Demo

Research Engineer, Multilingual Data

Cartesia
San Francisco, CA Full Time
POSTED ON 1/3/2026
AVAILABLE BEFORE 2/1/2026
About Cartesia

Our mission is to build the next generation of AI: ubiquitous, interactive intelligence that runs wherever you are. Today, not even the best models can continuously process and reason over a year-long stream of audio, video and text—1B text tokens, 10B audio tokens and 1T video tokens—let alone do this on-device.

We're pioneering the model architectures that will make this possible. Our founding team met as PhDs at the Stanford AI Lab, where we invented State Space Models or SSMs, a new primitive for training efficient, large-scale foundation models. Our team combines deep expertise in model innovation and systems engineering paired with a design-minded product engineering team to build and ship cutting edge models and experiences.

We're funded by leading investors at Index Ventures and Lightspeed Venture Partners, along with Factory, Conviction, A Star, General Catalyst, SV Angel, Databricks and others. We're fortunate to have the support of many amazing advisors, and 90 angels across many industries, including the world's foremost experts in AI.

About The Role

To build truly global AI, our models must be trained on data that reflects the world's diversity of languages and cultures. We are searching for a Multilingual Data Specialist to own the quality and coverage of our multi-lingual models. You will be our in-house expert on global data, ensuring our models perform exceptionally well across dozens of languages. You have a keen eye for linguistic nuance, and a passion for building inclusive and representative datasets at scale.

Your Impact

  • Design and build large-scale multilingual datasets for model training.
  • Build evaluations of multilingual speech models, both via manual annotation and at scale with automated metrics.
  • Partner with product teams to ensure support for key languages and markets.

What You Bring

  • Experience building or working with large multilingual datasets
  • Experience evaluating generative models across multiple languages.
  • Ability to help guide human annotation and evaluation across multiple languages.
  • Familiarity with the nuances of multi-lingual speech is preferred.

What We Offer

🍽 Lunch, dinner and snacks at the office.

🏥 Fully covered medical, dental, and vision insurance for employees.

🏦 401(k).

✈️ Relocation and immigration support.

🦖 Your own personal Yoshi.

Our Culture

🏢 We’re an in-person team based out of San Francisco. We love being in the office, hanging out together, and learning from each other every day.

🚢 We ship fast. All of our work is novel and cutting edge, and execution speed is paramount. We have a high bar, and we don’t sacrifice quality or design along the way.

🤝 We support each other. We have an open & inclusive culture that’s focused on giving everyone the resources they need to succeed.

Salary.com Estimation for Research Engineer, Multilingual Data in San Francisco, CA
$124,800 to $147,219
If your compensation planning software is too rigid to deploy winning incentive strategies, it’s time to find an adaptable solution. Compensation Planning
Enhance your organization's compensation strategy with salary data sets that HR and team managers can use to pay your staff right. Surveys & Data Sets

What is the career path for a Research Engineer, Multilingual Data?

Sign up to receive alerts about other jobs on the Research Engineer, Multilingual Data career path by checking the boxes next to the positions that interest you.
Income Estimation: 
$60,672 - $83,972
Income Estimation: 
$71,239 - $96,587
Income Estimation: 
$110,446 - $140,217
Income Estimation: 
$134,206 - $155,125
Income Estimation: 
$92,981 - $138,294
Income Estimation: 
$162,237 - $199,353
Income Estimation: 
$222,110 - $256,974
Income Estimation: 
$224,976 - $270,947
Income Estimation: 
$205,834 - $254,869
Income Estimation: 
$242,530 - $287,120
Income Estimation: 
$73,784 - $86,677
Income Estimation: 
$90,372 - $103,622
Income Estimation: 
$61,825 - $80,560
Income Estimation: 
$90,032 - $105,965
Income Estimation: 
$85,996 - $102,718
Income Estimation: 
$85,996 - $102,718
Income Estimation: 
$111,859 - $131,446
Income Estimation: 
$110,457 - $133,106
Income Estimation: 
$105,809 - $128,724
Income Estimation: 
$122,763 - $145,698
Income Estimation: 
$105,809 - $128,724
Income Estimation: 
$136,611 - $163,397
Income Estimation: 
$135,163 - $163,519
Income Estimation: 
$131,953 - $159,624
Income Estimation: 
$150,859 - $181,127
View Core, Job Family, and Industry Job Skills and Competency Data for more than 15,000 Job Titles Skills Library

Job openings at Cartesia

  • Cartesia San Francisco, CA
  • About Cartesia Our mission is to build the next generation of AI: ubiquitous, interactive intelligence that runs wherever you are. Today, not even the best... more
  • 16 Days Ago

  • Cartesia San Francisco, CA
  • About Cartesia Our mission is to build the next generation of AI: ubiquitous, interactive intelligence that runs wherever you are. Today, not even the best... more
  • 5 Days Ago

  • Cartesia San Francisco, CA
  • About Cartesia Our mission is to build the next generation of AI: ubiquitous, interactive intelligence that runs wherever you are. Today, not even the best... more
  • 6 Days Ago

  • Cartesia San Francisco, CA
  • About Cartesia Our mission is to build the next generation of AI: ubiquitous, interactive intelligence that runs wherever you are. Today, not even the best... more
  • 11 Days Ago


Not the job you're looking for? Here are some other Research Engineer, Multilingual Data jobs in the San Francisco, CA area that may be a better fit.

  • OpenAI San Francisco, CA
  • About The Team The Human Data team turns human feedback into reliable signals for training and evaluation. We design and run end-to-end programs that captu... more
  • 16 Days Ago

  • anthropic San Francisco, CA
  • About Anthropic Anthropic’s mission is to create reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial for our users and ... more
  • 1 Month Ago

AI Assistant is available now!

Feel free to start your new journey!