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 process
• Proficiency in C/C++
• Experience with real-time DSP
• Fluent English
• Willingness to travel occasionally (3–5 days)

Nice to have

• Experience with ONNX Runtime, DirectML, or QNN
• Knowledge of secure ML model deployment on end-user devices

• Join for a role, stay for the development: More than 40% of our team is working with us longer than 5 years. Explore diverse domains, projects and modern technologies through internal mobility.
• Learn from the best: Almost 60% of all our colleague has over 10 years of professional experience.
• Flexibility: Work fully remotely, full-time from our office in Wroclaw or in a hybrid model.
• Practical benefits: private medical care, life insurance, sport card.