Junfeng Liu
Senior Software Development Engineer at Polaris Securities
Shanghai, Shanghai, China
Summary
🤩
Rockstar🎓
Top SchoolJunfeng Liu is a Senior Software Development Engineer based in Shanghai with 12 years of experience building backend systems and developer tools. He combines production engineering at firms like Polaris Securities with hands-on open-source work—most notably contributing a Rust PDF manipulation library that implements object models, stream compression, and text extraction. Comfortable across low-level document formats and server-side engineering, he brings practical expertise in performance-sensitive code and file I/O. A Computer Software Engineering graduate from Northwestern Polytechnical University, he pairs solid academic foundations with a track record of shipping reliable, maintainable tooling used by other developers.
12 years of coding experience
学士, Computer Software Engineering, 学士, Computer Software Engineering at 西北工业大学
Github Skills (8)
rust10
fileio9
file-access9
data-structure9
file-handling9
data-structures9
file-processing9
object-oriented-programming7
Programming languages (13)
Github contributions (5)
J-F-Liu/lopdf
Dec 2016 - Dec 2022
A Rust library for PDF document manipulation.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:21 releases, 146 commits, 194 PRs in 6 years 1 month
Contributions summary:Junfeng primarily contributed to the development of a Rust library for PDF document manipulation. Their work focused on defining PDF objects, implementing document structures, and building a writer module for saving PDF documents to files. Furthermore, the user implemented functionalities to compress and decompress stream objects and add object to page to a form XObject. The user also implemented functionality to extract text from pages.
manipulationrust-librarypdf-manipulationpdfrust
J-F-Liu/pom
Dec 2016 - Sep 2020
PEG parser combinators using operator overloading without macros.
Contributions:19 releases, 1 review, 112 commits in 3 years 9 months
macrosrustoverloadingoperatorparsing
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