DSP Software Engineer

Sonos•Boston, MA

1d•Onsite

About The Position

Sonos is seeking a DSP Software Engineer responsible for the real-time audio, DSP, and rendering software across Sonos products. This role requires expertise in signal processing, embedded systems, and software architecture, with strong proficiency in Rust, C++, and Python. The engineer will define requirements, write design documents, ensure acceptance criteria, and maintain roadmaps in coordination with cross-functional partners. Responsibilities include designing and building modular real-time audio and DSP components, integrating and optimizing machine learning models for audio workloads, and bringing in new multi-channel audio formats, codecs/decoders, and DSP algorithms. The role also involves designing hard real-time software pipelines, debugging audio routing and synchronization issues, and owning the testing and validation practice. Collaboration with acoustics, networking, hardware, application software, and audio system engineers is essential, as is setting engineering standards and mentoring other engineers.

Requirements

Master’s degree (or foreign equivalent) in Electrical Engineering, Computer Engineering, Computer Science, or Acoustic Engineering plus 2 years of experience in the offered position or related position.
Understanding of digital signal processing concepts, including filtering, sampling, latency, and numeric representation.
Experience with Rust, C++, and Python for implementing DSP algorithms, automating audio tests, and validating software.
Experience designing and validating real-time DSP audio systems for consumer electronics.
Experience with real-time systems, embedded Linux, and RTOS environments.
Experience evaluating and optimizing embedded DSP algorithms using MATLAB and Simulink.
Experience integrating and optimizing machine learning models for audio on embedded systems, including classification, enhancement, spatial processing, and ML/DSP hybrid techniques.
Knowledge of industry audio formats, codecs/decoders, and metadata, including Dolby Atmos, AAC, FLAC, Opus, OGG, MP3, and WAV.
Experience creating DSP visualization or modeling tools in C++ for real-time audio development.
Skilled in assessing and profiling end-to-end audio pipeline latency and system performance, utilizing tools that include Adobe Audition for critical listening analysis.
Experience conducting audio measurements and analysis using professional electroacoustic test equipment, including audio analyzers and oscilloscopes.
Experience developing and integrating automated audio test workflows into CI/CD systems, which include Jenkins and Docker.
Experience leading project tasks for audio system development and validation, and coordinating team efforts for software feature delivery.

Responsibilities

Responsible for the real-time audio, DSP, and rendering software across Sonos products.
Define requirements, write design documents, ensure acceptance criteria, and maintain roadmaps in coordination with cross-functional partners.
Design and build modular real-time audio and DSP components in Rust and C++.
Integrate and optimize machine learning models for audio workloads covering classification, enhancement and spatial processing on embedded platforms.
Bring in new multi-channel audio formats, codecs/decoders, and DSP algorithms.
Design hard real-time software pipelines with patterns and interfaces that work across the product family.
Debug audio routing, timing, and synchronization problems across wireless networks, cross-domain issues touching DSP algorithms, embedded RTOS/Linux systems, wireless audio transport, and hardware.
Own the testing and validation practice by building DSP simulation environments and software test frameworks in Python across diverse architectures.
Define testing strategy using GTest and Rust frameworks, and improve CI practices.
Collaborate closely with acoustics, networking, hardware, application software, and audio system engineers.
Set engineering standards and mentor engineers on the team and in partner groups.

Benefits

Medical, Dental, and Vision Insurance
A 401(k) plan with company matching and immediate vesting
An Open Time Off policy (OTO)
80 hours of sick time upon hire, refreshed annually
Up to 12 paid holidays per calendar year
Generous paid leave program for new parents or to care for a family member with a serious health condition
Short- and long-term disability for your own medical condition
Company-paid Disability, Life, and AD&D Insurance
Voluntary benefits, including Voluntary Life, AD&D, Accident, and Pet Insurance
Mental health benefits
A generous employee discount program
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