Research Engineer, Applied Research

Highlights

• Advance post-training and voice AI for customer-facing agents at scale.
• Turn research breakthroughs into reliable production agent systems.
• Tackle long-horizon task execution for agents serving major global brands.

What they offer

• Flexible (unlimited) paid time off
• Medical, dental, and vision benefits for you and your family
• Life insurance and disability benefits
• Retirement plan dependent on country of employment
• Parental leave
• Fertility and family building benefits through Carrot
• Lunch, snacks and coffee
• Discretionary benefit stipend
• Eligible to participate in equity plans

Ideal candidate

Pragmatic, high-agency applied ML builder who loves turning ambiguous customer problems into elegant models and shipping them to production. Motivated by craftsmanship, velocity, and measurable real-world agent impact.

Requirements

• Strong experience building and deploying production ML and AI systems
• Excellent judgment framing product problems as ML tasks and selecting simplest effective approach
• Experience working deeply with data, experimentation, evaluation, and model iteration
• Practical, evidence-driven approach to ML
• Ability to operate with high agency and work across the stack to deliver outcomes
• Alignment with Sierra's values including Craftsmanship, Customer Obsession and Intensity
• Degree in computer science, machine learning, or related field or equivalent experience