Senior Machine Learning Engineer - Automatic Speech Recognition (ASR)

Cresta is on a mission to turn every customer conversation into a competitive advantage by unlocking the true potential of the contact center. The company is looking for a Senior Machine Learning Engineer to advance model evaluation, measurement, and quality improvements, with particular emphasis on Automatic Speech Recognition (ASR) and downstream NLP systems.

Requirements

• Design, implement, and maintain evaluation frameworks to measure model accuracy, robustness, latency, and real-world performance across ASR and NLP systems.
• Lead ASR quality improvement efforts, including error analysis, dataset curation, metric definition (e.g., WER and task-specific metrics), and model iteration.
• Analyze large-scale speech and text data to identify failure modes and drive targeted model and data improvements.
• Develop, train, and deploy machine learning models for speech recognition and downstream tasks such as classification, entity recognition, information extraction, and structured insight generation.
• Partner with applied research to translate experimental improvements into production-ready systems.
• Collaborate with product managers, platform engineers, and UX teams to align model quality metrics with customer and business goals.
• Optimize ML pipelines and evaluation workflows to operate efficiently and reliably at scale.
• Establish best practices for model validation, offline/online evaluation, and continuous quality monitoring in production.

Benefits

• Comprehensive medical, dental, and vision coverage
• Flexible PTO
• Paid parental leave
• Retirement savings plan
• Remote work setup budget
• Monthly wellness and communication stipend
• In-office meal program
• Commuter benefits