Andrii Rosa
Software Engineer at Meta
Cambridge, Massachusetts, United States
Summary
🤩
Rockstar🎓
Top SchoolAndrii Rosa is a software engineer with 11 years of experience building and optimizing distributed data systems and back-end services, currently at Meta in Cambridge, MA. He has deep hands-on experience contributing to high-profile open-source projects like Trino and Presto (distributed SQL engines) and Velox, focusing on query behavior, memory accounting, and robust C++ execution engine fixes. Andrii combines large-scale systems work at companies such as Starburst and Teradata with entrepreneurial chops as co-founder of a SaaS app screenshot tool, demonstrating both product intuition and low-level engineering rigor. His contributions show a pattern of improving stability and correctness—fixing memory leaks, enhancing stats collection, and adding authentication/configuration features—indicative of an engineer who tightens both performance and operational safety. Trained in applied mathematics, he brings analytical depth to practical system design and a preference for addressing subtle, production-critical bugs that others might miss.
11 years of coding experience
12 years of employment as a software developer
Master's degree, Applied Mathematics, Master's degree, Applied Mathematics at Lviv Ivan Franko National University
English, Polish, Russian, Ukrainian
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (36)
algorithm10
algorithms10
c-language10
data-engineering10
testing10
memory-management10
configuration-management10
query-optimization10
authentication10
user-authentication10
big-data10
data-management10
data-structure10
java10
javas10
Programming languages (8)
Github contributions (5)
trinodb/trino
Mar 2022 - Jan 2023
Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (https://trino.io)
Role in this project:
Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:1183 reviews, 124 commits, 244 PRs in 10 months
Contributions summary:Andrii contributed to the Trino query engine by implementing and modifying functionality related to data processing, specifically focusing on the behavior of array and map data types when null values are present. The user also made changes to optimize and correct statistics collection, including improving memory accounting. Furthermore, the user introduced changes supporting predicate pushing for complex data types, indicating involvement in query optimization related tasks.
prestodbdbmsindexingjdbcbigdata
prestodb/presto
Jun 2015 - Jul 2021
The official home of the Presto distributed SQL query engine for big data
Role in this project:Back-end Developer
Back-end DeveloperContributions:504 reviews, 761 commits, 798 PRs in 6 years 2 months
Contributions summary:Andrii made significant contributions to the Presto query engine, focusing on improvements and optimizations. These contributions involved addressing memory leaks related to failed queries, enabling the stats calculator by default, and improving stability of the system. The user also worked on enhancements for improved code maintainability and robustness, as well as correcting minor errors.
distributed-sqlquerybigdataquery-enginesql
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