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Alexandru Marc

PROFILE

Alexandru Marc

Amar C. focused on stabilizing and maintaining large browser codebases, primarily working in the mozilla/gecko-dev and servo/stylo repositories. Over four months, Amar systematically reverted unstable features and experimental changes, such as math-shift: compact and platform-level telemetry updates, to restore build and test reliability. Using C++, Rust, and CSS, Amar addressed over seventy bugs by rolling back problematic commits, updating test configurations, and resolving build bustages across Linux, Windows, and macOS. This work improved CI feedback loops, reduced flakiness, and ensured a stable baseline for future development, demonstrating a deep understanding of cross-platform build systems and automated testing.

Overall Statistics

Feature vs Bugs

0%Features

Repository Contributions

101Total
Bugs
72
Commits
101
Features
0
Lines of code
476,765
Activity Months4

Work History

August 2025

1 Commits

Aug 1, 2025

In August 2025, stabilized servo/stylo by reverting the experimental math-shift: compact feature due to non-unified build breakages. The revert updates the MathDepth animation type and removes the math-shift property definition, restoring stable builds across configurations. This work reduces build failures and enables safer, faster iterations for the codebase.

July 2025

16 Commits

Jul 1, 2025

July 2025 (Month: 2025-07) focused on stabilizing cross-platform test reliability in mozilla/gecko-dev and restoring CI health by removing destabilizing experiments and telemetry/UI changes. Delivered targeted test configuration improvements across Linux, Windows, and macOS, improved reporting of test outcomes, and updated expectations. Simultaneously rolled back unstable platform experiments and telemetry/UI changes that caused build/test flakiness, reducing false negatives and speeding up validation cycles. Result: a more robust baseline for test suites and a clearer path to stable releases.

June 2025

82 Commits

Jun 1, 2025

June 2025 monthly summary focusing on stability, lint/remediation, and cross-repo coordination across Gecko and Stylo. Delivered a targeted lint fix, stabilized test suites by executing a broad rollback of unstable changes, and maintained build health via a controlled ICU4X downgrade in Stylo. Demonstrated strong cross-team collaboration, rapid risk mitigation, and initiative in improving CI reliability and release readiness.

May 2025

2 Commits

May 1, 2025

May 2025 (servo/stylo) focused on stabilizing the codebase by reverting unstable changes in image/color processing and view-transition-class handling. No new features delivered this month; the primary work was a targeted rollback to restore stability, prevent build bustages, and avoid WPT failures in the test suite. This ensured release readiness and preserved user experience while maintaining a clean baseline for future iterations. Key rollback details: - Reverted unstable image/color processing changes to remove build bustages (commit 2d515035b1524e1a5956194a3eb8bc2418be7eac) - Reverted view-transition-class parsing/serialization changes to address WPT failures (commit 5f95bad414fcba295b7422c31e035e301645d833) - Outcome: stabilized builds, reduced flaky tests, and preserved stability for upcoming releases.

Activity

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Quality Metrics

Correctness80.8%
Maintainability81.4%
Architecture73.4%
Performance71.2%
AI Usage20.4%

Skills & Technologies

Programming Languages

CC++CSSFTLGradleHTMLIDLINIIniJSX

Technical Skills

AV1Accessibility TestingAndroid DevelopmentBrowser AutomationBrowser Developer ToolsBrowser DevelopmentBrowser Extension DevelopmentBrowser TestingBug FixingBug TriageBuild ConfigurationBuild SystemBuild System ConfigurationBuild System IntegrationBuild Systems

Repositories Contributed To

2 repos

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

mozilla/gecko-dev

Jun 2025 Jul 2025
2 Months active

Languages Used

CC++CSSFTLGradleHTMLIDLINI

Technical Skills

AV1Accessibility TestingAndroid DevelopmentBrowser AutomationBrowser Developer ToolsBrowser Development

servo/stylo

May 2025 Aug 2025
3 Months active

Languages Used

PythonRustTOML

Technical Skills

Build SystemCSSCSS ParsingReverting ChangesRustWeb Development

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