT.
• Work on on-device audio, speech, and machine-learning technology for Windows PCs.