About

Mark Callaghan is a highly experienced Distinguished Engineer with over 26 years of relevant experience in the field of databases and mathematics. Currently, he is working with MongoDB as a Distinguished Engineer and is a part of the performance team. He is responsible for optimizing the performance of large, sharded DBMS clusters that handle more than 100 million queries and disk reads per second. Prior to joining MongoDB, Mark worked as a Software Engineer at Rockset, where his focus was on transaction processing and storage efficiency. He led a team that supported large, sharded DBMS clusters and made significant contributions to improving MySQL. He also worked at Facebook as an MTS, where he continued his work on MySQL and started to do the same for MongoDB and RocksDB, a write-optimized database engine. Mark holds an MS degree in Computer Science from the University of Wisconsin-Madison, a BS degree in Computer Science from San Diego State University, and a degree in Computer Science from Rutgers University. His education and experience have given him a strong foundation in mathematics and computer science, which he has leveraged to excel in his career. Mark's tech stack includes software engineering, MySQL, and MongoDB. He is highly skilled in optimizing database performance, transaction processing, and storage efficiency. He is also an active blogger and Twitter user, where he shares his insights and keeps himself updated on the latest developments in the field. Overall, Mark Callaghan is a highly skilled and experienced professional with a strong background in databases and mathematics. He has made significant contributions to the field and continues to innovate and excel in his career.