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Elena(Jiyoung) Choi
Junior Software Engineer specializing in Applied AI and backend systems
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About
Full-stack/AI product engineer who has shipped both a production-style React finance app and multiple LLM-powered systems end-to-end. Particularly strong in turning early-stage AI concepts into production workflows, including a Bedrock-based multi-turn chatbot with durable session memory and a medical credentialing document parser that cut pipeline failures by 50%+ on large, messy real-world files.
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Key Strengths
- End-to-end full-stack ownership across frontend, backend, and data layer
- Strong React architecture and state management design
- TypeScript-first API and UI modeling for safe refactoring
- LLM product engineering with Bedrock and custom Nova models
- Built session-aware multi-turn chatbot systems with durable memory
- RAG pipeline and context-window management expertise
- 0-to-1 product development in high-growth startup environments
- Pragmatic speed-vs-quality decision making
- Defensive engineering around unreliable LLM outputs
- Testing discipline with unit and integration coverage for critical paths
- Document AI and medical credentialing workflow automation
- Reduced parsing pipeline failures by more than 50%
- Handled large real-world documents over 80+ pages
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