Dingxian W.
Leading Applied Machine Learning | Search & Recommendation, LLM
- Role
- Principal Ml Engineer, Tech Lead, Search & Recommendation at Upwork
- Location
- Seattle, WA, US
- LinkedIn followers
- 500 followers
About Dingxian W.
Dingxian is a Applied Science manager/Applied Scentist of Search org with over 12 years…
Experience
Principal Ml Engineer, Tech Lead, Search & Recommendation
May 2024 — Present · Seattle, WA, US
Generated biggest win in UFS (Upwork Freelancer Search) over the past several years.Led the transformation of UFS (Upwork Freelancer Search) ranking, overhauling the entire search stack to combine organic results and ads, and implementing a hybrid approach with multi-task learning.Successfully replaced a critical third-party ranking service with a fully in-house solution, boosting performance while reducing costs.Built a robust offline evaluation framework and introduced streamlined version control processes to enhance team collaboration and efficiency.Delivered DPO-based LLM personalization on search ranking, driving more relevant and tailored results for users.Currently spearheading LLM-based conversational search to further elevate user experience and matching capabilities.Recognized by senior leadership and showcased at board level as a strategic win in advancing ML/AI-driven improvements across the platform.
Education
East China Normal University
Master's Degree
East China Normal University
Bachelor's degree
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