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Ofek Shaltiel
Mid-Level Full-Stack Software Engineer specializing in AI-enabled web platforms
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About
Backend/AI engineer in construction tech (HyperWater AI) who delivered major production performance wins (analytics API from ~1 hour to 0.5s) and shipped LLM features for parsing subcontractor manifests into CSI divisions with human-in-the-loop review. Also built a freelance agentic document-verification system using OCR + RAG over pgvector with robust retry/escalation logic and user feedback loops.
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Key Strengths
- Reduced analytics endpoint runtime from ~1 hour (502s/crashes) to ~0.5s by eliminating N+1 queries and optimizing data transforms
- End-to-end ownership of LLM-powered Excel/subcontractor manifest parsing feature (upload → parsing API → OpenAI call)
- Cut LLM request volume and cost ~80% via bulk aggregation and model selection (GPT-5 mini)
- Designed multi-agent workflow with OCR + planning agent + RAG verification using pgvector, with retries/exponential backoff and human escalation
- Improved bulk subcontractor ingestion performance from 50 minutes to 25 minutes for ~5,000 companies via bulk/parallel record creation
- Production-minded operations: monitoring/alerting (CloudWatch/Sentry/LogRocket), QA scoring of model accuracy, and fallbacks (Redis-to-DB)
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