Ami Oka
Software Engineer at Jane Street
New York, New York, United States
Summary
🤩
Rockstar🎓
Top SchoolAmi Oka is a software engineer based in New York with eight years of experience specializing in systems programming, distributed systems, and database integrations. They've contributed to high-profile open-source projects such as Facebook's fbthrift and Delta Lake, implementing core field-masking functionality and refactoring Spark integrations to improve schema and metadata handling. Ami has production experience at Databricks and internships at Meta, Square, and AWS, and currently works at Jane Street, reflecting a trajectory from research and internships to critical backend engineering roles. Notably, their work on field-mask semantics spans both VM-level (HHVM) and C++ server implementations, showing a rare blend of low-level systems insight and large-scale data platform expertise.
8 years of coding experience
4 years of employment as a software developer
Bachelor's degree, Computer Science, GPA 4.00/4, Bachelor's degree, Computer Science, GPA 4.00/4 at University of Washington
English, Japanese, Chinese
Github Skills (24)
spark10
c-language10
delta-lake10
back-end-development10
hacking10
big-data10
hhvm10
java10
scala10
javas10
php10
thrift10
cprogramming-language10
data-engineering9
data-structure9
Programming languages (7)
Github contributions (5)
delta-io/delta
Nov 2023 - Apr 2025
An open-source storage framework that enables building a Lakehouse architecture with compute engines including Spark, PrestoDB, Flink, Trino, and Hive and APIs
Role in this project:
Back-end Developer
Back-end DeveloperContributions:13 reviews, 9 PRs, 10 comments in 1 year 4 months
Contributions summary:Ami primarily contributed to the Delta Lake project by refactoring and improving existing code, especially within the Spark integration. Their work involved modifying core components, including schema management, data writing operations, and data source utilities. Furthermore, the user addressed specific issues related to metadata updates and table feature handling, demonstrating a deep understanding of the project's inner workings and contributing to its stability and feature set. They also contributed to tests and fixes.
analyticsprestodbflinkbig-dataspark
facebook/fbthrift
Jun 2022 - Sep 2022
Facebook's branch of Apache Thrift, including a new C++ server.
Role in this project:Back-end Developer
Back-end DeveloperContributions:85 commits in 2 months
Contributions summary:Ami primarily contributed to the Facebook Thrift project by defining data structures and implementing core functionalities related to field masking. Their work involved defining constants and data structures for field masks within the Thrift definition language and implementing methods for retrieving and manipulating masked fields in the C++ code. These contributions included adding the ability to get field masks by field ID and adding methods to ensure, clear, and copy masked fields in schemaful and schemaless Thrift objects, providing a core set of functionalities for the new feature.
cppapache-thriftc-plus-plusapachefacebook
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