JOB TITLE: Machine Learning Engineer - TTS & Expressive Speech

Company: Ethical Den

Location: Kolkata, West Bengal

Work Mode: In office only

Employment Type: Full-time

Experience: 2 to 5+ years

Openings: 1

Joining: Immediate to 30 days preferred

ABOUT THE ROLE

*Ethical Den is looking for a Machine Learning Engineer specialising in Text-to-Speech, speech synthesis and expressive speech generation.*

*You will join our AI research and engineering team and work on a confidential speech-technology initiative.*

*The role combines model research, fine-tuning, dataset development, speech quality and real-time inference performance.*

*Further project information will be shared with shortlisted candidates subject to confidentiality requirements.*

KEY RESPONSIBILITIES

*• Research and evaluate modern TTS architectures.*

*• Fine-tune and adapt pretrained speech models.*

*• Improve speech naturalness and pronunciation.*

*• Work on expressive and emotional speech generation.*

*• Improve prosody, rhythm, pitch, pauses and intonation.*

*• Work with multi-speaker datasets.*





*• Develop speaker-conditioning systems.*

*• Experiment with speaker embeddings.*

*• Explore lightweight model-adaptation techniques.*

*• Develop streaming speech-generation pipelines.*

*• Optimise time to first audio.*

*• Improve real-time factor.*

*• Reduce inference latency.*

*• Optimise GPU memory consumption.*

*• Design TTS evaluation frameworks.*

*• Conduct objective and subjective speech evaluation.*

*• Work closely with speech-data specialists.*

*• Work with ML systems engineers on inference optimisation.*

*• Document experiments and model-performance results.*

REQUIRED SKILLS

*• Python*

*• PyTorch*

*• Deep Learning*

*• Audio ML*

*• Speech processing*

*• TTS training and fine-tuning*

*• Audio preprocessing*

*• PCM/WAV fundamentals*

*• Sampling rates*

*• Spectrograms*

*• GPU training*

*• Mixed precision*

*• Dataset preparation*

*• Model evaluation*

*• Linux*

*•

📌 Machine Learning Engineer (Kolkata Metropolitan Area)
🏢 Ethical Den
📍 Kolkata Metropolitan Area