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Kamil Skwarczynski

PROFILE

Kamil Skwarczynski

Kamil Skwarczynski led the engineering and ongoing development of the MaCh3 and MaCh3Tutorial repositories, building a robust scientific computing platform for statistical analysis and simulation. He architected and implemented core features such as MCMC processing, predictive plotting, and multi-dimensional binning, focusing on reproducibility, performance, and maintainability. Using C++, Python, and ROOT, Kamil refactored legacy code, introduced smart pointer memory management, and optimized CI/CD pipelines for reliable deployment. His work addressed complex data analysis challenges, improved GPU acceleration, and streamlined configuration through YAML-driven workflows. The resulting codebase demonstrates depth in algorithm design, numerical accuracy, and scalable, testable software engineering.

Overall Statistics

Feature vs Bugs

63%Features

Repository Contributions

1,121Total
Bugs
259
Commits
1,121
Features
436
Lines of code
5,550,862
Activity Months19

Your Network

48 people

Shared Repositories

48

Work History

April 2026

30 Commits • 18 Features

Apr 1, 2026

April 2026 performance highlights across MaCh3 and MaCh3Tutorial: delivered stability-driven refactors, feature enhancements, and documentation improvements that strengthen maintainability, visualization, and deployment readiness. Key outcomes include dependency alignment (NuOscillator bump) and platforms-wide Python enforcement, streamlining of the sampling pipeline (apply cuts within a single SampleHandler), and plotting/logging coherence (transferring NuOsc counts to the MaCh3 logger, PlottingManager usage, and plotting utility refactors). Tutorial improvements added event-rate calculations and ensured numeric types for oscillation parameters to fix compilation issues. Documentation updates (Readme and contributing guidelines) improve onboarding and contributor experience. These changes reduce surface area, improve build reliability, and enable more flexible data visualization and Python-centric tooling.

March 2026

64 Commits • 28 Features

Mar 1, 2026

March 2026 performance highlights across MaCh3 and MaCh3Tutorial focused on delivering robust features, strengthening reliability, and enhancing development tooling to drive business value. The month saw substantial feature work, significant stability improvements, and improvements to CI/testing that enable faster, safer iteration.

February 2026

68 Commits • 31 Features

Feb 1, 2026

February 2026 monthly summary: Delivered measurable improvements across MaCh3Tutorial and MaCh3, focusing on plotting/analysis capabilities, robustness, and developer experience. Key features include enhanced kinematic plotting and binning with dynamic binning and clarified StyleConfig.yaml, unbinned oscillation testing support, and refreshed tutorials/docs reflecting sigma handling changes. Implemented internal benchmarking, RAM tracking, and low-memory CI tests, plus targeted maintainability enhancements (code refactors, sanitizers, and build improvements). These changes reduce analysis turnaround, improve accuracy of histograms and post-prediction workflows, and strengthen CI/test coverage.

January 2026

60 Commits • 22 Features

Jan 1, 2026

January 2026 highlights substantial progress in data analysis capabilities, plotting quality, and build/release reliability across MaCh3 and MaCh3Tutorial. Delivered ROOT-free nominal binning and multi-dimensional binning groundwork, ported PiePlot, enhanced plotting and labeling, and fortified documentation, bindings, and CI automation. These changes reduce dependencies, improve reproducibility, and enable safer non-GPU and future N-dimensional analytics, delivering measurable business value through faster insights and more maintainable code.

December 2025

31 Commits • 15 Features

Dec 1, 2025

December 2025 performance summary for Mach3 software across MaCh3Tutorial and MaCh3 repositories. Delivered targeted features and critical fixes that improve reliability, analysis accuracy, and debugging traceability, while expanding test coverage and CI capabilities. Key features delivered: - PlotLLH path fix in MaCh3CLI: corrected binaries directory usage to ensure the PlotLLH command runs against the proper MaCh3 installation. - MCMC plotting usability improvements: adjusted plotting parameters to accommodate empirical priors, increasing accuracy of visualizations. - PCA Testing Framework Enhancements: added multiple test configurations and enhanced outputs to validate PCA behavior under various configurations and thresholds. - PrintIntegralCI output enhancements: introduced detailed debug files with integral breakdowns across sample configurations for better traceability. - Predictive Validation Enhancements (2D post-prediction): updated logic to support 2D post-prediction analysis for richer data insights. Major bugs fixed: - PlotLLH path issue resolved and compile-time stability improvements via PrintRates compatibility fix. - Do not use bitwise operations; improved memory management in ROOT fixes. - Improved YAML comparison messaging and predictive code stability (prior runs without extra steps). - Ridge plot title print fix and Xsec removal; prevent counter double-increment; adaptive warning naming improvements. - Suppressed noisy ROOT warnings; disabled archiving of archives to reduce noise and overhead. - Bot-spam prevention during breaks and overall MCMC/M3 chain handling improvements for readability and performance. Overall impact and accomplishments: - Increased reliability and correctness of data analysis pipelines, with stronger CI coverage and traceability. - Faster, more robust debugging and validation workflows, enabling researchers to trust results across PCA, MCMC, and predictive analyses. - Reduced build and runtime issues, enabling smoother iteration cycles and faster feature delivery. Technologies/skills demonstrated: - Python tooling and scripting for testing, CI, and data validation; C++/ROOT memory management and code hygiene; GPU code refactoring to class members; MCMC, PCA, and predictive analytics workflows; robust debugging, logging, and messaging improvements; CI scaffolding for adaptive covariance and flexible parameters.

November 2025

34 Commits • 7 Features

Nov 1, 2025

November 2025 performance summary: Completed major feature deliveries and stability fixes across MaCh3 and MaCh3Tutorial, delivering business-value improvements in data visualization, analysis reproducibility, and deployment reliability. Key features include Advanced Plotting Enhancements (robust error handling, memory management, support for variable input files and labels, improved axis titles, pad management, violin plots, and flexible predictive plotting). MCMC Processing Robustness and GPU Acceleration reorganized GPU processing for better resource management and const correctness. Oscillation Parameter Handling and Sampling Index Fix introduced flexible handling of oscillation weights and corrected sample-loading channel indexing to ensure reproducible parameter mapping. CI/CD Automation, Documentation, and Code Quality Improvements streamlined builds, auto-generated docs via CMake, cleaned up disk usage, and added YAML error messages for better maintainability. In MaCh3Tutorial, Tutorial and Analysis Workflow Enhancements added per-sample LLH scans and multi-osc-channel support, with covariance/adaptive algorithm improvements and documentation/readability enhancements. Overall this work improves data visualization fidelity, analysis reproducibility, and developer productivity, while reinforcing scalable, GPU-accelerated workflows and robust CI/CD practices.

October 2025

26 Commits • 9 Features

Oct 1, 2025

October 2025: Delivered substantive end-to-end enhancements across MaCh3 and MaCh3Tutorial, focusing on visualization, predictive analytics, data handling, and reliability improvements. Key features include a new Plot Sigma Variation Visualization executable to compare sigma variations across dials and samples, and the Predictive Plotting suite (PredictivePlotting) enabling MC-to-data overlays with ratio error propagation and prior/posterior predictive visualizations; YAML/config-driven refinements implemented in follow-up commits. CI pipeline optimization for ICPX reduced disk usage and unnecessary triggers, improving build reliability. Significant Fitting and MCMC Core work introduced precision enhancements (doubles), smarter memory management via smart pointers, detection of highly correlated parameters before adaptation, verbose logging, and likelihood calculation optimizations. Sample handling and binning were enhanced with a renamed API, name-based histogram retrieval, a GetSampleIndex helper, and YAML-configurable BinningHandler with cleanup. In MaCh3Tutorial, Sigma Variation plotting support, Predictive Plotting integration, Neutral Current-like samples, and expanded code quality/testing infrastructure were added. Overall, this month increased analytical capability, reproducibility, and developer productivity while delivering tangible business value through robust uncertainty quantification, faster validation, and more reliable CI.”,

September 2025

100 Commits • 33 Features

Sep 1, 2025

Month: 2025-09 Overview: A focused set of feature deliveries, stability improvements, and documentation enhancements across MaCh3 and MaCh3Tutorial. The work strengthened core capabilities for MCMC analysis, improved external MaCh3 integration readiness, and elevated overall build and test quality, enabling faster deployment, better user demonstrations, and more reliable analytics pipelines.

August 2025

41 Commits • 19 Features

Aug 1, 2025

In August 2025, MaCh3 and MaCh3Tutorial delivered tangible business value through metadata enhancements, diagnostics improvements, stability fixes, and multi-sample readiness. Key outcomes include the metadata refactor for sample management, enhanced spline diagnostics, resilient plotting with sanitizers, memory-safe plotting optimizations, and performance improvements for multi-sample binning and spline loading. These efforts reduce risk, improve data quality, and enable scalable multi-sample analyses across products.

July 2025

76 Commits • 30 Features

Jul 1, 2025

July 2025 performance summary for MaCh3 and MaCh3Tutorial focused on reliability, maintainability, and enabling release readiness. The work delivered targeted safety of numerical routines, improved error messaging and documentation, and CI-enabled workflows to shorten release cycles. Key technical achievements include robust reweighting configuration, correctness fixes in submatrix operations, initial MCMC and p-value tooling, CI enhancements for predictive validations and adaptive workflows, and release-ready groundwork with compiler/standard improvements and memory/performance optimizations. Business value was achieved through reduced production risk (safer reweighting and IO efficiency), clearer developer feedback (YAML error messages and docs), and faster iteration and release cycles through CI improvements.

June 2025

66 Commits • 27 Features

Jun 1, 2025

June 2025 monthly summary for MaCh3 and MaCh3Tutorial focusing on robustness, performance, and maintainability across PCA validation, binning, covariance handling, and CI improvements. Delivered key features and fixed critical issues enabling more reliable validation workflows and faster analysis iteration.

May 2025

125 Commits • 45 Features

May 1, 2025

May 2025 performance summary for mach3 software development across MaCh3Tutorial and MaCh3 repositories. Focused on delivering robust CI, oscillator integration, PCA/parameter handling enhancements, and automation around testing and documentation. These efforts reduced build downtime, increased test coverage, improved validation, and enabled faster release readiness across the project.

April 2025

38 Commits • 20 Features

Apr 1, 2025

April 2025 performance highlights: strengthened CI and YAML handling, improved tutorial data and MCMC stability, hardened GPU configurations, and advanced YAML merging capabilities across MaCh3Tutorial and MaCh3. These changes deliver measurable business value by increasing pipeline reliability, ensuring reproducible simulations, and enabling safer deployment in GPU-enabled environments, while simplifying contributor workflows and code quality. Key outcomes include robust CI validation for YAML operations, expanded tutorial data coverage, default dual-GPU enablement with safety checks, stricter threading controls, and safer YAML management across the stack.

March 2025

3 Commits • 1 Features

Mar 1, 2025

March 2025, MaCh3 (mach3-software/MaCh3): Delivered a critical correctness fix for the spline flatness check and substantial numerical backend optimizations that raise accuracy and throughput, and lay groundwork for CUDA-enabled acceleration. Key work includes switching the spline flatness calculation to use knot y-values, and performance-oriented changes to the GetLikelihood loop, oscillator updates, and refined spline evaluation. These changes improve reliability of likelihood computations, reduce CPU cache misses, and enable future GPU acceleration.

February 2025

76 Commits • 29 Features

Feb 1, 2025

February 2025 monthly summary for the MaCh3 platform across MaCh3, MaCh3Tutorial, and MaCh3_DUNE. Focused on delivering a safer, faster, and more configurable product with cross‑platform stability and improved developer experience. Key architectural work underpins future feature velocity, while targeted CI/build improvements reduce risk in downstream releases.

January 2025

122 Commits • 47 Features

Jan 1, 2025

In January 2025, the MaCh3 project delivered foundational feature work, reliability improvements, and release-prep across MaCh3Tutorial and MaCh3. The focus was on making the build and CI more robust, expanding benchmarking and testing capabilities, and laying groundwork for detector-ID handling and better downstream integration. Key activities included exploratory work on histogram utilities (TH2Poly), initial ATM tutorial implementation, build-system hygiene, and enhanced diagnostics. The work also advanced code quality, documentation, and release readiness, while tightening stability through logging improvements and targeted bug fixes.

December 2024

69 Commits • 29 Features

Dec 1, 2024

December 2024 performance summary for MaCh3 software portfolio. Delivered a set of high-value features and critical bug fixes across MaCh3Tutorial and MaCh3, with a strong emphasis on CI reliability, test coverage, memory safety, and documentation. The work laid the foundation for more robust experimentation, faster release cycles, and improved developer onboarding.

November 2024

71 Commits • 20 Features

Nov 1, 2024

November 2024 monthly summary for MaCh3 and MaCh3Tutorial: - Delivered core features and stability improvements across MaCh3 and MaCh3Tutorial, with a strong emphasis on business value, code quality, and maintainability. Key outcomes include feature delivery, robust bug fixes, performance and CI/CD enhancements, and improved documentation/tutorials. - Focus areas spanned feature work, interoperability, statistical workflow enhancements, and CI/DevOps alignment to support faster, safer releases.

October 2024

21 Commits • 6 Features

Oct 1, 2024

2024-10 Monthly Summary: Delivered key features across MaCh3Tutorial, MaCh3, and DUNE.MaCh3_DUNE with a focus on visualization quality, reproducible builds, and robust runtime behavior. Strengthened data visualization capabilities with MatrixPlotter enhancements, expanded sample/tutorial tooling, and tightened CI/versioning; fixed critical thread-safety issues; modernized codebase with CI improvements and comprehensive testing; and performed targeted cleanup to simplify the DUNE codebase, setting the stage for reliable, scalable development and faster feature delivery.

Activity

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Quality Metrics

Correctness86.4%
Maintainability86.0%
Architecture81.4%
Performance79.4%
AI Usage21.6%

Skills & Technologies

Programming Languages

BashBibTeXCC++CMakeCSSCUDADockerfileDoxyfileDoxygen

Technical Skills

API DesignAPI IntegrationAPI designAlgorithm DesignAlgorithm ImplementationAlgorithm OptimizationAlgorithm RefinementAlgorithm TuningAlgorithm designAutomationBackend DevelopmentBash ScriptingBash scriptingBayesian InferenceBayesian Statistics

Repositories Contributed To

3 repos

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

mach3-software/MaCh3

Oct 2024 Apr 2026
19 Months active

Languages Used

C++CMakeMarkdownShellYAMLBashBibTeXDockerfile

Technical Skills

Build System ConfigurationBuild SystemsC++C++ DevelopmentCI/CDClass Design

mach3-software/MaCh3Tutorial

Oct 2024 Apr 2026
18 Months active

Languages Used

C++CMakeYAMLtxtBashMarkdownPythonROOT

Technical Skills

Build System ConfigurationBuild SystemsC++C++ DevelopmentCI/CDCMake

DUNE/MaCh3_DUNE

Oct 2024 Feb 2025
2 Months active

Languages Used

C++PythonCMake

Technical Skills

Build System ManagementCode RefactoringData Analysis ToolsScriptingBuild System Configuration