Wei San Yen
Data Analyst / Engineer at 9count- Claim this Profile
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English Full professional proficiency
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Germany Elementary proficiency
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Mandarin Chinese Native or bilingual proficiency
Topline Score
Bio
Credentials
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Tableau Training for Data Science 2022
UdemyApr, 2022- Nov, 2024 -
SQL Bootcamp 2022
UdemyMar, 2022- Nov, 2024
Experience
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9count
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United States
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Technology, Information and Internet
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1 - 100 Employee
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Data Analyst / Engineer
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Aug 2022 - Present
1. Build dashboard and visualization for KPIs monitor with SQL and Tableau. 2. Define key metrics to guide business decision making and monitor users’ engagement in the product. 3. Analyze and interpret data of A/B testing and KPI trend to deliver impactful insight to the stakeholders with SQL. 4. Setup ETL jobs for data pipelines and visualization with Airflow (Python) ・From customer data / marketing analytic platform and AWS S3 to local database. ・Daily KPI dashboard and auto report to the stakeholders. 5. Collaborate closely with product manager, FE / BE engineer ・Design product experiments, analyze new features impacting, i.e. how much increasing DAU / platform revenue we have after launching new design of personal profile. ・Improve user experience, i.e. monitor if new released app get low registration rate or other engagement KPIs. 6. Coordinate with trust & safety team to monitor performance of bad actor identification ・Devise alert system with python to demonstrate weekly negative app review related to scammer. ・Analyze accuracy of user banned mechanism with bad actor report. Show less
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Deloitte
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Business Consulting and Services
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700 & Above Employee
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Senior Consultant
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Jul 2019 - Apr 2022
1. Provided risk insight to the accountants by analyzing system event log and financial data with SQL, R and Excel, helped the audit team optimize annual audit strategies. 2. Delivered data-driven reports and presentations to different stakeholders with Tableau, PowerPoint and Excel. 3. Provided ad hoc support to management for business goals, such as gross margin analysis, cost analysis, business plan presentation (mostly using statistical analysis, Python and Tableau). 4. Provided IT advisory services to listed companies with tailored suggestions for improving IT control. 5. Researcher and lecturer of SAP ERP in audit training workshop. Top 5% performance in Risk Advisory department (estimated 500 people) Show less
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National Central University
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Taiwan
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Professional Training and Coaching
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500 - 600 Employee
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C++ Programming Teaching Assistant
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Sep 2017 - Jan 2018
1. Held office hours to help students with questions. 2. Helped to prepare and grade homework assignments, midterms, and finals. 3. Helped to explain concept of machine learning model and demo with C++ programming. 1. Held office hours to help students with questions. 2. Helped to prepare and grade homework assignments, midterms, and finals. 3. Helped to explain concept of machine learning model and demo with C++ programming.
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Ministry of Economic Affairs (Taiwan)
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Taiwan
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Government Administration
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1 - 100 Employee
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Administration Assistant
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Jan 2016 - Jun 2016
Assisting government to promote Industry/Productivity 4.0 in Taiwan’s Industries, hold the meeting for industries and government. Assisting government to promote Industry/Productivity 4.0 in Taiwan’s Industries, hold the meeting for industries and government.
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Education
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2016 - 2019
國立中央大學
Master's degree, Information Management -
2018 - 2019
Fachhochschule Oberösterreich
Exchange program, Global Sales and Marketing -
2012 - 2016
國立臺灣科技大學
Bachelor's degree, Information Management
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