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Tianrui Liu Email & Phone Number

Machine learning (software) engineer | recommender system, information retrieval, NLP, LLM at eBay

Location: San Francisco Bay Area, United States, United States 5 work roles 2 schools

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✓ Verified May 2026 3 data sources Profile completeness 100%

Current company

eBay

Role

Machine learning (software) engineer | recommender system, information retrieval, NLP, LLM

Location

San Francisco Bay Area, United States, United States

Company size

24718 employees

Who is Tianrui Liu? Overview

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Quick answer

Tianrui Liu is listed as Machine learning (software) engineer | recommender system, information retrieval, NLP, LLM at eBay, a company with 24718 employees, based in San Francisco Bay Area, United States, United States. AeroLeads shows a matched LinkedIn profile for Tianrui Liu.

Tianrui Liu previously worked as Applied researcher at Ebay and Data and applied scientist at Microsoft. Tianrui Liu holds Master'S Degree, Machine Learning And Data Science, 3.8 from Uc San Diego.

Company email context

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eBay

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Profile bio

About Tianrui Liu

I am a passionate and skilled software engineer specializing in machine learning. My expertise and interests are centered around the intersection of machine learning and data systems, including recommender systems, information retrieval (modern search engines), data systems for ML, personalized information feeds, risk assessment and natural language processing.🚀 Core Strengths:1. Recommender Systems Expertise: I am particularly adept in recommendation and search systems, boasting a deep and comprehensive understanding that spans both industry practices and academic frontiers.2. End-to-End System Development: I have experience in building recommendation systems from the ground up. This includes a holistic approach including modeling, data engineering, and system design, backend development, ensuring a robust and efficient system architecture.3. Great Analytical Skills: I excel in analyzing complex systems, identifying areas for improvement, and transforming intricate issues into practical solutions.

Listed skills include Information Retrieval, Bert, Git, Mongodb, and 21 others.

Current workplace

Tianrui Liu's current company

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Ebay

Machine learning (software) engineer | recommender system, information retrieval, NLP, LLM

san jose, california, united states

Website

ebayinc.com

Employees

24718

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Company profile

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5 roles

Tianrui Liu work experience

A career timeline built from the work history available for this profile.

Applied Researcher

Current

Ebay

United States

Oct 2024 - Present

Data And Applied Scientist

Microsoft

Seattle, Washington, United States

Hired via Centific, worked on azure escalation virtual agent project. - Employed a prompt-engineering based method for agent manual review data curation on Azure.- Proposed the idea of auto-evaluating reactivation requests. Built a prototype that reached human-level accuracy on 40-60% coverage.

Apr 2024 - Oct 2024

Software Engineer (Machine Learning)

Stubhub

Irvine, California, United States

work on recommendation and listing value in core experience recommendation team
Played a key role in the core experience recommendation team for establishing the StubHub recommendation service, offering insights throughout the development lifecycle.
Designed a ML model that personalizes based on user profile, location and time context information and category features, which contains a rule-based candidate generator for coarse retrieval, a wide-and-deep ranker for.
Built the first StubHub real-time recommendation service by developing a data ETL, model training and serving pipeline with Snowflake and PyTorch. Implemented a machine learning inference service based on ONNX runtime.
Designed a solution for estimating seat quality score incorporating both history transaction and venue geometry, which increases the coverage by 20% and leads to a 2% CVR increase in A/B test.

Apr 2023 - Apr 2024

Research Assistant

Uc San Diego

- Conducted research on neural operator- Designed machine learning algorithms for solving complex partial differential equations

Nov 2021 - Apr 2022

Research Intern

University Of Illinois Urbana-Champaign

Robust Rumor Detection with Joint Representations- Proposed a novel framework to combine tweet propagation trees with heterogeneous tweet-user graph, achieve 86.5% accuracy in classification tasks, which outperformed state-of-the-art baselines. Paper submitted to a top conference.- Established a pipeline for Twitter raw data retrieval and processing.

May 2020 - Oct 2020

Team & coworkers

Colleagues at eBay

Other employees you can reach at ebayinc.com. View company contacts for 24718 employees →

MS

Michael Steinbach Colleague at Ebay Berlin, Berlin, Germany, Germany View → JN

Julia Nisted Colleague at Ebay Zurich, Switzerland, Switzerland View → MA

Mohammed Al Zubaidi Colleague at Ebay Jacksonville, Florida, United States, United States View → JM

Jana Marcy Colleague at Ebay Draper, Utah, United States, United States View → HH

Haho Haha Colleague at Ebay Hong Kong, Hong Kong SAR, Hong Kong View → SR

Sakshi Rani Colleague at Ebay Patiala, Punjab, India, India View → AA

Aa Aa Colleague at Ebay San Jose, California, United States, United States View → RS

Richard Stapleton Colleague at Ebay Luton, England, United Kingdom, United Kingdom View → CP

Clarrissa Payne Colleague at Ebay United States, United States View → JH

Joseph Huang Colleague at Ebay San Jose, California, United States, United States View →

2 education records

Tianrui Liu education

Master'S Degree, Machine Learning And Data Science, 3.8

Uc San Diego

Enrolled as a PhD student with department fellowship 2021-2022 Courses: · Programming for data analysis · Prob & stats for data science ·.

Bachelor, Electronic Information Engineering, 3.87/4

Zhejiang University

Activities and Societies: minor in Advanced honor class of engineering education (ACEE)(40/6000) · Provincial scholarships (5%) ·.

FAQ

Frequently asked questions about Tianrui Liu

Quick answers generated from the profile data available on this page.

What company does Tianrui Liu work for?

Tianrui Liu works for eBay.

What is Tianrui Liu's role at eBay?

Tianrui Liu is listed as Machine learning (software) engineer | recommender system, information retrieval, NLP, LLM at eBay.

Where is Tianrui Liu based?

Tianrui Liu is based in San Francisco Bay Area, United States, United States while working with eBay.

What companies has Tianrui Liu worked for?

Tianrui Liu has worked for Ebay, Microsoft, Stubhub, Uc San Diego, and University Of Illinois Urbana-Champaign.

Who are Tianrui Liu's colleagues at eBay?

Tianrui Liu's colleagues at eBay include Michael Steinbach, Julia Nisted, Mohammed Al Zubaidi, Jana Marcy, and Haho Haha.

How can I contact Tianrui Liu?

You can use AeroLeads to view verified contact signals for Tianrui Liu at eBay, including work email, phone, and LinkedIn data when available.

What schools did Tianrui Liu attend?

Tianrui Liu holds Master'S Degree, Machine Learning And Data Science, 3.8 from Uc San Diego.

What skills is Tianrui Liu known for?

Tianrui Liu is listed with skills including Information Retrieval, Bert, Git, Mongodb, Tensorflow, Partial Differential Equations, Apache Kafka, and Snowflake.

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