Wing Tsui Email & Phone Number

Seattle Area, Washington, Us

- Led a team of engineers responsible for the payment lifecycle of advertisers. Led cross-engineering and cross-functional teams in managing user experience, risk, and business growth.- Developed and delivered a coupon system for advertisers, working with Finance and Sales to support the reporting and auditing requirements on the system.- Continued to improve payment efficiency, operational costs, and user experience on the payment platform.- Drove cross-functional team efforts on detecting and addressing fraudulent advertisers and payments, securing the payment system from potential internal tempering, and meeting revenue reporting and auditing requirements.- Advocated for better engineering by creating goals to measure engineering excellence and holding the team accountable

- Tech led a team of 3 to design and build a scalable recurring payment platform that supports multiple products, allowing fast onboarding of new products onto the platform, enabling high reliability of payments, and providing critical monitoring and alerting capabilities.- Responsible for running multiple experiments on the recurring payment platform to improve payment efficiency, system reliability and operational cost. Defined hypotheses and goals, created and implemented the experiments, gathered data and performed analysis on the resulting data.- Owned the payment lifecycle of advertisers. Worked with product management, Finance and Business teams to design and create various features that allow advertisers to pay for their campaigns.

Redmond, Washington, Us

Microsoft Windows Phone- Leading a team of developers in designing the architecture and implementing a highly scalable and reliable user-centric system- Overseeing the development team to ensure high quality work is delivered on time according to spec and requirements- Engaging in planning and scheduling of team resources to deliver feature work while maintaining work-life balance- Leading a virtual team to drive efforts around data partitioning and deployment

Redmond, Washington, Us

Microsoft Windows Phone- Designed the architecture of the Windows Phone consumer marketplace for reliability and scalability in the cloud.- Designed and led the implementation of the data synchronization process which replicated and transformed the source data (developers and applications) to the consumer marketplace.- Became the technical lead of the four developers (myself included) who implemented the various end-to-end systems. Came up with estimates, planning and scheduling of the team.- Designed the developer account and identity vetting system.- Designed custom data replication strategy for various Azure data storage for geo-replication, failover and disaster recovery scenarios.- Designed data partitioning system for a new user-centric system.

Redmond, Washington, Us

Microsoft BOS BI- Designed and implemented a metadata driven data warehouse and ETL system which allowed data to be pulled from various sources, including csv files, SQL DB backups and SQL tables. - Designed and implemented a Microsoft SSAS OLAP cube to provide access to processed data and analysis service.- On top of the cube, a series of Excel, Microsoft SharePoint and SQL SSRS reports were implemented for business and marketing analysis and management KPIS.- Defined, designed and implemented security access to DW in a unified and generic way through metadata.

Redmond, Washington, Us

Microsoft Office Live- Designed and implemented the offer data model and management system in Microsoft Office Live. The offer management system supported offers of various types, including base, add-on, recurring, promotional, etc. It also supported offer conversion, lifecycle management and auditing. - Designed the data partitioning strategy for storing user and subscription data. Created a lookup table which maps user and subscription IDs to their corresponding data location. The design supported high availability and low latency, and also allowed for data relocation, data re-partitioning, and new partition addition.- Handled deployments and worked closely with Ops. Also in rotation for live site support, including maintenance work, bug fixes and developing features in short release cycles (6 weeks)

Redmond, Washington, Us

Microsoft Office InfoPath- Designed and implemented data connections in InfoPath client and server, which enable users to connect to various back ends (SQL, Web Services, XML, SharePoint) to retrieve and submit data.- Performance tuning: used memory and CPU profiles to identify problematic areas and optimize various parts of the application.- Designed and implemented Information Rights Management, a way to protect information in InfoPath forms and solutions.- Worked in a team that built an HTML spreadsheet on top of an existing Excel calculation engines. Mainly responsible for the HTML UI.

Bachelor Of Science (B.S.), Computer Science

Education record