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Cezary Miącz

PROFILE

Cezary Miącz

Czarek Miacz worked on the saleor/saleor repository, delivering backend features and reliability improvements over four months. He implemented a customized Celery broker transport for Amazon SQS, enabling fair queue processing and improved message deduplication for both FIFO and non-FIFO queues. Czarek enhanced webhook reliability by fixing argument handling and introduced cache-based deduplication to prevent repeated webhook calls after failures. He strengthened security by hiding development tooling from search engines and refactored tests to address race conditions. His work leveraged Python, AWS SQS, and Celery, demonstrating depth in backend development, configuration management, and robust error handling for production systems.

Overall Statistics

Feature vs Bugs

67%Features

Repository Contributions

6Total
Bugs
2
Commits
6
Features
4
Lines of code
1,313
Activity Months4

Work History

October 2025

1 Commits • 1 Features

Oct 1, 2025

October 2025 monthly summary for saleor/saleor focused on delivering a robust integration improvement for background task processing. Implemented a customized Celery broker transport for Amazon SQS to support fair queue processing. This addresses message grouping and deduplication for FIFO queues and enables passing MessageGroupId for non-FIFO queues, improving compatibility and reliability with SQS backends. No major bug fixes were reported this month; maintenance efforts centered on reliability and performance of the task queue integration.

August 2025

1 Commits

Aug 1, 2025

Month: 2025-08 — Concise monthly summary focusing on key accomplishments and business value for the Saleor project.

March 2025

2 Commits • 1 Features

Mar 1, 2025

March 2025 (saleor/saleor): Focused on reliability hardening and secure defaults. Key outcomes include a bug fix for Webhook Trigger Sync argument handling and the Admin Email Plugin configuration parsing with defaults, supported by targeted tests. These changes improve webhook reliability, reduce misconfiguration risks, and strengthen security posture, enabling safer deployments and smoother admin workflows. Technologies demonstrated include Python, config parsing, unit testing, and security hardening.

November 2024

2 Commits • 2 Features

Nov 1, 2024

November 2024 monthly summary for saleor/saleor: Focused on reducing exposure of development tooling and strengthening test reliability. Key work included implementing noindex, nofollow for the GraphQL Playground to prevent public indexing, and refactoring tests to improve robustness against race conditions. These changes decrease security exposure and lower risk in releases, without introducing customer-visible regressions. This month did not involve major customer-impacting bug fixes, but delivered meaningful improvements in security posture and test stability, enabling faster, safer releases.

Activity

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Quality Metrics

Correctness91.6%
Maintainability90.0%
Architecture86.6%
Performance73.4%
AI Usage20.0%

Skills & Technologies

Programming Languages

HTMLPython

Technical Skills

API IntegrationAWS SQSBackend DevelopmentCachingCeleryConfiguration ManagementError HandlingKombuMessage QueuesPlugin DevelopmentPythonRefactoringSEOTestingWeb Development

Repositories Contributed To

1 repo

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

saleor/saleor

Nov 2024 Oct 2025
4 Months active

Languages Used

HTMLPython

Technical Skills

PythonRefactoringSEOTestingWeb DevelopmentAPI Integration

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