Di Liu

Di Liu Email and Phone Number

Senior Data Engineer @ PayPal
san jose, california, united states
Di Liu's Location
Shanghai, China, China
Di Liu's Contact Details

Di Liu personal email

n/a
About Di Liu

► Expert in Kimball Dimensional Modeling, 5 years DM experience in PayPal and 7 years DM experience in Hewlett Packard Enterprise.► Expert in SQL, , have SQL performance tuning best practices.► Rich ETL experience to pipeline big volume of data, 6 years ETL experience in PayPal and 12 years ETL experience in Hewlett Packard Enterprise.► PMP Certified, 12 years Data Warehouse Project Leader experience.► Have Large Language Model project practices. ► Excellent in inter-personal and communication skills; fluent in English, native in Mandarin.► Expert in Google Cloud Platform/Big Query/Teradata/Oracle. ► Familiar with MS SQL Server/Vertica. ► Familiar with Backend Development tool: Python/Jupyter Notebook/Boomi/UNIX Shell/Informatica/SSIS(SQL Server Integration Service)/C++. ► Familiar with Frontend Development tool: Tableau/MicroStrategy/Power BI/Business Objects/SSAS (SQL Server Analysis Service)/Qlikview. ► Familiar with Scheduling tool: Tidal/UC4.

Di Liu's Current Company Details
PayPal

Paypal

View
Senior Data Engineer
san jose, california, united states
Website:
paypal.com
Employees:
30222
Di Liu Work Experience Details
  • Paypal
    Senior Data Engineer
    Paypal Nov 2018 - Present
    Shanghai, China
    Work in Global Entity Management & Oversight-Enterprise Testing and Assurance-Data Automation team to automate testing process and find the compliance issue of business process and product to improve business process and product.The detail day-to-day work processes are:► Analyze business process(CIP/KYC, Transaction, Complaint, Dispute, Incident, PSD2, Regulation)► Analyze testing requirement(do we have exceptions in the business process or product? If yes, what are the exceptions are?)► Design dimensional model based on testing requirement. Use tool: power designer► Create table to represent the dimensional model in Big Query, Teradata or Hive.► Research the related data in the whole company in different data platform(Big Query, Teradata, Hive, Oracle, SQL Server, CSV and other format data files)► Build ETL logic to populate the dimensional model, use Jupyter Notebook+Python+SQL or Unix Shell Script+SQL or Boomi.► Build report to show the exceptional business case. Use tool: Tableau, MicroStrategy and Power BI► Schedule the ETL job and report refreshing in hourly/daily/weekly and monthly. use tool: GCP(Google Cloud Platform)/UC4Below is part of projects that I worked on: ► Complaint Quality Assurance: use Llama model to verity the quality of teammate response to customer complaint. ► CIP(Customer Identification Process)/KYC(Know Your Customer) testing and monitoring: get the exceptional case of CIP verification process, such as the violation of date of birth, address and supplemental merchant information. ► Incident management: find low-ranked incident in case teammate do it purposely to avoid attention from upper-level management. ► PSD2: test the SCA(Strong Customer Authentication) factor to ensure at least 2 factors applied when doing authentication.► Employee Repopulation: after Covid-19, what’s the strategy to populate office with employee on site.► PET SLA: PayPal Escalation Tool Service Level Agreement analysis.
  • Paypal
    Technical Project Lead
    Paypal Sep 2017 - Nov 2018
    Shanghai, China
    Lead GOBI(Global Operation Business Intelligence) migration and transformation project (15 team members). As the first project Pactera served for Paypal, and I am the first employee who onboarded as Technical Project Lead role. My responsibility includes below: ► Coordinate with Paypal product owner who based in US. Understand the requirement and implement with team members. ► Hire new team members, the roles include business analyst, data architecture, ETL developer and report developer. ► Be familiar with Paypal technical architecture ASAP and guide team members do development.► Research the solution for technical and business problem and enhancements. ► Manage the project using agile practice. During GOBI migration phase, we migrated 45 Subject Areas, 1100 tables, 450 final tables, and the technical work includes below: ► Migrate application from windows to unix. ► Replace windows job scheduling with UC4 Automation Engine. ► Replace windows .bat with UC4 job plan. ► Replace windows fast load script to UNIX one. ► Adapt the long GOBI .sql with EDW standard. ► Transfer SSIS package into Teradata BTEQ Script to perform ETL work. ► Replace some common windows .vbs tools with UNIX shell script: ► File exception checking ► csv to html converter ► Send mail with/without attachment. ► Testing to make sure the migrated ETL can produce the same result with original GOBI. During GOBI Transformation phase, we do below features with the guidance of EDW standards: ► Integrate dimension extension table into EDW dimension table (work item queue extension, employee extension…) ► Update RCR (ReContact Rate) facts to include Live Chat, not only email and phone. ► Include new Avaya instance in outbound calls ► Money Transfers Data Model Refinements ► Call back measure
  • Hewlett-Packard
    Data Modeler/Dimensional Modeler/Data Architect/Data Model Team Leader
    Hewlett-Packard May 2010 - Aug 2017
    799 Naxian Road Shanghai
    As a team leader of data model team, I develop data model guidance and standard, review data model and Source to Target Mapping document, coordinate work in data model team and coordinate work with ETL team and reporting team.As a data modeler, I analyze the requirement, design logical and physical model, design DB structure, generate DDL script, write Source to Target Mapping document. Below are the features that I build data model for:HPSM (HP Service Manager) ASTA(Application Security Track and Audit) Application Health Check by measuring incident/eRFC/problem/application availabilityOperationalize the DepotPC UsagePC Order StatusIT Security TrainingSupport ProductivityCyber Security GDBA Patch ManagementPC Client patch managementetc.I also do informatica ETL development and Qlikview report development. From this role, I built up Data Model skill, Project Management skill, business analysis skill, Informatica skill and Qlikview skill.
  • Hewlett Packard Enterprise
    Project Leader
    Hewlett Packard Enterprise Aug 2005 - Apr 2010
    Shanghai, China
    ► Level 4 support of BI Application FDWe(Finance Data Warehouse EMEA):If there is issue which need to change code, then my team is responsible for finding the root cause and doing bug fixing. If new enhancement come, my team is responsible for Design/Development/Testing and Implementation. During this project, because of the big data volume and long time running of this application (10 years), I acquired a lot of Oracle performance tuning best practices. ► DTS-SSIS migration project:We migrated 215 packages during 2 months by 3 engineers.During this project, in technical area, I contributed a reusable oracle package to decrease the testing time from 1 day/package to 0.5 Hour/package.In project management area, I collected DTS-SSIS migration effort metrics to help future project to do better effort estimation for similar project. ► eBI(Enterprise Business Intelligence) project:In this project, my main role is leading BO(Business Object) team enrich new features into eBI and support existing features. I also develop BO universe, Webi and crystal reports. ► Formula Project: As the Project Leader, I lead team member do SSIS/SSAS development.► Qlikview developer of Sales operation configure/price/quote.
  • Citi
    Senior Software Enginee
    Citi Aug 2003 - Jul 2005
    Shanghai, China
    Build up new data warehousing team in Shanghai office, Train new hire, drive the whole team development process, and coordinate with Singapore DW Team as well.
  • Qing Dao Milkyway Electronic Technology Co.,Ltd
    Senior Software Enginee
    Qing Dao Milkyway Electronic Technology Co.,Ltd Jul 1998 - Jul 2003
    Qingdao, Shandong, China
    As the team leader of database group in BI application (Business Intelligence Analysis In TeleComm Network) development, I guide team member to complete data warehouse analysis, building, maintenance and performance tuning. As the project manager in BI application (Price Rival Decision Support System), I guide team members to do development and maintenance. Participant in development of below MIS systems: ► (HMS) Hotel Management System. ► (TMS) Ticket Management System. ► (PPOMS) Power Plant Operation Management System. ► (AEB) Architecture Engineering Budget.

Di Liu Skills

Management Team Leadership Business Development Analysis Operations Management Business Strategy Teamwork Marketing English Strategy Patience Quick Learner Hard Working Data Modeling Data Architecture Data Warehousing Business Intelligence Databases Oracle Informatica Pmp Pl/sql Sql Business Objects Project Management

Di Liu Education Details

Frequently Asked Questions about Di Liu

What company does Di Liu work for?

Di Liu works for Paypal

What is Di Liu's role at the current company?

Di Liu's current role is Senior Data Engineer.

What is Di Liu's email address?

Di Liu's email address is ld****@****ina.com

What schools did Di Liu attend?

Di Liu attended Shandong University.

What skills is Di Liu known for?

Di Liu has skills like Management, Team Leadership, Business Development, Analysis, Operations Management, Business Strategy, Teamwork, Marketing, English, Strategy, Patience, Quick Learner.

Who are Di Liu's colleagues?

Di Liu's colleagues are Olaf Schweidler, Moses Macharia, Vinay Narang, Paulette P., Christopher Cothren, Scott Riley, Vinay Kumar Reddy Perolla.

Not the Di Liu you were looking for?

  • Di Liu

    Focus On Globalization Of Chinese Intelligent Manufacturing Brand, Breaking The Culture Barrier.
    Chaoyang District
    1
    hotmail.com
  • Di Liu

    Healthcare Venture Capital
    Beijing, China
  • DI LIU

    External Affairs At Tesla
    Chaoyang District
    1
    gmail.com
  • Di Liu

    Hpc With Data Science | Software Engineer | Msc @ University Of Edinburgh 2020
    Shanghai, China
  • Di Liu

    Product Manager
    China

Free Chrome Extension

Find emails, phones & company data instantly

Find verified emails from LinkedIn profiles
Get direct phone numbers & mobile contacts
Access company data & employee information
Works directly on LinkedIn - no copy/paste needed
Get Chrome Extension - Free

Aero Online

Your AI prospecting assistant

Download 750 million emails and 100 million phone numbers

Access emails and phone numbers of over 750 million business users. Instantly download verified profiles using 20+ filters, including location, job title, company, function, and industry.