Voice AI Engineer

Yum! Brands’ is hiring Machine Learning Engineers to support the development and optimization of real-time AI systems that power the Taco Bell Voice AI experience. This role will focus on speech, natural language, and infrastructure-oriented ML tasks that help ensure performance, reliability, and adaptability of deployed voice agents.

You’ll collaborate closely with MLEs, AI Engineers, and QA to fine-tune and evaluate models, improve latency, and deliver on voice AI performance standards at drive-thru scale.

Responsibilities :

Model Development & Optimization

• Train, fine-tune, and evaluate speech recognition (ASR), LLM, and NLU models
• Contribute to model monitoring, evaluation pipelines, and test harnesses
• Optimize for speed, robustness, and market variability

Deployment & Integration Support

Collaboration & Experimentation

Mandatory Skills

Preferred / good to have