JOB TITLE: Machine Learning Engineer - ASR & Speech Recognition

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 hiring a Machine Learning Engineer specialising in Automatic Speech Recognition and real-time speech processing.*

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

*The role involves speech recognition, streaming inference, endpoint detection, speech datasets and optimisation for real-world audio conditions.*

*Detailed project information will be shared with suitable candidates subject to confidentiality requirements.*

KEY RESPONSIBILITIES

*• Research and evaluate ASR architectures.*

*• Fine-tune speech-recognition models.*

*• Build streaming ASR pipelines.*

*• Generate and improve partial transcripts.*

*• Optimise recognition for noisy and real-world audio.*

*• Develop Voice Activity Detection systems.*

*• Work on endpoint detection.*





*• Improve end-of-turn detection.*

*• Handle hesitation, silence and interrupted speech.*

*• Improve recognition of names, dates, numbers and domain-specific terminology.*

*• Work on multilingual and code-mixed speech recognition.*

*• Measure WER and CER.*

*• Develop business-critical error metrics.*

*• Measure time to first partial transcript.*

*• Measure transcript-finalisation latency.*

*• Build ASR regression datasets.*

*• Work closely with speech-data specialists.*

*• Work with infrastructure engineers on production inference.*

*• Optimise GPU utilisation and inference speed.*

REQUIRED SKILLS

*• Python*

*• PyTorch*

*• Automatic Speech Recognition*

*• Digital audio fundamentals*

*• Speech-model training/fine-tuning*

*• Streaming inference*

*• Audio preprocessing*

*• Voice Activity Detection*

*• GPU inference*

*• Linux*

*• Git*

RELEVANT TECHNOLOGIES MAY INCLUDE

*• Whisper*

*•

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