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Maciej Modzelewski

PROFILE

Maciej Modzelewski

Maciej Modzelewski contributed to the iggy-rs/iggy and apache/iggy repositories by engineering robust backend features focused on security, observability, and developer experience. He implemented end-to-end TLS/TCP encryption, modular connector configuration, and telemetry endpoints, using Rust, Java, and Gradle to ensure secure data transport and flexible deployment. Maciej modernized build systems, unified dependency management, and refactored TCP client logic for improved performance and maintainability. His work included enhancing logging, error handling, and test infrastructure, as well as exposing runtime metrics and connector versioning. These efforts resulted in more reliable releases, streamlined onboarding, and improved operational visibility across the stack.

Overall Statistics

Feature vs Bugs

96%Features

Repository Contributions

46Total
Bugs
1
Commits
46
Features
24
Lines of code
33,589
Activity Months7

Work History

March 2026

7 Commits • 3 Features

Mar 1, 2026

March 2026: Strengthened authentication, connectivity, and runtime resilience in apache/iggy, improved observability, and modernized the codebase to reduce maintenance burden and downtime risk. Deliveries focused on securing pooled TCP channels, hardening the client lifecycle, consolidating the blocking client into the async flow, expanding health metrics, and refreshing dependencies.

February 2026

7 Commits • 5 Features

Feb 1, 2026

February 2026: Delivered key cross-repo features and stability improvements for iggy-rs/iggy and apache/iggy, focusing on serialization robustness, version visibility, reproducible builds, and CI reliability. These changes improve data correctness, monitoring, developer experience, and build consistency across platforms.

January 2026

8 Commits • 4 Features

Jan 1, 2026

January 2026 (2026-01) saw a set of focused improvements in iggy-rs/iggy that strengthened security, expanded observability, and improved developer experience, while delivering tangible business value around reliability and performance visibility.

December 2025

7 Commits • 4 Features

Dec 1, 2025

December 2025: Delivered stability, performance, and observability improvements for iggy-rs/iggy. Key work included Build System Modernization and Dependency Updates, TCP Client Refactoring and Performance Improvements, Connector Status Monitoring Enhancement, and Documentation and Compatibility Updates. The efforts reduced build friction and security risk by removing the Gradle wrapper and refreshing dependencies, improved memory management and throughput in TCP paths through targeted refactoring, enhanced operational visibility with a new connector status tracking system, and kept Java SDK docs and module versions aligned with current best practices.

November 2025

14 Commits • 6 Features

Nov 1, 2025

Security-first and reliability-focused month for iggy-rs/iggy. Delivered TLS/TCP encryption across Iggy and connectors, introduced modular connector config management with HTTP dynamic config provider and unified provider across server and connectors, optimized performance via binary-serialized connector state, updated Java SDK and build tooling with dependency unification, and hardened the CI/CD process for artifact signing and publishing to Maven Nexus. These changes enhance data protection in transit, configurability, scalability, and release reliability, contributing to faster delivery cycles and lower risk in production.

August 2025

1 Commits • 1 Features

Aug 1, 2025

Monthly summary for 2025-08 for iggy-rs/iggy: Delivered cross-module Java SDK version standardization to 0.5.0 across example and core modules, establishing a single, stable development environment and reducing configuration drift. The change is captured in commit 22e9416c4c638add422687acd71b245e76de5374 (chore(java): update Java SDK version (#2072)).

February 2025

2 Commits • 1 Features

Feb 1, 2025

February 2025 (2025-02): Delivered server logging improvements for iggy (iggy-rs/iggy) to boost observability, reliability, and operator efficiency. Removed ANSI formatting from server logs and the strip-ansi-escapes dependency, disabled ANSI output for file logging, and enhanced error context for deserializing invalid commands with detailed decoding information and the unknown command code. No major bugs fixed this month; focus was on robust logging improvements to accelerate issue diagnosis and reduce operational friction.

Activity

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Quality Metrics

Correctness92.6%
Maintainability85.6%
Architecture87.4%
Performance85.6%
AI Usage27.4%

Skills & Technologies

Programming Languages

BashC#JSONJavaJavaScriptKotlinMarkdownPythonRustShell

Technical Skills

API DevelopmentAPI developmentAPI integrationAssertJAsynchronous ProgrammingBackend DevelopmentBash ScriptingBuild System ConfigurationBuild automationC#C# developmentCI/CDClient-Server ArchitectureCode QualityConfiguration Management

Repositories Contributed To

2 repos

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

iggy-rs/iggy

Feb 2025 Feb 2026
6 Months active

Languages Used

RustKotlinC#JavaJavaScriptPythonShellYAML

Technical Skills

Backend DevelopmentError HandlingLoggingSystem AdministrationBuild System ConfigurationAPI Development

apache/iggy

Feb 2026 Mar 2026
2 Months active

Languages Used

BashJavaScriptTypeScriptYAMLJavaRustSvelte

Technical Skills

CI/CDHomebrewNode.jsSveltedependency managementfront end development