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Mike Zelenskyy

PROFILE

Mike Zelenskyy

Worked on the gooddata/gooddata-python-sdk repository, focusing on enhancing data processing performance and memory efficiency for analytics workflows. Developed a memory-optimized conversion path for execution responses to pandas DataFrames, introducing an opt-in flag to reduce memory usage by storing only unique headers and references. Improved metadata handling by adding column totals indexing and helper methods for better code organization. Advanced the Arrow IPC execution path with parallelization and configuration options, leveraging Python and orjson for faster schema parsing. Expanded test coverage and implemented stability fixes, including HTTP Keep-Alive improvements, to ensure reliability and maintainability in backend data engineering tasks.

Overall Statistics

Feature vs Bugs

75%Features

Repository Contributions

9Total
Bugs
1
Commits
9
Features
3
Lines of code
1,725,567
Activity Months2

Your Network

87 people

Same Organization

@gooddata.com
51

Work History

April 2026

7 Commits • 1 Features

Apr 1, 2026

April 2026 (2026-04) monthly summary for gooddata/gooddata-python-sdk. Focused on performance, reliability, and developer ergonomics, with substantial progress on the Arrow IPC path, metadata handling, and API usability, complemented by stability fixes and expanded test coverage.

September 2025

2 Commits • 2 Features

Sep 1, 2025

September 2025 (2025-09) focused on delivering performance and data-structure improvements in gooddata/gooddata-python-sdk, with an emphasis on memory efficiency and robust metadata handling to support larger analytics workflows.

Activity

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Quality Metrics

Correctness95.6%
Maintainability86.8%
Architecture86.8%
Performance89.0%
AI Usage24.4%

Skills & Technologies

Programming Languages

Python

Technical Skills

API DevelopmentAPI developmentAPI integrationBackend DevelopmentData EngineeringDataFramesMemory OptimizationPythonPython developmentdata analysisdata engineeringdata processingloggingpandasperformance optimization

Repositories Contributed To

1 repo

Overview of all repositories you've contributed to across your timeline

gooddata/gooddata-python-sdk

Sep 2025 Apr 2026
2 Months active

Languages Used

Python

Technical Skills

API DevelopmentBackend DevelopmentData EngineeringDataFramesMemory OptimizationAPI development