Justin Jung
Software Development Engineer at Amazon Web Services (AWS)
Vancouver, British Columbia, Canada
Summary
🤩
Rockstar🎓
Top SchoolJustin Jung is a full-stack Software Development Engineer with 10 years of experience building scalable web and backend systems, currently contributing to AWS from Vancouver. He blends front-end React expertise—demonstrated by UI work on ApryseSDK's WebViewer—with backend and DevOps contributions to high-scale projects like Cortex, where he optimized store-gateway performance and added token-bucket rate limiting. His background spans product ownership and customer-facing support from PDFTron to hands-on embedded and mobile work, giving him a pragmatic end-to-end perspective from BLE-equipped Android apps to cloud services. Comfortable bridging UX details and distributed systems, he has a track record of shipping bug fixes, refactors, and feature integrations that improve reliability and developer experience. Trained as an electrical engineer at the University of Waterloo, he brings applied engineering rigor and a habit of surfacing non-obvious performance and usability gains.
10 years of coding experience
5 years of employment as a software developer
Bachelor's Degree, Electrical Engineering, Bachelor's Degree, Electrical Engineering at University of Waterloo
English, Korean
Github Skills (14)
data-storage10
thanos10
uid10
javascript10
go10
web-development10
frontend10
prometheus10
front-end-development10
ui-design10
react10
kubernetes-pods9
devops9
kubernetes9
Programming languages (5)
Github contributions (5)
ApryseSDK/webviewer-ui
Oct 2018 - Jun 2019
WebViewer UI built in React
Role in this project:
Front-end Developer
Front-end DeveloperContributions:11 releases, 214 commits, 173 PRs in 8 months
Contributions summary:Justin's primary contributions revolve around the implementation and modification of UI components within the WebViewer UI, built in React. This is evident from the commits focusing on the `SearchOverlay` and `ThumbnailsPanel` components, including code changes related to event handling, user input, and display logic. They also addressed bugs, refactored code, and integrated new functionalities, such as handling page navigation and enabling keyboard shortcuts for annotations within the UI.
reactreact-pdfoffice-viewerwebviewerpdf-viewer
cortexproject/cortex
Mar 2023 - Mar 2025
A horizontally scalable, highly available, multi-tenant, long term Prometheus.
Role in this project:Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:100 reviews, 20 PRs, 117 comments in 2 years
Contributions summary:Justin primarily focused on improving the store gateway, a core component of the Cortex project, by addressing performance bottlenecks and adding features. Their contributions include implementing token bucket limiters to control resource usage, thus preventing overload. They also fixed a bug in the ring comparison logic and improved the query priority mechanism. The user also upgraded Thanos, and ensured its integration with the existing system, to improve the project's data handling capabilities.
golangscalabletenantprometheus-exporterlong-term
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.