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YM
Yang MA
Junior Backend Software Engineer specializing in search, data systems, and LLM applications
New York, NYBackend Software Engineer2 years experienceJuniorHealthcareHealthcare ITTechnology
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About
Built a contract and customer documentation retrieval solution for Urban Studio, designing a RAG + Elasticsearch hybrid search stack (RRF + cross-encoder reranking) with a strong emphasis on chunking/data quality and hallucination reduction. Experienced in diagnosing LLM workflow issues via observability traces and tailoring technical demos to developer concerns like reliability and high concurrency.
Experience
Backend Software EngineerBevel Health
Founding Software EngineerRouletTech Inc. (KangaCode)
Software Engineer InternRouletTech Inc. (KangaCode)
Software Engineer (Contractor)Urban Studio NYC
Software & Data EngineerUniversity of Pittsburgh
Education
University of Pittsburghmaster, Information Science (2024)
University of New South Walesbachelor, Computer Science & Engineering (2021)
Key Strengths
- Designed and delivered a RAG + Elasticsearch hybrid search system for contract/customer documentation retrieval
- Strong focus on reducing hallucinations in LLM systems
- Deep practical expertise in chunking and document preprocessing to improve retrieval quality
- Uses hybrid retrieval with RRF and cross-encoder reranking to improve relevance
- System design with scalability/cost considerations (customizable architecture; future local model hosting)
- Real-time troubleshooting approach using observability traces; can reproduce issues when tracing is absent
- Tailors technical demos to developer priorities (reliability, high concurrency) and explains tradeoffs
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