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 contemporary 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

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