Research Engineer, Audio Understanding

About this role

Cartesia is seeking a Research Engineer to lead data strategy for multilingual AI model training. You'll design large-scale datasets, build evaluation systems, and ensure models perform well across dozens of languages while mitigating bias and improving data quality.

What you'll do

• Design and build large-scale multilingual datasets for model training with controlled experiments to measure performance impact
• Develop evaluation frameworks for speech models using both manual annotation and automated metrics at scale
• Implement data steering techniques to improve model intelligence and reduce bias
• Build automated quality control systems to validate and filter generated data
• Partner with product teams to ensure support for key languages and markets
• Guide human annotation and evaluation processes across multiple languages

What they're looking for

• Experience with large multilingual datasets
• Generative models (speech, text, or multimodal)
• Applied machine learning with data-centric focus
• Human annotation and evaluation guidance
• Scalable systems design bridging research and production
• Linguistic nuance and cultural understanding
• Data quality and bias mitigation
• Python or similar programming languages

Benefits

• Competitive base salary with equity package
• Fully covered medical, dental, and vision insurance for you and family
• Parental leave (12 weeks maternity, 9 weeks paternity)
• 401(k), commuter allowance, flexible PTO, and daily meals/snacks
• In-person collaboration in San Francisco, London, or Bangalore offices
• Visa sponsorship support available