Junjun Zhang
Director, Architecture at American Express
Hangzhou City, Zhejiang, China
Summary
👤
Senior🎓
Top SchoolJunjun Zhang is a seasoned Director of Architecture with two decades of hands-on experience designing and operating high-availability middleware and messaging platforms for large enterprises, currently leading architecture at American Express in Hangzhou. He combines deep expertise in application servers (WebSphere, WebLogic, JBoss, Tomcat), messaging systems (Kafka, RocketMQ, RabbitMQ, Tibco), Nginx/OpenResty with Lua for dynamic routing, and robust monitoring and infrastructure tooling to optimize performance and reduce costs. His career includes large-scale modernization and capacity projects at Deutsche Bank and payment platform leadership roles at Lianlian Pay and Jollychic, where he successfully shrank infrastructure footprint without impacting performance. Equally comfortable in Unix/Solaris operations, virtualization, and database/RAC environments, he brings practical coding skills across C/C++, Java, Python and shell scripting to rapidly prototype and troubleshoot complex systems. Known as a pragmatic technical lead and incident “last resort,” he blends architecture vision with operational rigor and a proven track record of delivering resilient, high-throughput payment systems.
10 years of coding experience
9 years of employment as a software developer
Bachelor, Eletricity Power System, Bachelor, Eletricity Power System at Nanjing University of Science and Technology
English, Chinese
Github Skills (58)
hosts9
windows9
google9
fedora8
centos8
ubuntu8
driver8
kernel-module8
ide8
windows-package-manager8
openvpn8
synology7
agentic7
displays7
java7
Programming languages (11)
Github contributions (5)
topcheer/go-aliyundrive-webdav
Dec 2021 - Jan 2022
阿里云盘(https://www.aliyundrive.com/) 的webdav协议开源实现
Contributions:103 commits, 103 pushes, 1 branch in 26 days
aliyundrivewebdav
topcheer/ggcode
Apr 2026 - Jul 2026
Fresh Agentic CLI, Desktop, Mobile & More
Contributions:4 releases, 599 pushes, 4 branches in 3 months
agenticclimobile
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