Senior Software Engineer – Windows Audio

About Altimi Altimi is a technology acceleration partner with impressive experience spanning over 20 years, specializing in the successful delivery of software development projects for international customers. We are based in Poland. Our main area of operation is the DACH region and Scandinavia, where we are known for providing top-notch software development services.

Our primary focus are managed services for companies seeking to accelerate growth, solve complex tech problems, build MVP/POC and/or modify legacy infrastructures. The main area of competence include Product & Application Engineering, DevOps, Cloud Security & Managed Services and AI & Data Enablement. Role Overview We are looking for a Windows audio stack specialist to join a project for an EU-based company in embedded audio systems and speech processing.

The work covers developing audio drivers and components and running AI models securely on PCs. Occasional business trips of 3–5 days may be required, especially at the start of the project.

Designing and developing APOs (Audio Processing Objects) Building virtual microphones and audio drivers Working with WASAPI, WDK, and PortCls/ACX Preparing solutions for HLK/WHQL certification Implementing real-time DSP Integrating and running models using ONNX/DirectML/QNN

Extensive experience with the Windows audio stack Experience developing audio drivers (WDK, PortCls and/or ACX) Knowledge of APO and WASAPI Experience with the HLK/WHQL proce