James Leddy
Site Reliability Engineer at Raised by Tigers
New York, New York, United States
Summary
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Rockstar🎓
Top SchoolJames Leddy is a Site Reliability Engineer with nine years of experience building and operating large-scale systems in financial services and consumer tech, currently focused on reliability at MongoDB. His background spans low-level database work at Bloomberg—where he improved SQL request logging and built a SQL replay tool for their distributed RDBMS—to production engineering at Facebook and Linux infrastructure at Citadel. Proficient in Python, Perl, open source tooling, and storage systems, he combines systems programming chops with pragmatic SRE practices. Based in New York, he also wears creative hats as a webmaster and violinist, a hint at his blend of technical precision and unconventional curiosity.
9 years of coding experience
12 years of employment as a software developer
Bachelors, Computer Science, Bachelors, Computer Science at Binghamton UniversityBS, Computer Science, BS, Computer Science at State University of New York at Binghamton
Stackoverflow
111reputation
2kreached
6answers
1question
Github Skills (20)
databases10
c1110
c1710
sql10
logging10
relational-databases10
sql-database10
database10
debug9
debugging9
performance-optimization9
curve6
smoothing6
android6
google-maps6
Programming languages (6)
Github contributions (5)
bloomberg/comdb2
Dec 2016 - Jul 2017
Bloomberg's distributed RDBMS
Role in this project:
Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:28 commits, 20 PRs, 10 pushes in 7 months
Contributions summary:James primarily contributed to the `reqlog` module, a critical component of the Bloomberg's distributed RDBMS. Their work involved refactoring and optimizing the logging mechanism, including renaming variables for clarity and replacing arena allocators with standard `malloc`/`strdup`. They also added functionality to log every SQL request and implemented a tool, `cdb2_sqlreplay`, to replay SQL logs. These changes improved the clarity, performance, and debugging capabilities of the database's logging system.
bloombergdatabaserdbmsdistributed
jmleddy/comdb2
Jun 2017 - Apr 2018
Bloomberg's distributed RDBMS
Contributions:19 pushes, 13 branches in 11 months
bloombergdatabaserdbmsdistributed
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