# Brian DeLeonardis

> Software Engineer @ Citadel

Location: Berkeley, California, United States
Profile: https://flows.cv/briandeleonardis

## Work Experience
### Software Engineer @ Citadel
Jan 2022 – Present | New York

### Software Engineer @ MongoDB
Jan 2020 – Jan 2022 | New York, United States
- Member of Atlas Data Lake team, a product that allows customers to query S3 with MongoDB's query language
- Built a distributed work limiter that increased system stability, improved performance, and saved computing resources for certain commands
- Wrote a BSON to Parquet writer that performed 25% better than a popular open source library and is more extensible

### TA for CS 186, Introduction to Databases @ UC Berkeley Electrical Engineering & Computer Sciences (EECS)
Jan 2018 – Jan 2020 | Berkeley, CA
Taught weekly discussion sections, help office hours, and handled various course logistics (exams, cheating scandals, etc.)

### Software Engineering Intern @ MongoDB
Jan 2019 – Jan 2019 | Greater New York City Area
Implement various optimizations for $lookup in Atlas Data Lake (a tool that allows customers to query S3 using MongoDB's query language)

### Software Engineering Intern @ MongoDB
Jan 2018 – Jan 2018 | Greater New York City Area
Added support for common table expressions to BI Connector (a tool that translates SQL to MongoDB's query language)

### Software Engineering Intern @ The Casey Group
Jan 2017 – Jan 2017 | Parsippany NJ
Created a Dashboard webapp that allowed support people to more efficiently assist customers.


## Education
### Bachelor's degree in Computer Science
University of California, Berkeley


## Contact & Social
- LinkedIn: https://linkedin.com/in/brian-deleonardis

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Source: https://flows.cv/briandeleonardis
JSON Resume: https://flows.cv/briandeleonardis/resume.json
Last updated: 2026-04-05