Milosz Kosmider
Software Development Engineer at Amazon
Old Toronto, Ontario, Germany
Summary
👤
Senior🎓
Top SchoolMilosz Kosmider is a seasoned Software Development Engineer with 13 years building robust search and fulfillment systems at Amazon, now working from Berlin on search infrastructure. He brings deep backend expertise—demonstrated by meaningful contributions to the widely used psycopg2 PostgreSQL adapter, where he implemented named-parameter support for stored procedures, tightened type-safety, and expanded test coverage. Comfortable across the stack, he’s shipped production services for large-scale e-commerce and retail systems and has a knack for pragmatic refactoring and memory-safe C/Python integrations. Trained in mathematics and computer science at the University of Ottawa, he combines analytical rigor with a steady, decency-first work style that teammates describe as reliably solid.
13 years of coding experience
12 years of employment as a software developer
Bachelor's Degree, Mathematics and Computer Science, Magma con carne, Bachelor's Degree, Mathematics and Computer Science, Magma con carne at University of Ottawa
English, French, Polish, German
Github Skills (10)
c1710
databases10
driver10
postgresql10
c1110
python10
database10
sql9
lib9
testing8
Programming languages (5)
Github contributions (5)
psycopg/psycopg2
May 2014 - Dec 2015
PostgreSQL database adapter for the Python programming language
Role in this project:
Back-end Developer
Back-end DeveloperContributions:8 commits, 2 PRs, 9 comments in 1 year 6 months
Contributions summary:Milosz primarily focused on enhancing the `psycopg2` library, specifically addressing stored procedure calls. They implemented support for named parameters using dictionaries in `callproc`, including type checking and sanitization. Additional changes involved memory management, bug fixes, and compliance with coding standards. Furthermore, the user incorporated compile-time checks for PostgreSQL versions and expanded test coverage.
database-adapterpython-programmingdriverpythonpostgresql-database
mrmilosz/atomicity
May 2013 - Jul 2013
Contributions:30 commits in 2 months
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