Synthesia

Synthesia

Senior Research Engineer – Voice

USRemotePosted Today$190,000 – $270,000
Full TimeSeniorRemoteUS

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Job Description

Synthesia is the world’s leading AI video platform for business, used by over 90% of the Fortune 100. Founded in 2017, the company is headquartered in London, with offices and teams across Europe and

Key Highlights

  • Develop and evaluate streaming and speech-to-speech systems, enabling low-latency, interactive voice synthesis.
  • Adapt models for new conditioning inputs (emotion, speed, prosody, speaker control, etc.).
  • Implement post-training optimization techniques (quantization, pruning, distillation) to improve efficiency and latency in real-time speech generation.
  • Integrate and test novel architectures, such as neural codecs, diffusion, or flow-matching models, to enhance realism and responsiveness.
  • Contribute to defining new evaluation metrics for conversational speech, including latency-aware and online MOS prediction systems.

Qualifications

Preferred Qualifications

  • Experience with real-time or streaming architectures is a big plus.
  • Familiarity with state-of-the-art architectures in audio and speech generation (e.g., diffusion models, neural codecs, flow-matching models, autoregressive decoders).
  • Experience with speech-to-speech or text-to-speech (TTS) systems.
  • Evidence of original research contributions, such as publications or open-source work in top-tier venues (e.g., ICASSP, Interspeech, NeurIPS, ICML).

Skills & Technologies

PyTorchDeep Learning

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Job Details

Employment Type

Full Time

Experience Level

Senior

Salary Range

$190,000 – $270,000

Location

US

Work Mode

Remote

Posted

Today

Country

US