Jan 2022 – Oct 2023 · 1 yr 9 mos · San Francisco Bay Area

• Various platforms & services for Clubhouse's core business flow: anti-abuse system, communication platform (SMS and email), voice transcription service, etc.

Oct 2020 – Jan 2022 · 1 yr 3 mos · San Francisco Bay Area

• Trust & safety platform

Sep 2014 – Oct 2020 · 6 yrs 1 mo · San Francisco Bay Area

• Various platforms & services for Uber's core business flow: search, communications, finance forecasting, tax.
• UberEats search & discovery platform (search relevance, query understanding, deliverability & discoverability)
• Uber communication platform (Voice call anonymization, in-app chat, SMS's, emails, push notifications)
• Uber finance forecasting platform (Spark, Machine Learning, Hive, Hadoop, Cassandra)
• Uber tax platform (EMobility, Eats, Freights)

Jan 2013 – Jan 2014 · 1 yr · San Francisco Bay Area

• Lead the infrastructure team. Architecture, design and develop Cyphort Global Security Service cloud platform for appliance management, health monitoring, malware detection, software update and data storage.

Jan 2012 – Jan 2013 · 1 yr · San Francisco Bay Area

• Lead the platform team. Architecture and design the cloud platform across all product lines. Maintain the cloud infrastructure and operate the cloud services.
• REST API service for data collection, device registration, provisioning and management in AWS
• Hosted machine to machine services (motion, current, temperature sensors, etc) in AWS
• Portal for user registration and account management
• Single-sign-on (SSO) system with integration to all product lines and online services
• Dashboard monitoring and analytics service with real-time user and device statistics
• Operation automation of cloud service deployment and maintenance

Jan 2011 – Jan 2012 · 1 yr · Los Gatos, CA

• Media pipeline and cloud computing.
• Large scale cloud computing system (4000+ AWS EC2 instances)
• Distributed massive parallel encoding system
• Cloud-based content deployment
• Scalable and configurable scheduling

Jan 2006 – Jan 2011 · 5 yrs · San Francisco Bay Area

• Design and development of real-time embedded systems and high-performance secure networks in C/C++, improve network performance via server load balancing and application acceleration. Assume key role in function specification, system design, feature implementation and testing. Invent fast and efficient algorithms for networking and distributing systems. Three patents issued.
• Server load balancer for high-end secure router (United States Patents 8,433,808 and 8,762,534).
• Object store module for WAN acceleration.
• Application acceleration for HTTP and CIFS.
• Web filtering for branch-office secure router.
• Stateful inspection for SCTP protocol on firewall (the world's first SCTP firewall solution; United States Patent 7,890,637).

Jan 2005 – Jan 2006 · 1 yr · San Francisco Bay Area

• Designed, developed and maintained core modules of Yahoo search engine.
• Caching module for proxy server.
• Query annotation module.
• Query result deduplication.
• Query result last-page handling.

Jan 2004 – Jan 2005 · 1 yr · Greater Minneapolis-St. Paul Area

• Developed a cardiac analysis system for real-time data acquisition and pacing control.