Jiahao Sun
@jiahao-sun-17791b161
Member of Technical Staff, AI Engineer @ OpusClip
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Experience
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Machine Learning Engineer
Built a Scalable Question Answering System with Agentic RAG Fusion and LLM Fine-Tuning • Leveraged LLM-based query rewriting, HyDE pre-retrieval, hybrid search (BM25 + QWEN3-Embedding + FAISS) and post-retrieval reranking via MiniLM-based cross-encoder and rule-based importance weighting, increasing 30%+ retrieval relevance • Integrated an agentic self-evaluation module that enabled LLM…
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