Leading Tasti Inc., a tech-driven company specializing in mobile e-commerce solutions for restaurants and food trucks. Our suite of innovative software and hardware products streamlines order processing and enhances client marketing strategies.Key Achievements:POS System: Guided the development of a robust Cloud Point of Sale (POS) system, including POS terminals, credit card readers, printers, and a scalable cloud infrastructure. This comprehensive solution ensures seamless transactions, contributing to an efficient and reliable payment processing experience.Interactive Kiosks: Led the design and implementation of indoor and outdoor large size touchscreen kiosks, transforming customer self-ordering. Outdoor kiosks double as digital billboards, significantly enhancing visibility and strategically attracting customers from a distance, adding a marketing dimension to the overall experience.Mobile Ecosystem: Built iOS and Android apps for customers to order for pickup and delivery, alongside providing store owners with easy access to their POS systems. Created a mobile social network connecting food truck owners, event organizers, and customers. This transformative mobile ecosystem enhances user experiences and promotes community engagement.My Role:As CEO, my role goes beyond traditional business boundaries—I am deeply engaged as a hands-on full-stack software engineer, actively shaping the technical landscape of Tasti's offerings.System Architecture: Engineered a highly scalable architecture with extensive caching for optimal performance and efficiency.Core Data Models: Designed core data models utilized across front-end, server, and database.Backend Implementation: Personally designed and implemented the majority of backend modules. Devised a flexible architecture enabling dynamic sharding of entities (stores, venues, and users) across multiple market servers based on user traffic load.

As the Founder and CEO of NuiStars, I co-established a startup dedicated to crafting image and short video-based mobile social apps. Collaborating with my co-founder Wei Liang, we were pioneers in introducing innovative in-app image and video editing features. These pioneering features later gained popularity and adoption in other major social platforms, including Snapchat and Facebook.Key Achievements:Product Innovation: Designed and developed groundbreaking products that included pioneering in-app image and video editing features.Market Impact: Successfully achieved over 200,000 viral downloads among U.S. teens, demonstrating significant market impact and user engagement.Business Operations: Led various aspects of the business, including raising funds, overseeing marketing and sales strategies, and ensuring high levels of user engagement.

As a key member of the senior management team at Facebook Ads, I played a pivotal role in shaping critical business decisions and leading transformative initiatives in both brand advertising and driving in-store sales for brick-and-mortar stores.Key Achievements:Reach and Frequency (RF) Leadership: Led the development of Reach and Frequency (RF), Facebook's flagship ad product for brand advertisers. Personally recruited and managed the RF engineering team, guiding the development of key algorithms.Exceptional Growth: Within two years, RF achieved a remarkable over billion-dollar run rate, solidifying its status as one of the most successful ad products within the company.Patent Contributor: As the main inventor, contributed significantly to the development of two patents related to Reach and Frequency (RF) at Facebook.My tenure at Facebook Ads was marked by a commitment to innovation, strategic leadership, and the successful execution of high-impact initiatives.

As Principal Architect at Microsoft Corporation, I played a pivotal role in developing multiple innovative products within adCenter. These initiatives not only enhanced the efficiency of the Bing Ads marketplace but also contributed significantly to revenue growth.

Radio Ads: Contributed to the development of Radio Ads, designed and implemented the next version of the storage system for radio ads, which significantly improved system scalability and efficiency.Scalable Index Engine on Bigtable: Led the design and implementation of a Scalable Index Engine atop Bigtable. This system constructs multi-column indexes, facilitating efficient cross-column range queries for enhanced data retrieval from extremely large data sets.Google Base APIs: Worked closely with the product management team, designed new APIs and implemented components for Google Base to enable new functionalities.

Member of the core operating system team. During this tenure, I focused on the componentization of the Microsoft operating system. This involved tailoring the system to allow for customizable builds, ensuring adaptability to specific application requirements.Key Contributions:Core Operating System Enhancement: Worked on the enhancement of the core operating system to enable customization, facilitating the creation of tailored builds.Application-Specific Adaptation: Contributed to the development of a system that could be fine-tuned to meet the unique requirements of specific applications.

As a Software Engineer at Sun Microsystems, I was an integral member of the Jini/RMI team. Jini, a service-oriented platform for Java-based distributed applications, provided a robust framework for various aspects, including service declaration, discovery, network security, distributed failure detection and recovery, leasing, transactions, and events.Key Contributions:Kerberos Security Module: Designed and implemented the Kerberos security module, enhancing the security infrastructure of the Jini platform.Jini Surrogate Reference Implementation: Led the design and implementation of the Jini Surrogate reference implementation, contributing to the advancement of distributed applications in Java.Jini Module Suite Refactoring: Successfully refactored the Jini reference module suite, providing a solid foundation for clients to build their Jini applications.