# Harrison Zhao > Senior Software Engineer at Roblox Location: San Francisco, California, United States Profile: https://flows.cv/harrisonzhao Worked on product engineering, operations platforms, distributed backend systems, web, mobile, and machine learning. ## Work Experience ### Senior Software Engineer @ Roblox Jan 2021 – Present | San Francisco Bay Area ● Safety Platform ● IP Rights Manager ●"roblox_user_" reset ### Software Engineer @ Standard Cognition Jan 2019 – Jan 2021 Grab & go! Autonomous checkout for brick & mortar retailers. ● Building tools to enable an accurate and frictionless autonomous checkout system. ● Coordinate with the operations team to iterate on tools to triage, identify, and automate correction of machine learning errors ● Building infrastructure and pipelines to playback historical feeds, simulate real world shopping events, and ingest machine learning signals. ● Upgrading backend infrastructure critical to authentication, AB testing, cloud, and other core services. ● Work on visualizing Machine Learning signals to help cross validate predictions ● Integrated with Auth0 ● Handle lifecycle of many terabytes of data using Cloud Spanner + BigTable ● Primarily working in a Python, Go, React, Postgres stack with microservices hosted on GCP ### Founder @ Building Chatbots / Software Engineering Consulting Jan 2018 – Jan 2019 | Greater New York City Area Building Chatbots ● Built order ahead chatbots for the restaurant industry using Facebook's Messenger Platform on a Golang, React and Postgres stack ● Contributed to the leading open source Golang SDK for Facebook's Messenger Platform APIs ● Learned a lot about how to launch a product and how to address challenges facing a B2B2C product. ● Ran into issues around unit economics, Messenger platform instability, and operational issues. Technical Consulting ● Created a specialized ed-tech platform for tracking student attendance and recording payments ● Primarily used Python, React, React Native, Cloud Firestore, Terraform on GCP's platform ### Software Engineer @ Yext Jan 2016 – Jan 2018 | Greater New York City Area In this role, I've primarily architected and delivered new features across the stack for the Listings product, which synchronizes and manages a business' location information across Yext's 100+ publisher network. I worked in an Agile environment and primarily used Java, Javascript, Go, and HTML/CSS. Notable accomplishments: ● Worked closely with engineering leadership to improve billing infrastructure and auditing capabilities critical to Yext's IPO. ● Helped architect and implement improvements to Duplicate Listing Suppression, which suggests and helps businesses suppress unwanted / inaccurate listings. ● Modernized and improved human in the loop data labeling systems responsible for resolving problems where a computer may not be able to automatically infer the best answer. These problems include Duplicate Listing Suppression and Listing Matching, core features of the PowerListings product. ● Wrote ETL pipelines and performed database migrations from a MYSQL backed datastore to Elasticsearch for 200 million+ entities, decreasing page load and text query times by 100x for large accounts, such as Allstate and McDonald's. ● Wrote several microservices with Protobufs and domain driven design backend code integrated with web application admin datables. Yext is defining a new category called digital knowledge management, which helps businesses manage all of the public facts that they want consumers to know across the digital ecosystem. The Yext Knowledge Engine™ lets companies manage their digital knowledge in the cloud and sync it to over 100 services in the PowerListings® Network. Yext Listings, Pages, and Reviews help businesses around the globe facilitate face-to-face and digital interactions that boost brand awareness, drive foot traffic, and increase sales. ### Matlab Instructor @ The Cooper Union for the Advancement of Science and Art Jan 2015 – Jan 2016 | Greater New York City Area Taught sophomores MATLAB and how to use it for signal processing applications ### Software Engineer Intern @ Yext Jan 2015 – Jan 2015 ### Intern @ The Hackerati Jan 2014 – Jan 2015 - Agile software development and web development using Node.js, Python, Scala, Angular.js. - Development Operations using Vagrant and Chef. ## Education ### Master of Engineering (M.Eng.) in Electrical Engineering The Cooper Union for the Advancement of Science and Art Jan 2015 – Jan 2016 ### Bachelor of Engineering (B.E.) in Computer Engineering The Cooper Union for the Advancement of Science and Art Jan 2012 – Jan 2016 ### Stuyvesant High School Jan 2008 – Jan 2012 ## Contact & Social - LinkedIn: https://linkedin.com/in/harrisonzhao --- Source: https://flows.cv/harrisonzhao JSON Resume: https://flows.cv/harrisonzhao/resume.json Last updated: 2026-03-22