quarkusio/quarkus
Dec 2025 – Mar 2026
4 Months active
Languages Used
JavaYAML
Technical Skills
API DevelopmentBackend DevelopmentCode OptimizationGraalVMJUnitJava
Foivos Zakkak
PROFILE
Foivos Zakkak
Over four months, Zakkak contributed to the quarkusio/quarkus repository by developing and optimizing backend features focused on Java runtime compatibility, GraalVM integration, and reflection-based registration. He enhanced the ReflectiveHierarchyStep to improve runtime registration coverage and performance, replacing deep recursion with an iterative approach and ensuring compatibility with Kotlin. Zakkak also introduced new RESTful API endpoints and refined security-related reflection handling, leveraging Java, Kotlin, and Quarkus. His work included updating CI/CD pipelines and deprecating obsolete components, resulting in faster startup times, improved build stability, and more robust native-image support. The engineering demonstrated thoughtful refactoring and comprehensive test coverage.
Overall Statistics
Feature vs Bugs
88%Features
Repository Contributions
17Total
Bugs
1
Commits
17
Features
7
Lines of code
566
Activity Months4
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Work History
March 2026
2 Commits • 1 Features
Mar 1, 2026Monthly work summary for 2026-03 focusing on performance optimizations in ReflectiveHierarchyStep for quarkus. Delivered a feature-level optimization by skipping already processed types and replacing deep recursion with a queue-based iterative approach, reducing startup time and improving build stability. Kotlin-specific adjustments were added to avoid deep recursion. Commits include d797723b0412a309c8149db6d0c67e9a29f519e0 (Don't traverse already processed types…) and 19135cdd701363fbbfacd1e7c786721356e0559a (Avoid deep recursion in ReflectiveHierarchyStep for kotlin classes). Fixes: #52880. Result: dev startup time in quarkus:dev dropped from ~13s to ~3s, with fewer recursion-related risks and overall more stable startup cycles.
2 Commits • 1 Features
Mar 1, 2026Monthly work summary for 2026-03 focusing on performance optimizations in ReflectiveHierarchyStep for quarkus. Delivered a feature-level optimization by skipping already processed types and replacing deep recursion with a queue-based iterative approach, reducing startup time and improving build stability. Kotlin-specific adjustments were added to avoid deep recursion. Commits include d797723b0412a309c8149db6d0c67e9a29f519e0 (Don't traverse already processed types…) and 19135cdd701363fbbfacd1e7c786721356e0559a (Avoid deep recursion in ReflectiveHierarchyStep for kotlin classes). Fixes: #52880. Result: dev startup time in quarkus:dev dropped from ~13s to ~3s, with fewer recursion-related risks and overall more stable startup cycles.
March 2026
February 2026
3 Commits • 2 Features
Feb 1, 2026February 2026 monthly summary for quarkusio/quarkus. Key work included three high-impact items: (1) Reflection-based registration enhancement to cover subclasses and interface implementations by treating field types and getter return types as explicitly marked for hierarchical reflection, enabling more complete runtime registration. (2) New API endpoint to retrieve a record instance, with tests validating the functionality, improving runtime accessibility of record data. (3) GraalVM initialization timing fix by moving build-time initialization to duringSetup to ensure proper initialization order and prevent premature runtime initialization. These efforts enhance runtime correctness, API ergonomics, and GraalVM compatibility, delivering measurable business value through more robust reflection coverage, safer initialization, and faster validation cycles.
February 2026
3 Commits • 2 Features
Feb 1, 2026February 2026 monthly summary for quarkusio/quarkus. Key work included three high-impact items: (1) Reflection-based registration enhancement to cover subclasses and interface implementations by treating field types and getter return types as explicitly marked for hierarchical reflection, enabling more complete runtime registration. (2) New API endpoint to retrieve a record instance, with tests validating the functionality, improving runtime accessibility of record data. (3) GraalVM initialization timing fix by moving build-time initialization to duringSetup to ensure proper initialization order and prevent premature runtime initialization. These efforts enhance runtime correctness, API ergonomics, and GraalVM compatibility, delivering measurable business value through more robust reflection coverage, safer initialization, and faster validation cycles.
January 2026
4 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary focused on GraalVM native image integration for quarkusio/quarkus. Delivered improvements to native-image reflection handling, updated GraalVM/Mandrel versions, and enhanced CI configuration. Deprecated obsolete JniBuildItem and strengthened tooling alignment with GraalVM 19.3.1+. Expanded test coverage to ensure manual class registration (e.g., Carol) is respected by the native-image agent, improving reliability of native builds and maintainability.
4 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary focused on GraalVM native image integration for quarkusio/quarkus. Delivered improvements to native-image reflection handling, updated GraalVM/Mandrel versions, and enhanced CI configuration. Deprecated obsolete JniBuildItem and strengthened tooling alignment with GraalVM 19.3.1+. Expanded test coverage to ensure manual class registration (e.g., Carol) is respected by the native-image agent, improving reliability of native builds and maintainability.
January 2026
December 2025
8 Commits • 3 Features
Dec 1, 2025Concise monthly summary for 2025-12 focusing on business value and technical achievements for quarkusio/quarkus. Highlights key features delivered, major fixes, impact, and technologies demonstrated.
December 2025
8 Commits • 3 Features
Dec 1, 2025Concise monthly summary for 2025-12 focusing on business value and technical achievements for quarkusio/quarkus. Highlights key features delivered, major fixes, impact, and technologies demonstrated.
Activity
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Quality Metrics
Correctness98.8%
Maintainability95.4%
Architecture96.6%
Performance97.8%
AI Usage20.0%
Skills & Technologies
Programming Languages
JavaYAML
Technical Skills
API DevelopmentBackend DevelopmentCI/CDCode OptimizationDevOpsFramework DevelopmentGraalVMIntegration TestingJUnitJavaKotlinQuarkusRESTful API developmentReflectionSecurity
Repositories Contributed To
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