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Leszek Stachowski

PROFILE

Leszek Stachowski

Over a three-month period, contributed to the celo-org/celo-mondo and developer-tooling repositories by delivering seven new features focused on analytics, developer tooling, and user experience. Built an analytics tracking system with server-side validation and end-to-end tests using TypeScript, PostgreSQL, and Playwright, enabling data-driven insights across navigation, voting, and staking components. Enhanced CLI workflows in developer-tooling by migrating contract interactions to viem, refactoring for modularity, and improving release tagging logic for npm packages. Improved staking UX by displaying validator group capacity and streamlined CI pipelines with Docker and Drizzle ORM, supporting reliable deployments and maintainable, testable codebases without introducing new bugs.

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