Staff AI Research Engineer
Core
Develop and train custom speech models (ASR, TTS, speech-to-speech) and large-scale neural networks to understand non-native learner speech for Duolingo's Video Call and learning path features.
Role type
Staff AI Research Engineer (Speech)
Builds
Custom speech models and large-scale neural network models for education products
Domain
Education technology + Speech AI
Deliverable
production ML models
Required skills
Speech modeling (ASR, TTS, speech-to-speech), audio tokenization, large model training and fine-tuning, reinforcement learning, feature engineering, training data development, model deployment and monitoring
Preferred skills
Experience with LLMs, strategic product decision making, team mentorship
Technologies
Machine learning frameworks, neural network architectures
Responsibilities
Contribute to development and training of speech models; Collaborate with cross-functional teams to align model outputs with objectives; Participate in strategic product and business decision making; Stay up-to-date with latest ML developments in speech; Mentor team members; Ensure delivery of high-quality, scalable ML solutions
