The Acoustics ML and DSP Engineer role at Apple focuses on innovating and improving voice processing features and algorithms for Apple devices. This position is part of the Audio System Tuning team, which aims to enhance customer experiences through high-quality sound. The engineer will develop, tune, and ship machine learning and digital signal processing algorithms for voice audio across various platforms. This hands-on role involves taking algorithms from prototype to production, ensuring clear and natural communication for users.

• MS with 3+ years of relevant experience, or PhD, in Acoustics, Audio, Electrical Engineering, Computer Science or a related field.
• Solid grasp of acoustics and signal processing fundamentals.
• Experience shipping audio or speech enhancement ML algorithms from prototype to production.
• Proficiency with PyTorch and Python, including version control, testing and reproducible experiments.
• Working knowledge of Max/MSP for real-time audio prototyping.
• Experience with causal, streaming models under real-time latency and compute constraints.
• Experience using, and where needed building, large-scale data and cloud training pipelines, including preprocessing and data simulation.
• Working knowledge of speech quality evaluation: objective metrics, telephony quality and echo performance measures, and subjective listening tests.
• Understanding of the state of the art in speech processing and adjacent fields.
• Strong coding and debugging skills (Python and C/C++), plus MATLAB for analysis.

• Develop new speech enhancement algorithms that combine machine learning and DSP.
• Take algorithms from prototype to production on Apple devices.
• Tune, optimize and listen to algorithms, debugging issues by tracing them to the data, the model or the signal chain.
• Improve voice quality and intelligibility for telephony and voice calls in challenging conditions.
• Measure the effect of front-end processing on telephony quality and machine listening applications.
• Follow the state of the art in speech processing and adjacent fields.
• Work cross-functionally with tuning, DSP and audio ML colleagues within the team.
• Collaborate with partners across the hardware and software organizations.

• Employees at Apple are often offered comprehensive benefits that support physical and mental well-being—flexible medical plans, confidential counseling, onsite wellness centers at major campuses, and resources for fitness and daily life. Families typically receive fertility support, paid parental leave with gradual return, caregiving leave, and dependent-care guidance, while financial perks commonly include stock grants (with purchase discounts), 401(k) matching, and income-protection coverage. Employees also see robust time off, Apple University learning and tuition reimbursement, donation matching and paid volunteer hours, and deep product and partner discounts.