Data Science

Kathy Chang

**************@*****.*** 669-***-**** 1922 Nevets ln, San Jose, CA 95133

github.com/NTCHANG1289 www.linkedin.com/in/naitan-chang PROFESSIONAL SUMMARY

A Data Scientist with 2-year master degree in data science and 5 years of experience in reinsurance industry. An active learner and python programmer who specializes in building ETL pipelines, data modeling, big data management with Hadoop and Spark, data visualization and quantitative fields. A Dec. 2019 graduate of Worcester Polytechnic Institute interested in machine learning, data engineering, and system design. PROFESSIONAL SKILLS

• Building data pipelines

• Machine learning and Data Modeling

• Big Data Management (MapReduce)

• Working with and Analyzing Data

• Data Visualization

• Communication

Work Experiences

Waters Corporation (Milford, MA) 08/2019 – 12/2019 An analytical laboratory instrument and software company with 7000 employees and $2.4 billions in revenues with business ranging from analytical system solutions, software, and services for scientists. Data Scientist (co-op)

Anomaly Detection targeting abnormal user behavior in pharmaceutical tests

• Build data pipelines: Built an ETL pipeline to extract 50 GB data from Oracle database and transformed and cleaned the data to readable format in csv (SQL, Python) and explored data pattern (Pandas, pyplot)

• Machine learning and Data Modeling: Applied unsupervised machine learning methods (Auto Encoder + K- means) and time series analysis (Prophet) to detect suspicious user behavior

• Data Visualization: Built an interactive dashboard showing behavior consistency and timestamps with anomalous behavior (Dash, Plotly)

Central Reinsurance Corporation (Taipei, Taiwan) 07/2012 – 12/2017 The largest reinsurance firm in Taiwan with $15.72 billions in revenues with domestic clients and international business, such as Mainland China, Japan, Korea and US. Business and Data Analyst (assistant manager)

Data analysis, actuarial, and business negotiation that brings 20% revenue to our department a year

• Working with and Analyzing Data: Evaluated insurance premium by actuarial and statistical methods with risk factors, safety margin and loss experiences

• Working with and Analyzing Data: Processing a Gigabyte insured data and project profit and loss in Excel

• Communication: Reviewed and negotiated underwriting rules of insurance products with clients

• Relationship Management: Served facultative and treaty life reinsurance business of Taiwan and foreign based insurance corporations with yearly premium income 23 million USD, which accounted for 20% premium income of the whole division

EDUCATION

Worcester Polytechnic Institute (Worcester, MA) 01/2018 – 12/2019 Master of Science in Data Science, Overall GPA: 3.55/4.0 National Chengchi University (Taipei, Taiwan) 09/2008 – 06/2012 Bachelor of Science in Risk Management and Insurance, Overall GPA: 3.4/4.0 Kathy Chang Page 2

RELEVANT PROJECTS

Distributed Local Outlier Detection on Hadoop: 11/2019 – 12/2019

§ Detected outliers using local outlier factor (LOF) in distributed systems on Hadoop

§ Optimized by data-driven LOF (DDLOF) with 6 consecutive MapReduce Airline Reservation System: 03/2019 – 05/2019

§ Designed and built an airline reservation system in Java with agile method and SDLC. Users can look up and book flight tickets on our system with designated departure/arrival airport, date, seating class, and trip type (round/one way)

Movie Review Web Application: 10/2018 – 12/2018

§ Built an interactive application with Python, JavaScript, and PostgreSQL that allows a customer to search and view information related to movies in the database. Application recommends movies to users based on key word searches, preferred genre, and customer profile Digit Recognizer: 04/2018 – 05/2018

§ Applied Logistic and Softmax algorithms in Python to build a digit recognizer to identify hand written digits

§ Trained recognizer to 98% accuracy

OTHER RELEVANT INFORMATION

Languages: English (advanced), Mandarin (native)

Computer Skills: Python, Java, SQL, NoSQL, Hadoop, Spark, MongoDB, JavaScript, A/B Testing, D3.js, R, Excel, Tableau, Linux

Certificates: Neural network and deep learning(Coursera), LOMA 280/290/307/320 Work authorization: Legally Permanent Resident (Green Card)

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