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Maciej Wyrzuc

PROFILE

Maciej Wyrzuc

Maciej Wyrzuc developed and enhanced core scheduling components in the kubernetes/kubernetes repository, focusing on performance, efficiency, and reliability. He implemented graceful preemption for pods in the prebind phase, reducing API server load and accelerating rescheduling by introducing a dedicated data structure and updating scheduling logic in Go. Maciej improved scheduler performance testing by modularizing tooling, refining metrics collection, and updating documentation for reproducibility. He also contributed API extensions for workload-aware preemption, enabling more accurate resource allocation. His work demonstrated depth in distributed systems, concurrency, and backend development, resulting in more maintainable, scalable, and observable Kubernetes scheduling workflows.

Overall Statistics

Feature vs Bugs

86%Features

Repository Contributions

9Total
Bugs
1
Commits
9
Features
6
Lines of code
6,570
Activity Months3

Work History

February 2026

5 Commits • 2 Features

Feb 1, 2026

February 2026 monthly performance-focused summary for Kubernetes workstreams. Highlighted efforts centered on hardening scheduling tooling, improving scheduling accuracy, and enabling workload-aware preemption through API extensions. Deliveries emphasize readability, maintainability, and scalable workload management, aligning with platform-level reliability and efficiency goals.

December 2025

2 Commits • 2 Features

Dec 1, 2025

2025-12 monthly summary for kubernetes/kubernetes focusing on scheduler enhancements, observability improvements, and resource management optimization.

November 2025

2 Commits • 2 Features

Nov 1, 2025

Month 2025-11: Key contributions to kubernetes/kubernetes focused on scheduler performance testing and prebind-phase preemption enhancements. Improved testing documentation for profiling in scheduler performance tests; README now clearly shows how to run tests with profiling, reducing setup friction and ensuring reproducible results. Implemented graceful preemption for pods in the prebind phase by adding a dedicated prebind-pod data structure and updating scheduling logic to allow preemption without deleting pods from the API server, enabling faster rescheduling with lower API-server load. This work also reduces delete pressure on the API server and improves scheduling throughput.

Activity

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Quality Metrics

Correctness86.6%
Maintainability84.4%
Architecture84.4%
Performance82.2%
AI Usage20.0%

Skills & Technologies

Programming Languages

GoMarkdownYAML

Technical Skills

API DevelopmentBackend DevelopmentCloud ComputingConcurrencyDistributed SystemsGoGo programmingKubernetesSoftware ArchitectureTestingbackend developmentdocumentationperformance profilingtesting

Repositories Contributed To

2 repos

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

kubernetes/kubernetes

Nov 2025 Feb 2026
3 Months active

Languages Used

GoMarkdownYAML

Technical Skills

ConcurrencyDistributed SystemsGoKubernetesdocumentationperformance profiling

kubernetes/enhancements

Feb 2026 Feb 2026
1 Month active

Languages Used

GoMarkdownYAML

Technical Skills

API DevelopmentCloud ComputingGoKubernetes