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Navyatej Tummala
Junior Backend Engineer specializing in cloud APIs and AI-enabled systems
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Built and shipped "OnCall Copilot," a production Slack-based RAG assistant that answers on-call questions from runbooks and postmortems with citations using a FAISS vector index. Emphasizes reliability and measurable performance via strict guardrails ("no evidence, no answer"), evaluation metrics, drift monitoring, and operational hardening with Docker, logging, health checks, and offline fallback.
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Key Strengths
- Built and deployed a production Slack RAG assistant with citations (OnCall Copilot)
- Reliability-focused LLM system design (confidence thresholds, required citations, abstain behavior)
- Strong handling of messy source data (cleaning, chunking heuristics, metadata)
- Performance and stability optimization (top-k/context tuning, offline fallback, Docker, logging, health checks)
- Evaluation-driven development (labeled test sets, success/citation/abstain/latency/cost metrics, regression evals, drift monitoring)
- Pragmatic model/retrieval selection based on accuracy-latency-cost constraints
- Effective collaboration with non-technical stakeholders (rubrics, demos, iterative UX/prompt improvements)
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