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Karol Kokoszka

PROFILE

Karol Kokoszka

Karol developed robust cross-chain testing and benchmarking infrastructure across the Polkadot ecosystem, focusing on repositories such as paritytech/polkadot-sdk and polkadot-fellows/runtimes. He implemented end-to-end test frameworks and asset transfer benchmarking using Rust and TypeScript, enabling automated validation and performance measurement for parachain and XCM scenarios. His work included governance upgrade test coverage for Westend, integration of root-origin execution for AssetHub, and CI/CD workflow improvements to enhance reliability. By refactoring integration tests and updating runtime components, Karol improved test resilience and reduced migration risk, demonstrating depth in system programming, blockchain development, and continuous integration for Substrate-based networks.

Overall Statistics

Feature vs Bugs

89%Features

Repository Contributions

12Total
Bugs
1
Commits
12
Features
8
Lines of code
6,520
Activity Months5

Work History

September 2025

1 Commits • 1 Features

Sep 1, 2025

Month 2025-09: Delivered a critical runtime upgrade and enhanced test resilience for Asset Hub migrations in polkadot-fellows/runtimes.

June 2025

2 Commits • 2 Features

Jun 1, 2025

June 2025: Delivered governance upgrade testing coverage for Westend and introduced asset transfer benchmarking and XCM test scenarios in paritytech/polkadot-sdk. Strengthened cross-chain test coverage and updated weight information to reflect coretime chain performance. These efforts reduce upgrade risk, improve test reliability, and provide actionable performance data for future optimization.

May 2025

7 Commits • 3 Features

May 1, 2025

May 2025: Strengthened cross-chain asset transfer capabilities and CI reliability across three repositories. Delivered XCM testing and asset transfer benchmarking enhancements in paritytech/polkadot-sdk (improved assertion on missing events, new set_up_complex_asset_transfer for benchmarking, dry-run fee estimation, and parametrization of extrinsics) with synchronized XCM test utilities. Coordinated integration-test refactors in polkadot-fellows/runtimes to exercise transfer_assets and limited_teleport_assets across parachains and updated benchmark weights for transfer_assets. Launched multi-network CI snapshots for Westend and Polkadot in paritytech/ahm-dryrun, with CI workflow consolidation and build-scripts updates to support both networks. Fixed CI reliability by removing an init flag for submodules and addressing dubious ownership in workflows. These efforts improved benchmarking fidelity, reduced CI flakiness, and accelerated readiness for cross-chain feature releases.

April 2025

1 Commits • 1 Features

Apr 1, 2025

April 2025: Delivered foundational cross-chain origin handling in paritytech/polkadot-sdk, focusing on AssetHub cross-chain actions. Implemented LocationAsSuperuser converter in xcm-builder to treat specific XCM Locations as the root origin on the local chain, enabling root-level extrinsics on other chains. This work strengthens cross-chain interoperability and reduces friction for asset mobility across ecosystems.

March 2025

1 Commits • 1 Features

Mar 1, 2025

March 2025 monthly summary for open-web3-stack/polkadot-ecosystem-tests. Focused on delivering a robust end-to-end testing framework for the Collectives parachain, laying the groundwork for automated CI and cross-chain validation. No major bug fixes reported this period.

Activity

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Quality Metrics

Correctness88.2%
Maintainability86.8%
Architecture82.6%
Performance77.4%
AI Usage20.0%

Skills & Technologies

Programming Languages

BashJavaScriptMakefileRustShellTOMLTypeScriptYAML

Technical Skills

BenchmarkingBlockchain DevelopmentBuild SystemsCI/CDDockerEnd-to-end testingGitGitHub ActionsGovernanceIntegration TestingMacrosParachainParachain DevelopmentPolkadotRuntime Development

Repositories Contributed To

4 repos

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

paritytech/polkadot-sdk

Apr 2025 Jun 2025
3 Months active

Languages Used

RustTOML

Technical Skills

Blockchain DevelopmentRustSystem ProgrammingXCMBenchmarkingIntegration Testing

paritytech/ahm-dryrun

May 2025 May 2025
1 Month active

Languages Used

BashMakefileShellYAML

Technical Skills

Build SystemsCI/CDDockerGitGitHub ActionsRust

polkadot-fellows/runtimes

May 2025 Sep 2025
2 Months active

Languages Used

Rust

Technical Skills

BenchmarkingIntegration TestingParachain DevelopmentRustXCMSubstrate

open-web3-stack/polkadot-ecosystem-tests

Mar 2025 Mar 2025
1 Month active

Languages Used

JavaScriptTypeScript

Technical Skills

End-to-end testingParachainPolkadotTypeScriptXCM

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