Machine Learning Engineer, Speech - Joint Audio-Video Modeling

About Cantina: Cantina Labs is a social AI company, developing a suite of advanced real-time models that push the boundaries of expression, personality, and realism. We bring characters to life, transforming how people tell stories, connect, and create. We build and power ecosystems. Cantina, our flagship social AI platform, is just the beginning. If you're excited about the potential AI has to shape human creativity and social interactions, join us in building the future!   About the Role: We're looking for a Research / ML Engineer to join our Speech Team to build state-of-the-art speech and audio generation systems end-to-end from data specs through production inference with a focus on joint audio-video modeling. You'll own the audio side of multimodal generation: the representations (audio VAEs, neural codecs), the generative backbone (diffusion / flow-matching transformers), and the