Mingda Sun

About Mingda Sun

I have been working in cloud computing for over 8 years, particularly in cloud storage, where I gained strong system programming skills (covering major programming languages) and discovered my passion for constructing distributed storage systems. I have built systematic knowledge and work experience around it, especially databases (from database internals to database as a service).Currently, I am working on designing and building an in-house VectorDB at eBay.

Experience

1. Member of Technical Staff 2

   eBay

   Oct 2025 — Present · San Jose, CA, US

   Architect and deliver in-house VectorDBPropose a datalake-like architecture (build immutable index offline and then pick up by query engine)Introduce index segment concept and different sharding strategiesLeverage Spark to partition and generate index snapshotsRefactor the KnnEngine used in both building and querying phases• Design real-time index search having an LSMT-like merging mechanism (patent pending)• Mentor interns to benchmark and evaluate the index quality by developing a recall job

Education

• Western University

  Master of Science - MS, Computer Science - Distributed Systems

  2017 — 2019

• Liaoning University of Petroleum and Chemical Technology

  Bachelor of Engineering - BE, Computer Software Engineering

  2009 — 2013

• Northeastern University (CN)

  Bachelor's degree, Business Management

  2011 — 2014