Machine Learning Engineer, TTS

When determining compensation, a number of factors will be considered, including skills, experience, job scope, location, and competitive compensation market data.

• Competitive salary and generous company equity

• Medical, dental, and vision insurance - 99.99% of premiums covered by Cantina

• 42 days of paid time off, including:

  • 15 PTO days

  • 10 sick days

  • 15 company holidays

  • 2 floating holidays

• Generous parental leave & fertility support

• 401(k) retirement savings plan

• Lifestyle spending account - $500/month to use however you'd like

• Complimentary lunch and snacks for in-office employees

• One Medical membership, and more!

We're looking for a Research / ML Engineer to join our Speech Team to build state-of-the-art speech systems end-to-end-from data specs through production inference. You'll drive the model ↔ data ↔ eval flywheel for TTS and adjacent tasks (voice cloning, controllable TTS, voice conversion and more), partnering closely with research, data, and infra to ship fast, reliable, and cost-aware models. In this role, you will work at the intersection of cutting-edge research and practical engineering, contributing to the development of safe, steerable, and trustworthy AI systems.

• Model Building: Architect, implement, pre-train, fine-tune, and post-train/alignment (e.g., GRPO/DPO) for large-scale speech models.

• Project Leadership: Independently lead small research projects while collaborating on larger team initiatives.

• Experimental Design: Design, run, and analyze scientific experiments to advance our understanding of the models.

• Tool Development: Develop and improve dev tooling to enhance team productivity.

• Full-Stack Contribution: Contribute to the entire stack, from low-level optimizations to high-level model design.

• Data Ownership: Define data requirements and collaborate on acquisition, curation, augmentation, labeling quality, and synthetic data strategies.

• Rigorous Evaluation: Design automated objective/subjective evaluations-listening tests, SV/WER/ASR-based metrics, robustness & bias checks, and red-team studies.

• Pipeline Delivery: Harden the training → evaluation → inference pipeline; profile latency, memory, and cost; and meet production SLAs with robust monitoring and rollback.

• GPU Scaling: Partner with infrastructure to run distributed training/inference on cloud fleets and productionize models with reliability and observability.

• Safety & Responsibility: Contribute to safety/consent guardrails and to misuse/abuse mitigation for responsible speech technology.

Cantina is a new social platform founded by Sean Parker with the most advanced AI character creator. Our bots are lifelike, social creatures that can interact wherever people are online-across voice, video, and text. Create yourself, imagine someone new, or choose from thousands of characters to share infinitely scalable, personalized content and seamless group chat.

If you're excited about how AI can shape creativity and social interaction, come help us build what's next.