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Tomasz Czajęcki

PROFILE

Tomasz Czajęcki

Over seven months, this developer contributed to the expo and eas-build repositories by delivering features and documentation that improved developer experience, onboarding, and workflow reliability. They built and enhanced CLI commands in expo/eas-cli using TypeScript and Node.js, enabling custom Expo Go app deployments to TestFlight and refining credential prompt visibility for better security. Their work in expo/eas-build included upgrading schema validation with Zod v4, maintaining type safety and clearer error feedback. Across multiple repositories, they focused on documentation clarity, onboarding flow, and front-end improvements using React and GraphQL, consistently aligning technical changes with usability and maintainability goals.

Overall Statistics

Feature vs Bugs

88%Features

Repository Contributions

10Total
Bugs
1
Commits
10
Features
7
Lines of code
1,188
Activity Months7

Work History

February 2026

4 Commits • 1 Features

Feb 1, 2026

February 2026 monthly summary for expo/eas-cli focusing on feature delivery, bug fixes, and business impact. Highlights include the introduction of a new Expo Go CLI command to create and deploy a custom Expo Go app to TestFlight, UX improvements with time estimates in long-running operations, and a security/UX fix ensuring credential prompts are visible when auto-accepting credential reuse is disabled. The work is mapped to specific commits for traceability and impact on developer productivity and deployment velocity.

October 2025

1 Commits • 1 Features

Oct 1, 2025

October 2025 monthly summary for expo/expo: Delivered a new Expo App Awards banner on the Documentation homepage. The banner is conditionally displayed, includes a dismiss button, and provides a link to submit an app, with the intent to raise awareness and participation in the Expo App Awards. Implemented in the docs repository via a single commit and associated PR.

September 2025

1 Commits • 1 Features

Sep 1, 2025

September 2025 monthly summary for expo/eas-build: Focused upgrade of the validation layer to Zod v4 across eas-build, updating schemas and error messages while preserving type safety and data validation. Completed under a single, traceable commit: 374c90aaa078f78e58756521903c88b23b30e679 ([eas-build-job] upgrade to Zod 4 (#584)). Impact: more reliable build validation, clearer error feedback for developers and users, and a solid foundation for future validation enhancements. No major bugs fixed this month; main value lies in improved reliability and developer experience.

May 2025

1 Commits • 1 Features

May 1, 2025

May 2025 monthly summary for mrousavy/expo: Focused on onboarding/documentation improvements to streamline developer setup while new features are developed. Delivered Getting Started Documentation Cleanup which updates onboarding flow by removing references to expo.new, removing the Earth02Icon import, and updating introductory text and tutorial follow-ups to point users to alternative setup methods. These changes were implemented to improve onboarding efficiency and reduce friction for new contributors. No major bug fixes were completed this month; maintenance efforts were aligned with documentation quality and developer experience.

March 2025

1 Commits • 1 Features

Mar 1, 2025

March 2025 monthly summary for the mrousavy/expo repository focused on documenting the fingerprint pre-packaged job in EAS workflows to support CNG managed workflows. Delivered clear, actionable documentation detailing purpose, usage, and output properties to enable faster integration and reduce onboarding time for enterprise workflows.

February 2025

1 Commits • 1 Features

Feb 1, 2025

February 2025 – mrousavy/expo: Delivered documentation for EAS workflows defaults configuration to improve build environment clarity and usability. The update covers defaults.run.working_directory and defaults.tools, with practical examples on specifying default versions for tools such as Node.js, Yarn, and Fastlane within the workflow syntax. This reduces configuration ambiguity and accelerates onboarding for teams configuring EAS builds.

December 2024

1 Commits • 1 Features

Dec 1, 2024

2024-12 monthly summary for mrousavy/expo: Delivered the Audit Logs Feature for the EAS Dashboard, including a dedicated audit logs page, integration with app navigation, and updated documentation to explain tracking of account activities and security events. No major bugs fixed this month. The work enhances security visibility, improves compliance readiness, and strengthens user trust by providing centralized auditing and clear user guidance. Demonstrated technologies and skills include front-end UI integration, navigation wiring, and documentation practices, evidenced by the commit updating docs for the new EAS dashboard security features.

Activity

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Quality Metrics

Correctness98.0%
Maintainability94.0%
Architecture96.0%
Performance92.0%
AI Usage24.0%

Skills & Technologies

Programming Languages

JavaScriptMarkdownTypeScriptYAMLgraphqltypescript

Technical Skills

Build ToolsCI/CDCLI DevelopmentCLI developmentContent ManagementDependency ManagementDocumentationFront End DevelopmentGraphQLNode.jsReactSchema ValidationTechnical WritingTypeScriptUser Experience Design

Repositories Contributed To

4 repos

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

mrousavy/expo

Dec 2024 May 2025
4 Months active

Languages Used

JavaScriptMarkdownYAML

Technical Skills

DocumentationTechnical WritingCI/CDContent Management

expo/eas-cli

Feb 2026 Feb 2026
1 Month active

Languages Used

TypeScript

Technical Skills

CLI DevelopmentCLI developmentGraphQLNode.jsTypeScriptUser Experience Design

expo/eas-build

Sep 2025 Sep 2025
1 Month active

Languages Used

graphqltypescript

Technical Skills

Build ToolsDependency ManagementSchema ValidationTypeScript

expo/expo

Oct 2025 Oct 2025
1 Month active

Languages Used

JavaScriptTypeScript

Technical Skills

Front End DevelopmentReactTypeScript