Jung-sang Ahn
Senior Member Of Technical Staff at eBay
San Jose, California, United States
Summary
🤩
Rockstar🎓
Top SchoolJung-sang Ahn is a Senior Member of Technical Staff based in San Jose with 12 years of experience designing and shipping high-performance distributed storage and replication systems. He holds a Ph.D. and has led development of in-house database cores at eBay, building replication engines (Paxos, Raft and variants), storage engines (B+tree, LSM, append-only logs) and multi-datacenter key-value and log services. Earlier he was the original inventor of ForestDB at Couchbase and has deep low-level expertise in B-tree/LSM implementations, I/O optimizations and thread-safe consensus code, with notable open-source contributions to eBay’s NuRaft and Couchbase’s ForestDB. Known for turning research-grade index structures into production systems, he also pairs rigorous academic background with pragmatic API and testing improvements that make distributed primitives more robust and maintainable.
12 years of coding experience
11 years of employment as a software developer
Daejeon Science High SchoolBachelor’s Degree, Computer Science, Bachelor’s Degree, Computer Science at Korea Advanced Institute of Science and Technology
Github Skills (19)
debug10
c-language10
key-value-store10
testing10
distributed-systems10
c1110
data-structure10
c1710
data-structures10
raft10
cprogramming-language10
concurrency10
filesystem9
consensus9
memory-management9
Programming languages (3)
Github contributions (5)
couchbase/forestdb
Jul 2013 - Jul 2017
A Fast Key-Value Storage Engine Based on Hierarchical B+-Tree Trie
Role in this project:
Back-end Developer
Back-end DeveloperContributions:493 commits in 4 years
Contributions summary:Jung-sang contributed to the core functionality of the ForestDB key-value storage engine. Their work focused on the low-level B-tree data structure, including the implementation of new B-tree features, enhancements to iterator functionality, and optimizations for performance improvements. Their commits demonstrate a strong understanding of data storage and index structures, with contributions spanning areas such as key-value operations, metadata handling, and code for data compaction.
nosql-databasehierarchicalstoragepersistent-storagetrie
eBay/NuRaft
Jul 2019 - Nov 2022
C++ implementation of Raft core logic as a replication library
Role in this project:Back-end Developer
Back-end DeveloperContributions:9 releases, 200 reviews, 178 commits in 3 years 3 months
Contributions summary:Jung-sang primarily focused on the core logic of the Raft consensus algorithm within the C++ implementation. They addressed critical bugs related to thread safety, and fixed compiler errors. Additionally, the user enhanced the codebase by adding testing jobs, improving code coverage and by making the existing code compatible with new features such as the auto-forwarding system. Moreover, they refactored and updated APIs for enhanced functionality.
cppavailabilityconsensuspaxosdistributed-systems
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.