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Character.AI

Machine Learning Infrastructure Engineer

Redwood City, California, United States

Location
Redwood City, California, United States
Work
Hybrid
Employment
Full-time
Level
Mid level
Function
Data & AI
Pay
$150K – $350K a year
Posted
18 months ago

Pay and the market here

The top of this role’s range, $350K a year, is 67% above the median of $210K for mid level data jobs in California (middle half $170K – $258K, 278 jobs that state pay).

48 data jobs open in Redwood City: 4% remote, 13 posted in the last 30 days.

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About the role

About the role

We’re looking for seasoned ML Infrastructure engineers with experience designing, building and maintaining training and serving infrastructure for ML research.

Responsibilities:

  • Provide infrastructure support to our ML research and product
  • Build tooling to diagnose cluster issues and hardware failures
  • Monitor deployments, manage experiments, and generally support our research
  • Maximize GPU allocation and utilization for both serving and training

Requirements

  • 4+ years of experience supporting the infrastructure within an ML environment
  • Experience in developing tools used to diagnose ML infrastructure problems and failures
  • Experience with cloud platforms (e.g., Compute Engine, Kubernetes, Cloud Storage)
  • Experience working with GPUs

Nice to have

  • Experience with large GPU clusters and high-performance computing/networking
  • Experience with supporting large language model training
  • Experience with ML frameworks like Pytorch/TensorFlow/JAX
  • Experience with GPU kernel development

About Character.AI

Character.AI empowers people to connect, learn and tell stories through interactive entertainment. Over 20 million people visit Character.AI every month, using our technology to supercharge their creativity and imagination. Our platform lets users engage with tens of millions of characters, enjoy unlimited conversations, and embark on infinite adventures.

In just two years, we achieved unicorn status and were honored as Google Play's AI App of the Year—a testament to our innovative technology and visionary approach.

Join us and be a part of establishing this new entertainment paradigm while shaping the future of Consumer AI!

At Character, we value diversity and welcome applicants from all backgrounds. As an equal opportunity employer, we firmly uphold a non-discrimination policy based on race, religion, national origin, gender, sexual orientation, age, veteran status, or disability. Your unique perspectives are vital to our success.

Source

Posted by Character.AI on their own hiring page, jobs.ashbyhq.com. OptiTalent shows it as published, read 07 Nov 2026 11:47 UTC; the original is the reference.

View the original ad ↗

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