David Percy
Software Engineer at Chalk
New York, New York, United States
Summary
🤩
Rockstar🎓
Top SchoolDavid Percy is a seasoned software engineer with 12 years of experience specializing in backend systems and query optimization, now based in New York. He spent over a decade at MongoDB contributing to core database internals—adding aggregation and time-series features, expressions like $binarySize/$bsonSize, and improving query execution and index management—work that touches a widely used open-source database. Currently at Chalk, he brings deep expertise in scalable data systems and practical optimization techniques to product-focused engineering. A Brown CS graduate, David pairs rigorous academic roots with hands-on contributions to critical database logic, and he has a track record of turning subtle performance challenges into reliable, maintainable features.
11 years of coding experience
Bachelor of Science - BS, Computer Science, Bachelor of Science - BS, Computer Science at Brown University
Stackoverflow
479reputation
92kreached
7answers
5questions
Github Skills (22)
aggregate10
c-language10
databases10
mongodb-database10
pipe10
pipeline10
aggregates10
cprogramming-language10
mongodb10
relational-databases10
index-management10
sql-database10
database10
query-optimization9
bson9
Programming languages (14)
Github contributions (5)
mongodb/mongo
Sep 2014 - Jan 2023
The MongoDB Database
Role in this project:
Back-end Developer
Back-end DeveloperContributions:142 commits, 1 push in 8 years 5 months
Contributions summary:David's contributions primarily involve implementing backend features and modifying core database logic within the MongoDB codebase. This includes the addition of features like including server information in explain output for aggregation and sharding, as well as expressions such as $binarySize and $bsonSize. Further contributions include creating time-series-related functionality, along with bug fixes. The user's work touches upon multiple aspects of the database's internals, including query execution, aggregation pipelines, and index management.
nosqlc-plus-plusmongodb-databasedatabasemongodb
dpercy/simple-lang
Sep 2017 - Jul 2018
Contributions:145 pushes, 6 branches in 9 months
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.