Di Liu work email
- Valid
- Valid
Di Liu personal email
► 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.
Paypal
View- Website:
- paypal.com
- Employees:
- 30222
-
Senior Data EngineerPaypal Nov 2018 - PresentShanghai, ChinaWork 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. -
Technical Project LeadPaypal Sep 2017 - Nov 2018Shanghai, ChinaLead 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 -
Data Modeler/Dimensional Modeler/Data Architect/Data Model Team LeaderHewlett-Packard May 2010 - Aug 2017799 Naxian Road ShanghaiAs 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. -
Project LeaderHewlett Packard Enterprise Aug 2005 - Apr 2010Shanghai, 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. -
Senior Software EngineeCiti Aug 2003 - Jul 2005Shanghai, ChinaBuild 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. -
Senior Software EngineeQing Dao Milkyway Electronic Technology Co.,Ltd Jul 1998 - Jul 2003Qingdao, Shandong, ChinaAs 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
Di Liu Education Details
-
Electronics And Communication System
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 District1hotmail.com -
1gmail.com
Free Chrome Extension
Find emails, phones & company data instantly
Aero Online
Your AI prospecting assistant
Select data to include:
0 records × $0.02 per record
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.
Start your free trial