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Yuan Qiu

http://QiuTedYuan.github.io/ (65) 848O 9O31
(yuan.qiu＠cnrsatcreate.sg).replace("＠","@")

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Education

Hong Kong University of Science and Technology
Ph.D. in Computer Science and Engineering [Verifiable Diploma] [PQE] [Thesis] Sept. 2019 - Aug. 2022
Supervised by Prof. Ke Yi
Hong Kong PhD Fellowship

M.Phil. in Computer Science and Engineering [Verifiable Diploma] [Thesis] Sept. 2017 - Aug. 2019
Supervised by Prof. Ke Yi
Postgraduate Studentship

B.Sc. in Math, Economics and Computer Science [Certificate] Sept. 2013 - Aug. 2017
GPA: 4.02/4.30
First Class Honors
S.S. Chern Class Outstanding Student
Academic Excellence Award
Academic Achievement Medal

Stony Brook University
International Exchange Program Sept. 2016 - Dec. 2016
GPA: 4.00/4.00

Work Experience

Research Fellow, SoC@NUS & CNRS@CREATE, Singapore. Jul. 2024 - Present
  • Keywords: Differential Privacy
Postdoctoral Fellow, CSE@HKUST, Hong Kong SAR, China. Jan. 2024 - Jun. 2024
  • Keywords: Differential Privacy, Federated Learning, Secure Multiparty Computation.
  • Researched on problems related to personalized differential privacy and federated learning.
Big Data Engineer, ByteDance, Hangzhou, China. Sept. 2022 - Sept. 2023
  • Keywords: Query Optimization, Distributed Databases, Workload Analysis.
  • Languages: C++, Java, Scala. [sample code]
  • Worked on feature development for ByteHouse, a commercial version of the ClickHouse database system.
  • Researched on cross-platform workload analysis and diagnosis, and implemented prototypes for query pattern finding and accelerating.
  • Implemented row-store feature for E-MapReduce Serveless StarRocks product.
Internship & TA
Intern Engineer, Alibaba Cloud, Hangzhou, China. April 2021 - August 2021
  • Keywords: Query Optimization, AI4DB, Data Sketching.
  • Languages: Java, Python.
  • Implemented data sketching algorithms into AnalyticDB database optimizer.
  • Researched on database optimization problems, including AI-based query optimization and adaptive query optimization through feedbacks.
Intern Engineer, Alibaba Cloud, Hangzhou, China. January 2019 - May 2019
  • Keywords: Query Optimization, Data Sketching, Approximate Query Processing.
  • Languages: Java, C++.
  • Implemented approximate query processing algorithms into AnalyticDB database optimizer.
  • Researched on cardinality estimation problems, including join size estimation and distinct value counting.
Teaching Assistant, CSE, HKUST, Hong Kong SAR, China. Fall 2017, Spring 2018, Fall 2018
  • Course: Honors Design and Analysis of Algorithms (COMP 3711H)
  • Keywords: Divide-and-Conquer, Dynamic Programming, Sorting, Graphs, etc.
  • Student Feedback Evaluations: [17F, 92.9/100][18S, 80/100][18F, 92.9/100]
Teaching Assistant, CSE, HKUST, Hong Kong SAR, China. Fall 2019, Fall 2020
  • Course: Big Data Computing (MSBD 5003)
  • Keywords: Massively Parallel Systems, Cloud Computing, Spark, etc.
Teaching Assistant, CSE, HKUST, Hong Kong SAR, China. Spring 2022
  • Course: Discrete Mathematical Tools for Computer Science (COMP 2711)
  • Keywords: Logic, Number Theory, Induction, Probabbility, etc.
Teaching Assistant, SZ-HK Collaborative Innovation Research Institude, HKUST, Hong Kong SAR, China. Summer 2022, Feb. 2022
  • Courses: Information Systems and Big Data, Basics of Cloud Computing and Big Data
  • Keywords: Cloud Computing, Spark, etc.
Teaching Assistant, Harbour Education, China. Summer 2021
  • Courses: Big Data Computing with Hadoop and Spark
  • Keywords: Cloud Computing, Hadoop, Spark, etc.
Undergraduate
Student Ambassador, Undergraduate Recruitment and Admissions Office, HKUST, Hong Kong SAR, China. Jan. 2016 - Aug. 2017
  • Prepared and participated in university events like open days and campus visits.
  • Hosted sharing sessions for prospectice students.
Math Tutor, Math Department, HKUST, Hong Kong SAR, China Oct. 2015 - Nov. 2015
  • Keywords: Linear Algebra, Probability and Statistics

Research

[DBLP] [ORCID] [Google Scholar] [Semantic Scholar]
  1. Yuan Qiu and Ke Yi. "Approximate DBSCAN under Differential Privacy." ACM SIGMOD International Conference on Management of Data (SIGMOD), June 2025.
  2. Dajun Sun, Wei Dong, Yuan Qiu and Ke Yi. "Personalized Truncation for Personalized Privacy." ACM SIGMOD International Conference on Management of Data (SIGMOD), June 2025. [PDF]
  3. Ziyue Huang, Yuan Qiu, Ke Yi and Graham Cormode. "Frequency Estimation Under Multiparty Differential Privacy: One-shot and Streaming." International Conference on Very Large Databases (VLDB), September 2022. [PDF]
  4. Yuan Qiu, Wei Dong, Ke Yi, Bin Wu and Feifei Li. "Releasing Private Data for Numerical Queries." ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD), August 2022. [PDF]
  5. Yuan Qiu, Yilei Wang, Ke Yi, Feifei Li, Bin Wu and Chaoqun Zhan. "Weighted Distinct Sampling: Cardinality Estimation for SPJ Queries." ACM SIGMOD International Conference on Management of Data (SIGMOD), June 2021. [PDF] [Full Version]
  6. Yuan Qiu, Serafeim Papadias and Ke Yi. "Streaming HyperCube: A Massively Parallel Stream Join Algorithm." International Conference on Extending DataBase Technology (EDBT), March 2019. Short paper. [PDF] [Poster]
Undergraduate Projects

Direction-based Trajectory Simplification, Undergraduate Research Opportunity Program
Supervised by Prof. Raymond Wong

WiFi Tracking and User Analytics
Supervised by Prof. Gary Chan


Skills

  • Communication: Mandarin (native), English (fluent), Japanese (N2), Cantonese (basic)
  • Programming: Java (proficient), C++ (proficient), SQL (profecient), Scala (intermediate), Python (intermediate)
  • Tools: Git, Unix, Emacs, Latex, Markdown

Awards

Hong Kong PhD Fellowship, Research Grants Council, Hong Kong Sept. 2019 - Aug. 2022
Postgraduate Studentship, HKUST Sept. 2017 - Aug. 2018
Academic Achievement Medal, HKUST [Photo] Nov. 2017
Reaching Out Award, HKSAR Government Aug. 2017
Chern Class Achievement Scholarship (Outstanding), Math Department, HKUST [Link] Jul. 2017
First Runner-up in UG Math Competition, Math Department, HKUST [Certificate] May 2016
Epsilon Fund Award, Math Department, HKUST [Certificate] May 2016
The Cheng Foundation Scholarship, Cheng Foundation Sept. 2015 - May 2016
Kerry Holdings Limited Scholarship, Kerry Holdings Sept. 2013 - May 2015
First Prize in National Olympiad for Informatics, China Computer Federation [Certificate] Nov. 2009