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alex28sh

PROFILE

Alex28sh

Aleksandr Shefer contributed to the JetBrains/kotlin and google/kotlin repositories by advancing Kotlin’s WebAssembly (Wasm) backend and improving JavaScript interop. Over three months, he developed features such as Wasm-specific export safety, nativeInvoke annotation support, and br_table optimizations for Char and Short types. His work involved code analysis, annotation processing, and compiler development in both Java and Kotlin, focusing on artifact hygiene and cross-language interoperability. Aleksandr refactored common checker logic for maintainability, expanded test coverage for Wasm interop scenarios, and introduced deprecation paths for evolving APIs, demonstrating a deep, systematic approach to stabilizing and extending Kotlin’s Wasm capabilities.

Overall Statistics

Feature vs Bugs

86%Features

Repository Contributions

19Total
Bugs
1
Commits
19
Features
6
Lines of code
974
Activity Months3

Work History

October 2025

5 Commits • 1 Features

Oct 1, 2025

October 2025 monthly summary focused on advancing Kotlin's Wasm JS interop and stabilizing the nativeInvoke annotation lifecycle. Key refactor moved nativeInvoke to a reusable module, introduced a deprecation path while the stable design is developed, and expanded end-to-end test coverage to validate interop behavior (including the KT-79937 case). Test environment adjustments ensured compilation with opt-in usage suppression where needed, and CI/test suites were aligned for reliability.

September 2025

5 Commits • 3 Features

Sep 1, 2025

September 2025 performance summary: Delivered cross-target Wasm quality improvements and backend optimizations across JetBrains/kotlin and google/kotlin. Key features and refactors enhanced maintainability and correctness, while targeted tests improved Wasm interoperation reliability. The work reduces interop-related issues, streamlines Wasm code generation, and strengthens compiler infrastructure for Wasm targets.

August 2025

9 Commits • 2 Features

Aug 1, 2025

August 2025 monthly summary: Focused on stabilizing Kotlin/Wasm artifacts and expanding interop capabilities across Google Kotlin and JetBrains Kotlin repos. Delivered Wasm-specific export safety and improved artifact hygiene, enabling safer cross-language interop and cleaner build outputs.

Activity

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Quality Metrics

Correctness93.2%
Maintainability93.2%
Architecture90.6%
Performance86.8%
AI Usage20.0%

Skills & Technologies

Programming Languages

JavaKotlin

Technical Skills

Annotation ProcessingCode AnalysisCode GenerationCode RefactoringCompiler DevelopmentCompiler TestingError HandlingInteroperabilityJS InteropJavaJavaScript InteroperabilityKotlinKotlin/JSKotlin/WasmLanguage Design

Repositories Contributed To

2 repos

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

JetBrains/kotlin

Aug 2025 Oct 2025
3 Months active

Languages Used

JavaKotlin

Technical Skills

Annotation ProcessingCode GenerationCompiler DevelopmentCompiler TestingJS InteropKotlin

google/kotlin

Aug 2025 Sep 2025
2 Months active

Languages Used

JavaKotlin

Technical Skills

Code AnalysisCompiler DevelopmentCompiler TestingError HandlingKotlin/JSKotlin/Wasm