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Avantik Tiwari
Junior Data Scientist / Big Data Engineer specializing in ML, LLMs, and analytics platforms
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About
Backend/data platform engineer who led a major redesign of a hybrid streaming+batch analytics platform processing 10+ TB/day (Airflow/Hive/BigQuery) with strong data-quality automation. Also built a production RAG PDF assistant with concrete mitigations for hallucinations and prompt injection (re-ranking, grounding, verifier step) and has deep experience executing low-risk migrations (dual-write, blue-green, rapid rollback) and implementing JWT-based row-level security.
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Key Strengths
- Designed and scaled a data platform ingesting/processing 10+ TB per day for analytics and ML
- Strong architectural tradeoff judgment (latency vs cost; streaming vs batch) with stakeholder alignment
- Production-grade API engineering in Python/FastAPI (async, caching, observability, CI/CD, canary deploys)
- Built a RAG PDF assistant with layered defenses against hallucinations and prompt injection (grounding, re-ranking, verification)
- Led high-safety backend migration using expand/contract, dual writes, checksums/row-level validation, blue-green cutover, and fast rollback
- Implemented fine-grained auth and row-level security using JWT claims and database policies for multi-tenant systems
- Proactively identified subtle edge cases (aggregation key sparsity, UI/DB race conditions) and fixed with targeted tests
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