google/j2objc
Mar 2025 – Jan 2026
4 Months active
Languages Used
Java
Technical Skills
Android EmulationCode GenerationCompiler DevelopmentJSONJavaObjective-C Interoperability
Michał Pociecha-Łoś
PROFILE
Michał Pociecha-łoś
Worked on the google/j2objc repository over four months, focusing on cross-language compatibility, memory management, and type safety. Addressed five critical bugs by refining Objective-C nullability handling, ensuring JSONArray methods never return null, and aligning annotation retention policies for better interoperability between Java and Objective-C. Improved memory stability in TreeMap by introducing @RetainedWith and refactoring parent-child management, reducing leaks in Java Collections. Developed targeted regression tests for WeakReference crashes, enhancing reliability in memory-sensitive paths. Leveraged skills in Java, annotation processing, and unit testing to deliver robust solutions that strengthened code generation, compiler behavior, and cross-platform integration across the toolchain.
Overall Statistics
Feature vs Bugs
0%Features
Repository Contributions
5Total
Bugs
5
Commits
5
Features
0
Lines of code
136
Activity Months4
Your Network
5014 peopleSame Organization
@google.com4995
Benedict OdaiMember
Craig IngramMember
KayyuriMember
Scott SuarezMember
Agent2Agent (A2A) BotMember
Andreas AbelMember
Aadi KapurMember
Aadish GoelMember
Aahil MehtaMember
Work History
January 2026
1 Commits
Jan 1, 2026January 2026 monthly summary for google/j2objc focused on ensuring cross-language compatibility and build reliability. Implemented a targeted bug fix to align annotation retention policy across J2CL and ObjectiveCName, enabling annotation access from compiled class files and reducing downstream integration issues.
1 Commits
Jan 1, 2026January 2026 monthly summary for google/j2objc focused on ensuring cross-language compatibility and build reliability. Implemented a targeted bug fix to align annotation retention policy across J2CL and ObjectiveCName, enabling annotation access from compiled class files and reducing downstream integration issues.
January 2026
August 2025
1 Commits
Aug 1, 2025August 2025 monthly summary focusing on stabilizing memory usage in TreeMap-intensive paths for google/j2objc. Delivered a memory-leak fix for TreeMap's descending views by introducing the @RetainedWith annotation and refactoring internal parent-child management, improving memory stability and reliability across platforms.
August 2025
1 Commits
Aug 1, 2025August 2025 monthly summary focusing on stabilizing memory usage in TreeMap-intensive paths for google/j2objc. Delivered a memory-leak fix for TreeMap's descending views by introducing the @RetainedWith annotation and refactoring internal parent-child management, improving memory stability and reliability across platforms.
July 2025
1 Commits
Jul 1, 2025July 2025 monthly summary for google/j2objc focusing on regression testing and crash analysis. Added reproduction tests for WeakReference creation with String objects; these tests expose a crash pathway and align with bug b/433938552. Tests are currently ignored to avoid noise until the underlying issue is resolved. This work improves reliability by enabling faster diagnosis and future fix, reduces production risk, and strengthens the test suite for memory handling across language bridging.
1 Commits
Jul 1, 2025July 2025 monthly summary for google/j2objc focusing on regression testing and crash analysis. Added reproduction tests for WeakReference creation with String objects; these tests expose a crash pathway and align with bug b/433938552. Tests are currently ignored to avoid noise until the underlying issue is resolved. This work improves reliability by enabling faster diagnosis and future fix, reduces production risk, and strengthens the test suite for memory handling across language bridging.
July 2025
March 2025
2 Commits
Mar 1, 2025In March 2025, two critical bug fixes were delivered in the google/j2objc repo, focusing on nullability handling and non-null JSON string generation. These changes enhance Objective-C interop safety, type-safety, and consistency with JSONObject behavior, reducing runtime nullability issues for iOS consumers. Key commits: 3cc0c7ba07d8900810c6f8c6fb03cec07596a1f8; 020de66351f2d9c6555dc8a6cd129f8e2533c71d.
March 2025
2 Commits
Mar 1, 2025In March 2025, two critical bug fixes were delivered in the google/j2objc repo, focusing on nullability handling and non-null JSON string generation. These changes enhance Objective-C interop safety, type-safety, and consistency with JSONObject behavior, reducing runtime nullability issues for iOS consumers. Key commits: 3cc0c7ba07d8900810c6f8c6fb03cec07596a1f8; 020de66351f2d9c6555dc8a6cd129f8e2533c71d.
Activity
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Quality Metrics
Correctness94.0%
Maintainability92.0%
Architecture88.0%
Performance88.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
Java
Technical Skills
Android EmulationAnnotation ProcessingCode GenerationCompiler DevelopmentJSONJavaJava CollectionsMemory ManagementObject-C InteroperabilityObjective-C InteroperabilityUnit Testing
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