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Himangshu Das
Staff Software Engineer / Technical Architect specializing in cloud data platforms and GenAI agents
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Small-team builder of Promethium’s “Mantra” next-gen agentic text-to-SQL engine, using vector DB + LangGraph tooling and SQL validation/evaluation to improve query accuracy. Experienced in diagnosing production LLM workflow failures via LangSmith traces and in running hands-on developer workshops and pre-sales POCs with live debugging and real customer data.
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Key Strengths
- Built agentic text-to-SQL system from prototype to production in a 4-person team
- Design-review-first collaboration with clear ownership and tight feedback loops
- Systematic real-time debugging using trace tooling (LangSmith) and stage-by-stage isolation
- Improved SQL accuracy by restructuring vector-store context to be user-group specific
- Strong technical demo/workshop delivery: architecture-first, real APIs, real-world messy data, live debugging
- Effective pre-sales/POC partnership: tailored demos, addressed objections (hallucinations, trust, security, stability), created repeatable adoption guide
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