JOB TITLE:
Senior AI Engineer - LLM & Conversational AI

Company: Ethical Den

Location: Kolkata, West Bengal

Work Mode: On-site 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