# Guangshuo Zang > Staff Software Engineer @ Promptfoo Location: San Francisco Bay Area, United States Profile: https://flows.cv/guangshuo ## Work Experience ### Staff Software Engineer @ Promptfoo Jan 2025 – Present ### Senior Full Stack Engineer @ Smile Identity Jan 2023 – Present | San Francisco Bay Area ### Senior Software Engineer @ Chipper Cash Jan 2021 – Jan 2023 | San Francisco Bay Area Worked as a senior software engineer on all API products. Designed and implemented large projects. Led the engineering team to success on key projects. Expanded company’s business domain. Achievement Highlights: - Led multiple large projects and drove them to successful completion. - Designed and implemented the fee structure system for the whole platform. - Designed and implemented Merchant Dashboard tool as the first web frontend product in the company. - Designed and implemented bulk payment system that allow api merchants to upload large amounts of payout requests and process them async. - Improved system reliability by re-architect service structure by separating web server and worker processes. - Mentored junior engineers on the team. Designed new member’s onboarding tasks and experiences. - Constantly worked with cross-functional teams to ensure all stakeholders are satisfied. Increased team’s visibility and recognition. ### Solutions Engineer @ Facebook Jan 2018 – Jan 2021 | Menlo Park, California - Initiated signal migration helper project to help app clients adopting API to send facebook signals from server-side. - Implemented Ads Limits features on Business Manager to guide how clients can optimize their ad’s performance in a new way. - Designed important features on ads simplification tool, which is widely used within Facebook to identify clients’ ads structure issues. - Co-piloted advertising strategies and provided engineering guidance to the billion-level-spent-yearly clients. - Engaged with clients through email, messenger, face-to-face meetings to understand their business models, advertising needs. - Extended facebook’s dynamic ads product capability by adding physical position into ads catalog to enable ads ### Software Engineer @ DotDashPay Jan 2017 – Jan 2018 | San Francisco Bay Area - Comprehensively learned the system in 2 months and worked as an essential engineer. - Refactored part of system communication flow and improved cloud services’ error handling system, resulted in more usable and consistent apis for clients. - Designed and implemented migration and tests framework, which prevents migration errors that hard to be caught before, hence improved overall system stability. - Designed and implemented customer profile relations and data structures, built solid foundation for future data analysis. - Performed regular deployment/configuration for deployment. - Refactored whole javascript backend code into typescript together with the team. Resulted in a more type safe and consistent backend. - Implemented important code auto-generation logic. ### Software Engineer @ Visa Jan 2017 – Jan 2017 | Foster City - Launched checkout app on Android Pay and Samsung Pay. Introduced an innovative way of ecommerce checkout. Expanded product impact. Boosted user grow speed. - Designed and implemented new checkout features like SVG based checkout widget, exposing to millions of customers. Improved user experience satisfaction. - Designed and built new restful service from scratch, including database table design, service API and more. -Implemented comprehensive unit tests and automated integration tests. Managed to deliver plans for each release, resulting in zero P0 – P2 bugs before each functional sign off. - Delivered dynamic SVG based checkout widget. Learned SVG animation and built prototype demo in 3 days. Resulted in successful release in VCOP 5.5. - Closely cooperated with design and product teams for requirement understanding, planning and adjustment. ### Software Engineer @ Accenture Jan 2016 – Jan 2016 | Mountain View - Gained a comprehensive understanding of the product in a short time, learned Google developer tools and quickly applied the knowledge in to work. Result in performing well with the team within two weeks. - Implemented 8 new features and fixed over 40 bugs. Submitted over 60 change lists. - Co-hosted stand up meeting and reported achievement daily. ### Software developer @ Fitch Ratings Jan 2014 – Jan 2016 | Reading, Pennsylvania Area - Improved performance business template calculation by more than 100%, also improved performance on cache loading, statement loading, etc. Got positive feedback from stakeholders. - Contributed through development lifecycle, worked cross functionally with business team and engineering team, contributed in identifying client’s demands, implemented demanded features, and built integration tests. Resulted in 7 successful production releases. - Co-designed new features, like business template validation engine, peer group report generator, etc. Implemented new data structure and logic to parse big data through web service and more. Designed and implemented new database tables, triggers, types and store procedures in oracle database. Expanded application’s existing functionalities and capability. - Chaired production support team, provided immediate supports upon user’s requests, including defect priority analysis, rescheduling, and providing fix solutions and code change. - Collaborated with multiple teams to understand heavy business logic under time pressure, and applied software expertise to the project. ### Software Engineer Internship @ ClusterTech Limited (aka Cluster Technology Limited) Jan 2013 – Jan 2013 | Beijing City, China • Transplanted “Cooley-Turkey” FFT algorithm onto company’s FPGA platform for performance gain analysis purpose. • Implemented core logic in Java with Maxeller Compiler Utility libraries. Came to a detailed performance report between the FPGA platform and CPU platform. ## Education ### Master’s Degree in Computer Engineering Boston University ### Bachelor's degree Shandong University ## Contact & Social - LinkedIn: https://linkedin.com/in/guangshuo-zang-23455361 --- Source: https://flows.cv/guangshuo JSON Resume: https://flows.cv/guangshuo/resume.json Last updated: 2026-04-01