Jonathan Chen
Toronto, Ontario, Canada
Summary
🤩
Rockstar🎓
Top SchoolJonathan Chen is a Toronto-based software engineer with three years of hands-on experience focused on infrastructure and backend systems. While completing a Computer Science degree at Western University, he contributed to the Apache DataFusion SQL query engine—fixing bugs, improving reliability, and adding documentation and function aliases that enhance usability for data workloads. He has practical internship experience at startups like Embucket and Tonbo IO, where he applied backend and infrastructure skills in production-like environments. Jonathan brings a detail-oriented approach to stabilizing complex systems and a demonstrated interest in open-source collaboration that complements his academic training.
3 years of coding experience
1 year of employment as a software developer
Bachelor of Science - BS, Computer Science, Bachelor of Science - BS, Computer Science at Western University
Github Skills (10)
fusion10
query-engine10
rust10
sql10
arrow-js9
arrow-keys9
arrows9
data-structures8
documentation8
data-structure8
Programming languages (6)
Github contributions (5)
apache/datafusion
Oct 2024 - Feb 2025
Apache DataFusion SQL Query Engine
Role in this project:
Back-end Developer
Back-end DeveloperContributions:43 reviews, 69 PRs, 146 comments in 4 months
Contributions summary:Jonathan primarily contributed to the Apache DataFusion SQL Query Engine by fixing bugs and enhancing existing functionalities. Their work included addressing a panic in the `approx_percentile_cont_with_weight` function and making minor comment changes within the SQL folder. They also migrated and added documentation for crypto, aggregate, and array functions, alongside the addition of the `current_timestamp` alias. Their commits demonstrate a focus on improving the reliability and usability of the query engine.
querypythonquery-enginedataframerust
jonathanc-n/iceberg-rust
Dec 2024 - Apr 2025
Apache Iceberg
Contributions:155 pushes, 93 branches in 3 months
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