Abe Ratnofsky
Software Engineer at The Apache Software Foundation
New York, New York, United States
Summary
🤩
Rockstar🎓
Top SchoolAbe Ratnofsky is a software engineer with 11 years of experience specializing in distributed data storage and backend systems, currently focused on Apache Cassandra and storage abstractions at Netflix. He previously built full-stack features and platform tooling at Swiftly and worked on Cassandra storage at Apple, bringing practical expertise across Java, Python, Postgres, and cloud infrastructure. An active Apache Cassandra committer and contributor to the widely used cassandra-java-driver, Abe has improved SSL/TLS keystore reloading and SAN validation behavior, strengthening security and operational flexibility. He combines production-first systems thinking—on-call rotations, incident leadership, and platform templates—with a knack for shipping product-facing features alongside designers. Based in New York, he holds a Computer Science background from the University of Toronto and a track record of turning complex distributed-systems problems into reliable, maintainable solutions.
11 years of coding experience
8 years of employment as a software developer
High School Diploma, High School Diploma at Bronx High School of ScienceComputer Science, Computer Science at University of Toronto
Github Skills (9)
javas10
configuration-management10
ssl10
tls1210
tls1310
java10
cassandra-database9
cassandra9
testing8
Programming languages (10)
Github contributions (5)
apache/cassandra-java-driver
Jan 2024 - May 2026
Java Driver for Apache Cassandra®
Role in this project:
Back-end Developer
Back-end DeveloperContributions:48 reviews, 8 PRs, 1 push in 2 years 4 months
Contributions summary:Abe primarily contributed to the `cassandra-java-driver`, focusing on enhancements related to SSL/TLS configuration and keystore reloading. Their work involved modifying the `ReloadingKeyManagerFactory` to improve its handling of keystore updates and associated error messages. They also addressed issues related to DNS reverse lookups for SAN validation, adding configuration options to disable them. This user's contributions improved the driver's security and flexibility in managing SSL certificates.
cassandradriverjava
aratno/lipqn
Nov 2015 - Dec 2017
Contributions:1 PR, 16 pushes, 2 branches in 2 years 1 month
equationslipsum
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