Dan Wang
Senior Software Engineer at FreeWheel
Dongcheng District, Beijing, China
Summary
🤩
Rockstar🎓
Top SchoolDan Wang is a Senior Software Engineer based in Dongcheng District, Beijing with 11 years of experience building reliable backend systems for large-scale products. He has held senior engineering roles at FreeWheel and Baidu after beginning his career at Sina, bringing deep production experience across advertising and internet platforms. His open-source contributions to Apache Pegasus demonstrate hands-on expertise in distributed key-value storage—improving memtable/index costing, RocksDB portability, replication-factor management, and TTL robustness. Comfortable navigating complex distributed systems and storage internals, he focuses on stability, performance, and practical engineering trade-offs. He holds an M.Eng. in Computer Science from the University of Science and Technology Beijing and a B.Eng. from Nanchang University. Colleagues describe him as a pragmatic problem-solver who pairs solid foundational knowledge with steady, long-term ownership.
11 years of coding experience
5 years of employment as a software developer
Bachelor of Engineering (B.Eng.), Computer Science, Bachelor of Engineering (B.Eng.), Computer Science at Nanchang UniversityMaster of Engineering (M.Eng.), Computer Science, Master of Engineering (M.Eng.), Computer Science at University of Science and Technology Beijing
English, Chinese, Japanese
Github Skills (7)
rocksdb10
c-language10
key-value-store10
cprogramming-language10
distributed-database10
back-end-development10
thrift8
Programming languages (3)
Github contributions (5)
apache/incubator-pegasus
Dec 2020 - Dec 2022
Apache Pegasus - A horizontally scalable, strongly consistent and high-performance key-value store
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 837 reviews, 90 commits in 2 years
Contributions summary:Dan contributed to the Apache Pegasus key-value store, focusing on improving its internal workings and stability. They implemented features such as costing memtables and indexes, supporting portable RocksDB binary builds, and fixing cluster name issues within the DDL client. Furthermore, they also worked on enhancing the replication factor management by adding RPCs to modify it. The user also improved the robustness of the system by addressing issues related to the TTL of data.
scalabledbmsnosqlapacheconsistent
empiredan/pegasus
May 2020 - Apr 2025
A distributed key-value storage system developed and maintained by Xiaomi Cloud Storage Team.
Contributions:1418 pushes, 228 branches, 1 tag in 4 years 11 months
cloud-storagestoragexiaomikey-valuedistributed
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