Contact
Work Experience
Dropbox
Summer 2015
- Intern on the Dropbox for Business team
- Implemented the permissions model for nested shared folders
- Re-designed the user authentication flow to support proper logging and permissions checks
- Performance improvements to critical server endpoints
Summer 2014
- Intern on Dremel, a high-performance SQL query engine for web-scale data analysis
- Developed a new type of lookup join for joining a large partitioned table and a smaller table where a hash join would incur too much overhead
- Implemented a lookup table on top of Google's in-memory data store capable of high distributed read and write throughput to execute the lookup joins quickly
Summer 2012, 2013
- Worked on a scalable, in-memory database
- Implemented foreign keys with referential integrity
- Contributed to the frontend dashboard
- Developed a tool to replicate between MySQL and MemSQL
- Implemented several aggregate and builtin functions
- Fixed dozens of bugs to stabilize the engine before the first public release
Research
UC Berkeley AMPLab — Haoyuan Li
2014
- Working on Tachyon, a fault-tolerant distributed file system enabling reliable file sharing at memory-speed across cluster frameworks, such as Spark and MapReduce
- Implemented fine-grained caching for columnar data
- Redesigned and optimized the filesystem metadata manager
CMU — Dave Andersen
2013
- Worked on libcuckoo, a high-speed, memory-efficient, hash table designed for high levels of concurrency
- Implemented a general purpose, industrial-quality version of the table in C++
- Improved the design to support concurrent expansion and concurrent writers
CMU — Deepak Garg
2011-2012
- Worked on a tool that can automatically find violations in patent privacy policies like HIPAA
- Implemented a concurrent policy-checking algorithm
- Created in-memory and database-backed representations of the versioned policy data structure
- Built a custom multithreaded webserver and interactive front-end