Brian DeLeonardis

Fixed Income Engineering @ Citadel

Berkeley, California, United States

About

Experience

  • Citadel (Full-time · 4 yrs 6 mos)
    • Engineering Manager
      Nov 2024 - Present · 1 yr 8 mos

    • Software Engineer
      Jan 2022 - Nov 2024 · 2 yrs 11 mos

  • Software Engineer at MongoDB
    Aug 2020 - Jan 2022 · 1 yr 6 mos

    - 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 at UC Berkeley Electrical Engineering & Computer Sciences (EECS)
    Aug 2018 - May 2020 · 1 yr 10 mos

    Taught weekly discussion sections, help office hours, and handled various course logistics (exams, cheating scandals, etc.)

  • Software Engineering Intern at MongoDB
    May 2019 - Aug 2019 · 4 mos

    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 at MongoDB
    May 2018 - Aug 2018 · 4 mos

    Added support for common table expressions to BI Connector (a tool that translates SQL to MongoDB's query language)