Signal Processing Engineer

Signal Processing Engineer – Audio & Ultrasound (Embedded Systems Focus)

Graz, Austria

Contract Duration: 6 - 12 months

Engagement Type: Contractor / Freelancer

USound is disrupting the audio industry, setting new standards in audio experience, and maximizing the degrees of freedom in manufacturing wearables and hearables.

We are leaders in acoustic solutions based on MEMS speakers. Since 2018, we have been enabling our customers to bring new revolutionary audio products to the market. USound achieves this through radical miniaturization, power reduction, and increased production efficiency.

We are looking for an experienced contract Signal Processing Engineer to join us for a 6–12 month project focused on real-time audio and ultrasonic algorithm development for embedded systems. This role is best suited for someone who is independent, technically strong, and able to contribute quickly with minimal ramp-up.

You will take a hands-on role in designing and implementing high-performance DSP algorithms, with a strong focus on embedded C firmware for low-power platforms used in wearable and consumer audio devices.

Technical Expertise

Personal Evolution

Autonomy

Responsibilities

• Design, implement, and optimize real-time signal processing algorithms for audio and ultrasound.
• Develop and maintain embedded C firmware for DSP-enabled microcontrollers.
• Collaborate with hardware and software engineers to integrate and validate algorithms on real devices.
• Debug and troubleshoot system-level issues across firmware, hardware, and signal chain.
• Contribute to architecture discussions and help define future DSP features.
• Deliver clean, efficient, and well-documented code with a focus on real-time performance.
• Operate with minimal supervision and take ownership of deliverables.

Experience and Qualifications

• Proven experience with DSP development, particularly in audio and/or ultrasound applications.
• Strong hands-on skills in Embedded C for real-time systems.
• Deep understanding of signal processing fundamentals and real-time constraints.
• Experience working on low-power embedded platforms.
• Strong problem-solving, debugging, and optimization skills.
• Ability to work independently and manage time effectively in a fast-paced environment.

Bonus Skills

• Familiarity with Bluetooth audio or TWS (True Wireless Stereo) systems.
• Python for signal analysis, algorithm prototyping, or test automation.
• Experience with Android audio pipelines or audio app development.

Who you are

You’re a self-sufficient engineer who thrives on solving complex technical problems and can quickly become productive in a fast-moving project.

You bring a mix of algorithmic insight and embedded implementation expertise, and you’re comfortable owning features end-to-end.

• Opportunity to work on cutting-edge DSP applications in wearable audio and ultrasonic tech.
• Short-term engagement, long-term impact: your work will directly influence key products in development.
• Fast-moving, focused team with minimal overhead.
• Flexible location and working hours (depending on time zone overlap).
• At our location you will find free parking slots, a canteen, and a snack buffet.