mozilla/gecko-dev
Jun 2025 – Jul 2025
2 Months active
Languages Used
GradleJavaKotlin
Technical Skills
API IntegrationAndroid DevelopmentBottomSheetDialogFragmentCode RefactoringComposeCoroutines
Marcin Koziński
PROFILE
Marcin Koziński
Worked on the mozilla/gecko-dev repository to deliver a robust in-app review prompt system for Fenix Android, focusing on modularity and maintainability. Built end-to-end enhancements for app launch telemetry and Play Store review flows, centralizing launch tracking and extracting review logic into dedicated controllers. Leveraged Kotlin, Jetpack Compose, and Redux-like state management to implement custom review prompts with bottom sheet UI, comprehensive eligibility logic, and unit tests. Emphasized modular controller design and middleware patterns to ensure safe, predictable prompt behavior, improving user engagement and feedback governance while establishing a solid foundation for future feature iteration and code audits.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
8Total
Bugs
0
Commits
8
Features
4
Lines of code
1,372
Activity Months2
Your Network
901 peopleSame Organization
@mozilla.com401
Shared Repositories
500
Work History
July 2025
2 Commits • 1 Features
Jul 1, 2025Month: 2025-07 | This month focused on delivering a robust in-app review prompt system for Fenix Android within mozilla/gecko-dev, establishing a maintainable foundation and targeting user engagement improvements. Key outcomes include the creation of foundation components (state, actions, middleware) for the prompt flow, plus comprehensive unit tests that cover eligibility logic (app launches, default browser status, last shown) and state updates. Major bug work targeted the Bug 1966873 family, adding AppStore state, actions, and middleware for showing the review prompt, with accompanying tests for the reducer and middleware to ensure safe, predictable behavior across launches and app states. Overall impact: provides a safer, more controllable prompt experience, increasing the likelihood of user reviews while reducing the risk of prompts at inappropriate times. The work enhances maintainability through modular state-management patterns and solid test coverage, enabling easier future changes and audits. Technologies/skills demonstrated: state/actions/middleware architectural pattern, Redux-like approach to mobile feature flows, comprehensive unit testing (coverage for eligibility logic and state updates), and Android integration considerations for cross-platform UX.
2 Commits • 1 Features
Jul 1, 2025Month: 2025-07 | This month focused on delivering a robust in-app review prompt system for Fenix Android within mozilla/gecko-dev, establishing a maintainable foundation and targeting user engagement improvements. Key outcomes include the creation of foundation components (state, actions, middleware) for the prompt flow, plus comprehensive unit tests that cover eligibility logic (app launches, default browser status, last shown) and state updates. Major bug work targeted the Bug 1966873 family, adding AppStore state, actions, and middleware for showing the review prompt, with accompanying tests for the reducer and middleware to ensure safe, predictable behavior across launches and app states. Overall impact: provides a safer, more controllable prompt experience, increasing the likelihood of user reviews while reducing the risk of prompts at inappropriate times. The work enhances maintainability through modular state-management patterns and solid test coverage, enabling easier future changes and audits. Technologies/skills demonstrated: state/actions/middleware architectural pattern, Redux-like approach to mobile feature flows, comprehensive unit testing (coverage for eligibility logic and state updates), and Android integration considerations for cross-platform UX.
July 2025
June 2025
6 Commits • 3 Features
Jun 1, 2025June 2025 performance summary for mozilla/gecko-dev. Delivered end-to-end enhancements across app launch telemetry, Play Store In-App Review flow, and custom review prompts. These efforts improve reliability of startup analytics, code modularity, and user engagement with review prompts, laying a foundation for faster iteration and better governance of user feedback. Technologies and practices demonstrated include Kotlin, Android MVVM architecture, modular controller design, and Jetpack Compose-based UI for prompts.
June 2025
6 Commits • 3 Features
Jun 1, 2025June 2025 performance summary for mozilla/gecko-dev. Delivered end-to-end enhancements across app launch telemetry, Play Store In-App Review flow, and custom review prompts. These efforts improve reliability of startup analytics, code modularity, and user engagement with review prompts, laying a foundation for faster iteration and better governance of user feedback. Technologies and practices demonstrated include Kotlin, Android MVVM architecture, modular controller design, and Jetpack Compose-based UI for prompts.
Activity
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Quality Metrics
Correctness97.6%
Maintainability96.2%
Architecture96.2%
Performance87.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
GradleJavaKotlin
Technical Skills
API IntegrationAndroid DevelopmentBottomSheetDialogFragmentCode RefactoringComposeCoroutinesJetpack ComposeMobile DevelopmentNavigation ComponentRedux (or similar patterns)Redux MiddlewareRefactoringState ManagementUI DevelopmentUnit Testing
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline