Job Details

Researcher, Post-Training

  2025-09-04     MetaVoice     San Francisco,CA  
Description:

MetaVoice is building AI for voice conversations that feels just like talking to a human.

Voice AI today cannot holdreal conversations. It requires walkie-talkie style turns, lacks empathy and has an inconsistent personality.

Developers are unable to build long-form experiences out of the box and users disengage. This limits voice AI to simple receptionist tasks and basic customer support, blocking high-value use cases (therapy, coaching, sales) where fluid dialogue and emotional intelligence matter most.

Scaling current tech will not solve this.

Our solution is a duplex speech-to-speech AI for developers, designed to feel just like talking to a human.

Who we are

MetaVoice was founded by:

  • Sid, founding engineer at Wayve.ai (raised $1Bn+)
  • Vatsal, co-created Alexa's first deep learning voice.

We're a small mission-driven team obsessed with making voice the most natural way to interact with AI. We're backed by top tier US and European VCs and angels including co-founder of Wayve.ai, ex-VP of Twitter, ex-CTO of CoinBase

Requirements & Experience

  • PhD in ML or related field, with publications in top conferences.
  • 1+ yrs of experience in training LLM / diffusion / flow-matching on 1B+ param models OR training SOTA speech models.
  • Experience with post-training data curation & supervised fine-tuning of pre-trained models.
  • Experience designing & building evaluation workflows: automated or human-in-the-loop.
  • [bonus] Early-stage startup experience.

What we offer

  • Change the world (when we succeed)
  • Environment to do the best work of your life.
  • Talent dense team, great people.
  • Opportunity to make cutting-edge research work from scratch for production scenarios.
  • Work with 100+ TBs of data and 10B+ parameter models.

Culture

  • We're building an in-person team in San Francisco. We love working together – it helps us learn from one another and move faster.
  • We ship fast & obsess over making customers happy.
  • We offer high autonomy, allowing everyone to do their best work.

Compensation & Benefits

  • Significant equity as a founding team member.
  • $180K-$300K base.
  • Fully covered medical, dental, and vision insurance.
  • 401(k)
  • Immigration support, we are immigrants ourselves.

Interview Process

We move with speed, and aim to go from first interview to offer within a week.

  • Short 15 mins chat with one of the founders
  • 2 technical interviews
  • 2x culture interview with co-founders
  • Paid "work together" session
  • Offer


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