JOB TITLE:
Senior AI Engineer - LLM & Conversational AI
Company: Ethical Den
Location: Kolkata, West Bengal
Work Mode: In office only
Employment Type: Full time
Experience: 4 to 7+ years
Openings: 1
Joining: Immediate to 30 days preferred
ABOUT THE ROLE
Ethical Den is looking for a Senior AI Engineer to join our in-house AI research and product engineering team.
You will work on a confidential technology initiative involving large language models, conversational AI, model adaptation, AI agents and real-time AI systems.
This is a hands-on engineering position with technical ownership responsibilities.
We are not looking for someone whose experience is limited to prompt engineering or basic integrations with commercial AI APIs.
Detailed information about the project will be shared with shortlisted candidates at the appropriate stage of the hiring process and will be subject to confidentiality requirements.
KEY RESPONSIBILITIES
• Design and improve LLM-based AI systems.
• Evaluate suitable open-source and self-hosted language models.
• Fine-tune and adapt language models for specialised requirements.
• Develop conversational-state and contextual-memory systems.
• Design intelligent routing between different AI models and workflows.
• Build structured-output and tool-calling systems.
• Work closely with engineers developing retrieval and agent systems.
• Improve hallucination control and unsupported-answer behaviour.
• Design model evaluation and regression-testing frameworks.
• Develop reliable correction, fallback and recovery behaviour.
• Optimise responses for real-time AI applications.
• Work with inference engineers to reduce latency and compute requirements.
• Evaluate model quality against latency and infrastructure cost.
• Participate in architecture decisions and technical reviews.
• Mentor junior engineers and interns.
• Remain actively involved in coding, experimentation and debugging.
RE
📌 Senior Ai Engineer Kolkata Metropolitan Area
🏢 Ethical Den
📍 Kolkata Metropolitan Area
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