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Yang MA
Junior Backend Software Engineer specializing in search, data systems, and LLM applications
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About
Built and deployed a full-stack web product for international football fans visiting the U.S. for FIFA, owning everything from crawling and aggregating event data to frontend, backend, deployment, and maintenance. Particularly strong in data-heavy product work, using LLMs, Google Maps API, and SQL/RPC patterns to improve data quality, speed implementation, and support a polished user experience.
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Key Strengths
- end-to-end full-stack product ownership
- multi-source data aggregation and normalization
- LLM-assisted data quality evaluation
- API integration for data reliability
- backend simplification via RPC and SQL-heavy design
- database performance optimization
- test-driven development mindset
- strong UI/UX feedback during implementation
- high responsiveness to production issues
- autonomous execution aligned to leadership goals
- 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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