Zhangxuan Xu
Product Development Engineer at Douban
Chaoyang District, Beijing, China
Summary
👤
Senior🎓
Top SchoolZhangxuan Xu is a product development engineer with 16 years’ experience building high-throughput backend systems in Java and Python, currently designing APIs and a mobile push platform at Douban. He has deep distributed-systems expertise from roles at Youku and Alipay, having led development of a push notification system handling millions of long connections and hundreds of millions of messages daily. Comfortable with Netty, gevent, ZeroMQ, ZooKeeper and NoSQL stores like Redis and MongoDB, he combines production-grade engineering with performance tuning and operational ownership. An active open-source contributor, he has improved core functionality in projects such as the Clojure Liberator library and added HTTP/2 features to Python’s hyper, reflecting a pragmatic fluency across languages. Based in Beijing, he brings a track record of designing scalable SOA architectures and optimizing delivery rates for mobile services.
16 years of coding experience
5 years of employment as a software developer
Bachelor's degree, Information Management and Information System, Bachelor's degree, Information Management and Information System at Hangzhou Dianzi University
Chinese, English
Github Skills (11)
clojure10
http10
functional-programming10
rest10
python10
clojure-cli10
server-side10
concurrency9
testing9
multithreading9
lib9
Programming languages (10)
Github contributions (5)
python-hyper/hyper
Aug 2016 - Nov 2016
HTTP/2 for Python.
Role in this project:
Backend Developer
Backend DeveloperContributions:5 commits, 3 PRs, 14 comments in 3 months
Contributions summary:Zhangxuan contributed to the `hyper` repository, which focuses on HTTP/2 implementation in Python. Their commits primarily focused on improving the core functionality by adding support for PING frames, including sending and receiving them. Additionally, they addressed connection state management issues related to closing connections and implemented a single lock model for concurrency control within the HTTP/2 connection. The user also improved testing.
python
clojure-liberator/liberator
Mar 2013 - Jun 2013
Liberator is a Clojure library for building RESTful applications.
Role in this project:Back-end Developer
Back-end DeveloperContributions:6 commits in 2 months
Contributions summary:Zhangxuan primarily contributed to the `liberator` Clojure library, focusing on utility functions and core logic. Their work involved modifying and enhancing the `util.clj` file with features like the `by-method` function and correcting `use` statements. Further modifications included moving the `make-function` function and merging updates, indicating a contribution to the core functionality and maintenance of the library. Their work demonstrates a good understanding of the library's inner workings and the Clojure language.
clojurerestrestfulserver-side
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