Machine Learning Engineer II, Perceptual Audio Evaluation

Crystal Equation Corporation; Redmond (WA); On-site; USD 92,000 - 99,000; Full time

Benefits offered by this job

Paid time off

Medical/dental/vision/life insurance

401K

Parental leave

Job summary

Crystal Equation Corporation in Redmond, WA is seeking a Machine Learning Engineer II focused on perceptual audio evaluation to own production ML models, inference services, and evaluation pipelines.

You’ll integrate models into internal tools, maintain always-on capacity, monitor traffic, and collaborate with audio engineers, SDEs, and researchers. A strong background in Python and PyTorch, plus audio knowledge, is required.

Qualifications

• Bachelor's degree in Computer Science, Electrical Engineering, or related technical field, or equivalent practical experience.
• Proficiency in Python and a deep-learning framework such as PyTorch.
• Knowledge of Machine Learning concepts and ML engineering practices.
• Basic knowledge of audio and signal processing.
• Ability to work independently.

Responsibilities

• Own a family of deep-learning models end to end: architecture, checkpoints, evaluation pipelines, serving infrastructure, and failure modes.
• Integrate these models into internal and XFN tools and workflows via API/endpoint integration and web UI onboarding.
• Operate always-on model inference capacity: monitor traffic, resolve throttling, tune auto-scaling, request additional capacity, redeploy, and elevate to platform owners as needed
• Run analysis and interpret model evaluations on request, apply minor bug fixes and preprocessing changes, and manage version bumps and checkpoint swaps
• Communicate with and support model users and tooling owners across various domains including audio engineers, SDEs, research scientists, TPMs etc.
• Serve as oncall for the covered services.

Skills

Python

PyTorch

ML concepts

Audio knowledge

Independent work

Education

Bachelor's degree in CS/EE or related field

Master's/PhD preferred

Tools

Internal ML platform tooling

Web front ends

Job description

Machine Learning Engineer II, Perceptual Audio Evaluation Onsite Summary Own and sustain a family of production machine learning models. Day to day responsibilities include: maintain ML models inference services and evaluation pipelines, integrate models into internal tools, and support the users and tooling owners using models.

Tech stack Python, PyTorch, Bento (Jupyter-style notebooks), internal model-serving and always-on inference capacity, REST/GraphQL-style endpoints, and a lightweight web UI.

Responsibilities

• Own a family of deep-learning models end to end: architecture, checkpoints, evaluation pipelines, serving infrastructure, and failure modes
• Integrate these models into internal and XFN tools and workflows via API/endpoint integration and web UI onboarding.
• Operate always-on model inference capacity: monitor traffic, resolve throttling, tune auto-scaling, request additional capacity, redeploy, and elevate to platform owners as needed
• Run analysis and interpret model evaluations on request, apply minor bug fixes and preprocessing changes, and manage version bumps and checkpoint swaps
• Communicate with and support model users and tooling owners across various domains including audio engineers, SDEs, research scientists, TPMs etc.
• Serve as oncall for the covered services.

Requirements

• Bachelor's degree in Computer Science, Electrical Engineering, or a related technical field, or equivalent practical experience.
• Proficiency in Python and a deep-learning framework such as PyTorch.
• Knowledge of Machine Learning concepts and ML engineering practices.
• Basic knowledge of audio and signal processing.
• Ability to work independently

Preferred Qualifications

• Master's or PhD degree in Electrical Engineering, Audio Engineering, Speech or Signal Processing, Acoustics, Computer Science, or a related technical field.
• 2+ years of hands-on experience deploying and maintaining machine learning models in production.
• Experience operating production services, including oncall, ticket queues, runbooks, access management, and escalation.
• Working familiarity with audio concepts (waveforms, sample rate, spectrograms) sufficient to sanity-check model outputs.
• Excellent communication skills with nonML audience, including audio engineers and scientists.
• Experience with internal ML platform tooling stack.
• Experience with audio, speech, or perceptual quality models (e.g. MOS prediction)
• Experience developing lightweight web front ends

Pay range is $67 - $72 per hour with full benefits available, including paid time off, medical/dental/vision/life insurance, 401K, parental leave, and more.

Benefits

• paid time off
• medical/dental/vision/life insurance
• 401K
• parental leave

Pay is based on several factors including market location and may vary depending on job-related knowledge, skills, and experience.

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