Zhiyu Liu
Software Development Engineer II at Amazon Web Services (AWS)
Bellevue, Washington, United States
Summary
👤
Senior🎓
Top SchoolZhiyu Liu is a seasoned software engineer with eight years of experience building large-scale consumer and content-delivery systems at Amazon and AWS, specializing in mobile and cross-platform SDKs using Java, Kotlin, Objective‑C, Swift and C++. He has driven high-throughput book delivery services supporting millions of daily downloads and contributes end-to-end as a full‑stack engineer across iOS, Android and backend services. A Master of Computer Science from NC State, he pairs strong engineering fundamentals with practical performance work—previous internships include optimizing REST APIs and medical imaging platforms, and an Android door-access app that cut user friction by 80%. Zhiyu also contributes to open-source education tooling like Expertiza, focusing on account workflows and test coverage, demonstrating attention to maintainability and collaboration. Based in Bellevue, WA, he blends systems thinking with mobile UX sensitivity to reliably ship cross-surface features at scale.
8 years of coding experience
3 years of employment as a software developer
Master of Computer Science Computer Science, Master of Computer Science Computer Science at North Carolina State UniversityBachelor of Engineering - BE Electrical and Electronics Engineering, Bachelor of Engineering - BE Electrical and Electronics Engineering at North University of China
Github Skills (10)
ruby10
rspec10
ruby-rails10
rails10
expert9
expert-system9
database-management9
st8
peer8
peer-to-peer8
Programming languages (1)
Github contributions (5)
expertiza/expertiza
Nov 2017 - Dec 2017
Expertiza is a web application through which students can submit and peer-review learning objects (articles, code, web sites, etc). The Expertiza project is supported by the National Science Foundation.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:10 commits, 2 PRs, 3 comments in 26 days
Contributions summary:Zhiyu primarily focused on implementing features related to user account requests and administration within the Expertiza application. Their contributions involved modifying the `users_controller.rb`, and views to manage the request process, including approving, rejecting, and sending emails. The user also worked on features to add institutions and improve test coverage for these functionalities. The code changes also included modifications to the database schema and factory files.
nationalpeer-reviewexpertiza-wikidjangoexpertiza
terryliu1995/peer-to-peer-system
Apr 2018 - Mar 2019
Contributions:21 commits, 2 PRs, 17 pushes in 11 months
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