Felix Yan
Senior R&D Engineer at Wuhan Deepin Technology
Wuhan, Hubei, China
Summary
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Rockstar🎓
Top SchoolFelix Yan is a Senior R&D Engineer based in Wuhan with 14 years of experience building and maintaining robust backend systems, developer tooling, and packaging across Python, Haskell, and Linux ecosystems. He has led architecture and operations as a CTO and Head Systems Architect, designing core product backends, selecting technology stacks, and managing production Linux and MongoDB infrastructure. An active open-source maintainer, Felix has contributed to high-profile projects like GHC, Pandoc, Certbot, mitmproxy and the Haskell Language Server—often improving build systems, dependency compatibility, and cross-version portability. His work blends hands-on development, QA/test automation, and documentation, showing attention to both code health and developer experience. Comfortable across DevOps and research-oriented R&D, he also engages with platform-level problems such as compiler and crypto-tooling compatibility. Quirky hints in his profiles—Arch Linux developer and RISC-V porter—underscore a pragmatic tinkerer mindset that favors low-level interoperability and reproducible builds.
14 years of coding experience
6 years of employment as a software developer
Wuhan No.6 Middle SchoolFull Stack Web Development Certification, Computer Software Engineering, Full Stack Web Development Certification, Computer Software Engineering at Free Code CampBachelor of Engineering (B.E.), Automation Engineer Technology/Technician, Bachelor of Engineering (B.E.), Automation Engineer Technology/Technician at Huazhong University of Science and Technology
English, Chinese
Stackoverflow
15,049reputation
1.8mreached
93answers
10questions
memcached
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pip
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ubuntu
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python
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mongodb
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json
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Github Skills (166)
dependency-management10
postgresql10
website-development10
python10
package-management10
quickcheck10
testing10
http10
proxy10
security-protocol10
ubuntu10
http-client10
exp10
scrapy10
media-player10
Programming languages (27)
Github contributions (5)
mitmproxy/mitmproxy
Jan 2016 - Nov 2020
An interactive TLS-capable intercepting HTTP proxy for penetration testers and software developers.
Role in this project:
Backend & Security Engineer
Backend & Security EngineerContributions:10 commits, 8 PRs, 16 comments in 4 years 11 months
Contributions summary:Felix primarily contributed to dependency management and security-related improvements within the mitmproxy project. They updated and allowed specific versions of cryptography, Pillow, and lxml, demonstrating an understanding of project dependencies. The user also implemented a switch from brotlipy to Brotli, fixed a bug in XML formatting, and addressed an installation instruction for Arch Linux.
http-headerpythonsslproxyja3
yesodweb/yesod
Jul 2020 - Oct 2022
A RESTful Haskell web framework built on WAI.
Role in this project:Back-end Developer
Back-end DeveloperContributions:6 commits, 6 PRs, 3 comments in 2 years 2 months
Contributions summary:Felix primarily focused on maintaining the Haskell web framework, Yesod. Their contributions involved dropping dependencies, ensuring compatibility with newer versions of `template-haskell`, and bumping the project's version. They also made a small correction to a description in a related package. These changes indicate a focus on keeping the core framework functional and up-to-date.
apirestfulhaskellframeworkwebframework
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