Josh Kupershmidt
Senior Software Engineer at Amazon
Somerville, Massachusetts, United States
Summary
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RockstarJosh Kupershmidt is a Senior Software Engineer with 14 years of experience building reliable, scalable web services and infrastructure, currently working on AWS Security after helping stabilize Amazon Pharmacy's core systems. He combines deep expertise in PostgreSQL, OLAP/OLTP design, and backend engineering with strong DevOps skills—terraform, ansible, CI/CD, and immutable infrastructure—to deliver production-hardened systems. A pragmatic programmer fluent in Python, C, SQL and shell, he focuses on automation and infrastructure-as-code to improve operability and reduce toil. Josh is an active open-source contributor to pg_repack, where he addressed concurrent DDL robustness and a critical data corruption issue, highlighting his attention to correctness in database tooling. Based in Somerville, MA, he brings a blend of systems-level thinking and hands-on engineering that reliably scales complex services.
14 years of coding experience
Stackoverflow
2,610reputation
436kreached
55answers
8questions
amazon-s3
top-5%
amazon-web-services
top-5%
python
top-5%
Github Skills (16)
error-handling10
database-administration10
postgresql10
index-management10
python9
c-programming9
amazon-s39
amazon-web-services9
sql9
http6
amazon-rds6
ssl6
boto6
cisco6
aws-cli6
Programming languages (9)
Github contributions (5)
reorg/pg_repack
Sep 2012 - Aug 2018
Reorganize tables in PostgreSQL databases with minimal locks
Role in this project:
Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:144 commits, 29 PRs, 41 pushes in 6 years
Contributions summary:Josh primarily contributed to the core functionality of the PostgreSQL reorganization tool. Their work focused on improving the tool's robustness, including fixes for concurrent DDL issues and improved error handling. They also enhanced the tool by adding features like the ability to repack indexes only and the ability to repack tables in specific schemas. Additionally, they addressed a critical data corruption issue.
postgresql-databaselocksdatabasesdatabasepostgres
schmiddy/aws-cdk
Mar 2023 - May 2024
The AWS Cloud Development Kit is a framework for defining cloud infrastructure in code
Contributions:1 push, 2 branches in 1 year 2 months
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