David Liu Email & Phone Number

Redmond, Washington, Us

Azure Security• Lead and coordinate the security prevention conversation among service teams.• Mitigate and prevent credential leaks to protect Microsoft and its clients.• Design and develop a centralized system to provide suppression support, service team information integration, tickets filing and detailed repro procedure.

Bellevue, Washington, Us

Seattle, Wa, Us

Weblab A/B test platform development:• Designed and implemented the Policy Engine long launched Weblab campaign to warn internal users to terminate/wrap up their experiments if no longer needed and running for a while. • Designed and implemented the Block days automation system to automatically set and lift the block days on A/B tests based emergent events and sales events, save 100% effort for night ops job, save 100% memory spent on experiments no longer used. Improved time granularity from date scale to second scale and handle the different time zone A/B test blocking and unblocking. • Modernized the Weblab APIs into micro services.

Redmond, Washington, Us

• Developed the substrate search suggestions platform to improve platform stability, agility and compatibility.• Added new feature of shared mailbox and group mailbox to suggestions and query.• Implemented the flighting train migration to allow data scientists to control flights efficiently.• Improved the decoupling watchdogs monitoring the health of service running on each server. • Implemented web service platform migration and upgrades with the inner data abstraction and adapters.• Implemented of REST search data schema and REST API handlers by using C#.As part of On-call Rotation, helped in live site monitoring of product through mitigation steps, engaging partner teams.

Seattle, Wa, Us

• Participated in design and implementation of Tax Rate Validation in Vendor Central System, Vendor Notification Service, Business Advisor Service, Aggregate Consistency Enforcement System, and Metrics Alarms by using AWS & Java.• Participated in the on-call Rotation, helped in live site monitoring of product through mitigation steps, engaging partner teams.

Seattle, Wa, Us

Teaching Content: Fundamental algorithms and data structures for implementation. Techniques for solving problems by programming. Linked lists, stacks, queues, directed graphs. Trees: representations, traversals. Searching (hashing, binary search trees, multiway trees). Garbage collection, memory management. Internal and external sorting. Key computational abstraction levels below modern high-level languages; number representation, assembly language, introduction to C, memory management, the operating-system process model, high-level machine architecture including the memory hierarchy, and how high-level languages are implemented. Fundamentals of enumeration, discrete probability, and applications of randomness to computing which is the foundation of Machine Learning and Artificial Intelligence. Hold office hours, tutor 100 students, and grade homework and exams.

Seattle, Wa, Us

Tutored the algorithm and syntax in Java programming for an AP class at Roosevelt High School as a UW based tutor.Taught the HTML & CSS for two web programming classes

Seattle, Wa, Us

Utilized Java & C to analyze the Android's sensor data and trimmed down the relation among the data groups.Reduced the runtime the implement of an analysis program from O(n^2) to O(n).

Seattle, Wa, Us

Grade four math classes homework and give the feedback to the students.Publish the grades on catalyst on time.

Seattle, Wa, Us

Added new features to a Java Application Mason: Designed and developed both the font-end (Swing Lib) and the back-end of reporting tools Wrote JUnit Tests and accessibility features.Designed web-portal reports tools (internal tools) based on conductor service: a bridge between back-end service and front-end webpage. Visualized the data and enable the database's functionality of update/edit/insert at front-end.

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

High School Diploma