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Leszek Stachowski

PROFILE

Leszek Stachowski

Leszek Stachowski delivered robust feature development across the celo-org/celo-mondo and developer-tooling repositories, focusing on analytics, CLI tooling, and release workflows. He implemented an analytics tracking system with server-side validation and end-to-end tests using TypeScript and PostgreSQL, enabling data-driven insights and improved user experience. In developer-tooling, Leszek migrated contract interaction logic to viem, refactored CLI modules for modularity, and enhanced npm release tagging with regex-based validation. His work emphasized maintainability, test coverage, and deployment reliability, leveraging JavaScript, Node.js, and CI/CD pipelines. Across three months, Leszek’s contributions demonstrated depth in backend, frontend, and developer tooling engineering.

Overall Statistics

Feature vs Bugs

100%Features

Repository Contributions

9Total
Bugs
0
Commits
9
Features
7
Lines of code
6,466
Activity Months3

Work History

February 2026

6 Commits • 4 Features

Feb 1, 2026

February 2026: Delivered key features and reliability improvements for celo-org/celo-mondo, focused on analytics, discovery, CI reliability, and staking UX. The work enhances data-driven decision making, user experience, and deployment confidence, positioning the product for growth and better user insight.

April 2025

1 Commits • 1 Features

Apr 1, 2025

April 2025: Delivered a pivotal migration of the CheckBuilder to viem in celocli, introducing the epoch:status command and laying the groundwork for broader viem adoption. The work improves contract interactions, reduces dependency on ContractKit/web3, and enhances testability and maintainability of the developer-tooling CLI. No major bugs identified this month; the focus was architectural evolution with clear business value in reliability and faster delivery of future features.

March 2025

2 Commits • 2 Features

Mar 1, 2025

Monthly summary for 2025-03 focused on robust versioning and cleaner developer UX across the celo-monorepo and developer-tooling repositories. Delivered enhancements to release tagging accuracy and streamlined CLI output, driving faster, more reliable npm publishing and improved developer productivity.

Activity

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Quality Metrics

Correctness88.8%
Maintainability83.4%
Architecture83.4%
Performance75.6%
AI Usage31.0%

Skills & Technologies

Programming Languages

JavaScriptSQLShellTypeScriptYAMLtsx

Technical Skills

API DevelopmentAnalytics ImplementationBackend DevelopmentCI/CDCI/CD ConfigurationCLI DevelopmentComponent DevelopmentData ValidationDatabase ManagementDockerDrizzle ORMEVMEnd-to-End TestingFrontend DevelopmentJavaScript

Repositories Contributed To

3 repos

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

celo-org/celo-mondo

Feb 2026 Feb 2026
1 Month active

Languages Used

JavaScriptSQLShellTypeScriptYAMLtsx

Technical Skills

API DevelopmentAnalytics ImplementationBackend DevelopmentCI/CDCI/CD ConfigurationComponent Development

celo-org/developer-tooling

Mar 2025 Apr 2025
2 Months active

Languages Used

JavaScriptTypeScript

Technical Skills

CLI DevelopmentNode.jsTestingEVMRefactoringSmart Contracts

celo-org/celo-monorepo

Mar 2025 Mar 2025
1 Month active

Languages Used

JavaScriptTypeScript

Technical Skills

Node.jsScriptingTestingVersion Control

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