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

We are leaders in acoustic solutions based on MEMS speakers by 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 with a proven track record in TWS earbuds audio DSP development to join us for a 3-4 month project. This role is highly focused on real-time audio and ultrasonic algorithm implementation for TWS earbuds, with direct hands-on DSP firmware development for TWS platforms. It is best suited for someone who is independent, technically strong, and able to contribute quickly with minimal ramp-up. 

Experience with the WuQi TWS platform is especially valuable, and will be considered a strong differentiator.

Technical Expertise

Personal Evolution

Autonomy

Responsibilities

• Design, implement, and optimize real-time audio/ultrasound DSP algorithms for TWS earbuds on the WuQi TWS platform.
• Develop and maintain embedded C firmware for DSP-enabled microcontrollers used in TWS audio pipelines.
• Collaborate with hardware and software engineers to integrate and validate algorithms on production earbuds.
• Debug and troubleshoot system-level issues across firmware, hardware, and audio 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 

• >5 years experience with DSP development in audio applications, with specific focus on TWS earbuds.
• Strong hands-on skills in Embedded C for real-time, low-power systems.
• Deep knowledge of audio DSP fundamentals, algorithms, and real-time constraints.
• Proven ability to troubleshoot and optimize audio DSP pipelines.
• Fluent in English, with strong problem-solving skills.

Bonus Skills

• Direct experience with the WuQi TWS platform (SDKs, development tools, debugging).
• Familiarity with Bluetooth audio / True Wireless Stereo (TWS) systems.
• Python for signal analysis, prototyping, or test automation.
• Knowledge of Android audio pipelines or related app integration.

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.