David Zhang Email & Phone Number

San Francisco, California, Us

Seattle, Wa, Us

- Developed on a service that provides expected delivery dates to customers along with tools to create a scalable logistics network worldwide- Communicated with upstream services and stakeholders to make network configurations and enhance systems- Migrated alarms/scripts from using Oracle database to Postgres database- Prepared service for Prime Day 2019 through planning, performance testing, and proactive scaling/descaling of hardware- Created log filtering mechanism to prevent excessive logging to overload servers- Adapted script to detect servers that contained stale logistics data to avoid inaccurate configuration to be used in production

Seattle, Wa, Us

- Created a service that transforms inventory plans from one format to another format to provide internal teams with customizable plans- Utilized multiple services to store business rules needed for transformation and perform the transformation asynchronously- Wrote comprehensive implementation, documentation and designs for team members to build upon the project

- Worked as a research lab that creates simulations for particular studies related to improving cognitive thinking- Developed on an existing 3D simulation catered to people with auditory deficiencies- Refactored game's core code and existing features to improve simulation's functionality- Added new features such as random item generation and achievements- Project is released in the iOS platform under the name "Listen"