TechEval.ai Builds Hallucination-Free AI Interviewer Using LangGraph Architecture

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TechEval.ai developed an AI interviewer named Kovi for technical engineering assessments. The company chose LangGraph's state machine architecture over standard LLM wrappers to prevent conversational drift and hallucinations. The system uses separate nodes for supervision, context retrieval, question generation, and isolated evaluation to maintain objectivity. This design aims to ensure reliable scoring while supporting over 1,000 concurrent interviews with low latency.

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