David Sung Email & Phone Number

Purchase, Ny, Us

● Spearheaded the enhancement of Mastercard's Smart Authentication model within the EMV 3-D Secure authentication system, significantly improving security and user experience. Utilized my expertise in Python, SQL, and data visualization to analyze data trends and inform project direction.● Led a cross-functional team through the entire project lifecycle, from initial planning and charter development to successful closure. Applied comprehensive project management methodologies to ensure seamless execution, including rigorous planning, risk management, stakeholder engagement, and adherence to quality standards.● Addressed and rectified regional model variations by implementing region-specific data validation and labeling strategies. This initiative markedly increased the model's effectiveness and adaptability across diverse markets including NAM, AP/MEA, EUR, and LAC regions, thereby elevating global customer satisfaction.● Oversaw the project closure phase, meticulously documenting key findings and best practices. My leadership in ensuring a smooth transition and handover process underscored Mastercard’s dedication to fostering innovation and delivering exceptional value to customers worldwide.

Purchase, Ny, Us

● Spearheaded the Smart Authentication Airflow Project, enhancing operational efficiency through the automation of data reporting processes. Managed and executed over 30 diverse DI (Card Authorization Model) work requests to optimize workflows and enhance customer satisfaction across credit and debit card transactions.● Led the development of automation scripts for anomaly detection in Mastercard's Smart Authentication System (Card Authentication Model). Utilized a statistical approach to calculate the 7-day moving average and identify outliers when score distribution was outside of 1.5 standard deviations, essential for monitoring smart authentication score distribution across various regions. Generated detailed Excel reports for product teams with merchant names, IP addresses, transaction amounts, and other relevant information to analyze the root causes of outlier score distributions.● Developed ML models using XGBoost and Python, enhancing fraud detection accuracy in Mastercard’s Decision Intelligence (DI) Model for all card transactions to 92% and reducing false positives by 15%. Key in improving fraud detection across both credit and debit card transactions.● Introduced POCs to customers using blind data from production servers to showcase model efficacy in fraud detection. Conducted model refreshes when performance declined, updating models with the latest data without altering features and fine-tuning performance weights. Rebuilt fraud detection models with new features upon significant changes in customer spending behavior.

Redwood City, Ca, Us

● Built next generation data-monitoring tools to monitor the health status of different Hadoop clusters; report data node volume failures; report data pipeline tools, such as Kafka, Spark, and Gobblin anomalies; and take corrective action if anything went wrong in the data infrastructure.● Built data pipelines to efficiently and reliably move data across the infrastructure.● Streamlined operations for data infrastructure management by automating routine tasks; cleaning out space, and organizing a list of tables and schemas on the MySQL servers in preparation to migrate Spark/Hive jobs onto the cloud.

● Expanded the use of Intel’s tool chain by using Python to perform memory margining at scale (~12.9GB of data) for the 1-socket OCP (Open Compute Project) and 2-socket OCP server design within Facebook’s data centers. This action affected billions of users.● Created high-signal visualization in Tableau to convey the overall quality metrics of the server design by designing Hive SQL-like queries to extract data (~12.9GB) and highlight risks. Pilot ran this methodology within Facebook’s automation framework.● Achieved Facebook’s OCP debug card validation within three weeks. This was accomplished in a short timeframe by exercising exceptional project management skills to define a test plan and forming a strategic alliance with Facebook’s hardware engineers and external ODM vendors in order to drive the project to completion.

Neihu District, Taipei 114, Tw

● Led the Advantech Data Center Networking and Communication Systems Launch, deploying AdvancedTCA-ATCA, MicroTCA, CPCI, and AdvancedMC–AMC technologies.● Initiated project by identifying key stakeholders, setting vision and objectives, and assembling a multidisciplinary team.● Developed a comprehensive project management plan, defining KPIs for scope, schedule, and cost, and established a communication strategy.● Managed execution with a focus on quality standards, risk management, and stakeholder engagement, ensuring alignment with strategic goals.● Enhanced British Telecom's system performance by 80% in 2016 through firmware enhancement leveraging Intel DPDK, saving a $25 million contract.● Concluded the project with a structured close-out, team transition, and documentation of key learnings and achievements.

West Lafayette, In, Us

● Worked with Dr. Janes’ group to research rapid detection of bacteria using a biochip and improved its performance time from 7 days to 3 hours or less.● Presented poster: “Impedance detection of bacteria using hollow fiber,” USDA/ARS 10th Annual Research Planning Workshop.● Researched potential applications of nanowire on the biological interaction of a charged peptide and compared its performance with gallium arsenide junction-field-effect transistors.

Bonn, De

● Assisted Dr. Pascal Ifeacho in conducting research and creating a computer model for synthesizing a WO3/AL2O mixed oxide in doped premixed H2/O2/Ar flame as part of the Research Internship in Science and Engineering (RISE) at University of Duisburg-Essen.

Master Of Science (M.S.), Software Engineering And Business Management

Master Of Science (M.S.), Electrical And Computer Engineering

Bachelor Of Science (B.S.), Major: Electrical And Computer Engineering, Minor: Mathematics