# Joshua Yuen > Software Engineer Location: San Francisco Bay Area, United States Profile: https://flows.cv/joshuayuen1 Full stack engineer ## Work Experience ### Software Engineer @ Sequoia Capital Jan 2019 – Present | Menlo Park, California, United States ### Software Engineer @ WhatsApp Inc. Jan 2016 – Jan 2019 ### Principal Engineer/Tech Lead @ Polyvore Jan 2013 – Jan 2016 | Mountain View, CA • Architected and built the Android app from ground up from networking to UI with native Android experience with various libraries including Volley, Eventbus, UrbanAirship, etc • Maintained the app at 4.5+ stars with 500k+ downloads • Worked with marketing team to develop push notification campaign • Thoroughly instrumented the app with Google Analytics to provide business insight ### Senior Software Engineer @ Polyvore Jan 2011 – Jan 2013 | Mountain View, CA • Designed and implemented Cassandra binary protocol and API for Perl • Designed and implemented the asynchronous task process system, using Gearman • Architected, designed, and developed major components of big data platform using Cassandra, Hadoop, and Hive • Developed and maintained site monitoring and alert system using Graphite, Carbon, Nagios ### Software Developer @ OANDA Jan 2008 – Jan 2011 • Key contributor throughout the full development cycle of a multi-threaded C++ server for automated hedging using Agile methodology • Developed trade and hedging simulations with profitability and trading algorithms • Architectural design and develop a flow-based Prime Brokerage server to exploit the new business opportunities for OANDA to act as prime broker • Implemented well structured and sophisticated Perl scripts to generate various financial reports • Improved code quality with refactoring, setting up unit test framework and performing code reviews • Provided analysis, diagnostic, and solution implementation on performance issues using DTrace on Solaris server ### SDET @ Microsoft Jan 2006 – Jan 2008 | Redmond, WA • Developed a media-rich e-learning website with CMS support using Symfony framework and MySQL • Built a CRM system for sale, points and reward with a custom framework using PHP and MySQL • Built an ordering system for franchisors and franchisees • Built an online personal finance tracking system • Debugged and supported several e-commerce websites ## Education ### BMath in Computer Science University of Waterloo ## Contact & Social - LinkedIn: https://linkedin.com/in/joshuayuen88 --- Source: https://flows.cv/joshuayuen1 JSON Resume: https://flows.cv/joshuayuen1/resume.json Last updated: 2026-04-11