Character.AI

Character.AI

Research Engineer, Multimodal

Redwood City, CA

Sponsorship not specifiedDetected 138 days ago
Cloud PlatformsDockerKubernetesMachine LearningPyTorchData EngineeringResearch

About the role

  • Your work will directly shape how millions of users experience rich, expressive, and visually compelling AI interactions every day.
  • The Multimodal team is responsible for training, fine-tuning, and deploying cutting-edge image, audio and video generation models that power Character.AI http://Character.AI's visual experiences.
  • We work across the full model lifecycle - from data pipelines and training to deployment and product integration.

Responsibilities

  • Lead fine-tuning and continued training of video generation models, including image-to-video and joint audio-visual generation.
  • Design and experiment with novel model architectures for multimodal generation, including multimodal conditioning (voice, structured text, reference images).
  • Design and build large-scale data pipelines and automated annotation workflows to support continuous model improvement.
  • As a Multimodal Research Engineer, you will own and advance our video model training efforts, including joint audio-visual generation and image-to-video.
  • You will collaborate across research, product, and infrastructure to push the boundaries of what AI-generated visuals can look and feel like at scale.

Requirements

  • Experience with distributed training tools (FSDP, DeepSpeed, etc.)
  • Experience with large-scale data processing, dataset construction, and automated data cleaning

Nice to have

  • Experience with joint audio-visual or speech-conditioned generation models
  • Experience with AIGC, video effects, character animation, or asset generation products
  • Familiarity with ML deployment and orchestration (Kubernetes, Slurm, Docker, cloud platforms)
  • Publications in relevant venues (NeurIPS, ICLR, CVPR, ECCV, ICCV, or similar)
  • ABOUT CHARACTER.AI
  • Character.AI http://Character.AI empowers people to connect, learn and tell stories through interactive entertainment.
  • Over 20 million people visit Character.AI http://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.

Benefits

  • Experience with multimodal model training, including working with audio, vision, and language modalities together
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This listing is sourced directly from Character.AI's careers page and normalized into a canonical job model.