# Belinda Gu > Engineer at Sierra Location: San Francisco, California, United States Profile: https://flows.cv/belindagu ## Work Experience ### Engineer @ Sierra Jan 2023 – Present | San Francisco, California, United States ### Engineer @ Cocoon Jan 2021 – Jan 2023 Early engineer building product at Cocoon. - DRI / TL of the leave product pillar. Led the team in shipping multiple foundational improvements to the product, including launching caregiver leaves and work weeks. Primary point of contact on any "first of kind" edge case, and helped drive decisions and author runbooks for 30+ cases. - Helped lead a two month initiative around correctness, and pushed for a major investment in data integrity. Drove 10+ audits to correct user data and pay. - Shipped a variety of tools across the board to enable ops flows and improve visibility and debugging. ### Principal Architect @ Quip Jan 2015 – Jan 2021 | San Francisco, CA Early engineer that helped build out Quip's product and infrastructure. Key contributions: - Led a major project to rewrite the spreadsheets FE and BE to support 1M cells. Owned the initial backend design and prototype, and was eventually the TL of a team of six to take the rewrite to launch. - Conceived and led an initiative to redefine the ID format of sections, in order to reduce complexity and remove the largest source of bugs in the document saving pipeline. - Designed and implemented a rewrite of the background syncing system. Primary goals were to reduce db cpu and iops by reducing syncing load, and to create a system that is extensible and easy to reason about. - Shipped an assortment of product features, including granular sharing and account switching. - Led process improvements around area ownership and peer reviews. Organized lightning talks, did formal and informal mentorship, wrote lots of documentation, and other work to scale up the engineering team. Quip was acquired by Salesforce in August 2016. ### Software Engineer @ Google Jan 2013 – Jan 2014 | Mountain View, California, United States Built and shipped v1 of the Android app for Google Helpouts with one other engineer. Contributed to the redesign of the Glass app for a confidential project in Google X. ### Engineer @ Quora Jan 2010 – Jan 2013 | Palo Alto, California, United States Joined as the 11th employee and helped build and scale Quora. Reimplemented the infrastructure backing the homepage newsfeed to use a C++ service powered by Redis. Owned and iterated on feed story ranking, improving core feed metrics by an order of magnitude. Key contributor to a full backend rewrite from Python to Scala (project was ultimately canceled). ### Software Engineer @ Microsoft Jan 2008 – Jan 2010 | Mountain View, California, United States Worked on the Hotmail Protocols team, building services that enable syncing Hotmail data to mobile and desktop clients. Helped launch a new service to support Exchange ActiveSync, a protocol that syncs mail, calendar, and contacts. ## Education ### MS in Computer Science Stanford University ### BS in Computer Science Stanford University ## Contact & Social - LinkedIn: https://linkedin.com/in/belinda-gu-10282113 --- Source: https://flows.cv/belindagu JSON Resume: https://flows.cv/belindagu/resume.json Last updated: 2026-04-11