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Khanh Duy

PROFILE

Khanh Duy

Worked on backend systems for stable matching problems, focusing on the suyttthideptrai/SS1_2023_StableMatchingSolver_Backend and FitHanuSpecialSubject/GA-Application-Java repositories. Delivered features that strengthened input validation, improved error handling, and enhanced data integrity using Java and Spring Boot. Integrated custom validation logic for data transfer objects, ensuring syntactic correctness and reducing runtime errors. Expanded stable matching capabilities by designing APIs and interfaces compatible with the MOEA Framework, supporting various matching scenarios. Contributed comprehensive technical documentation in Markdown, clarifying API usage and onboarding processes. Prioritized maintainability and reliability, enabling faster feature development and smoother cross-team collaboration through clear code structure and documentation.

Overall Statistics

Feature vs Bugs

100%Features

Repository Contributions

15Total
Bugs
0
Commits
15
Features
6
Lines of code
1,308
Activity Months4

Your Network

10 people

Work History

April 2025

6 Commits • 2 Features

Apr 1, 2025

April 2025 (2025-04) monthly summary for FitHanuSpecialSubject/GA-Application-Java. The work this month focused on expanding stable matching capabilities and strengthening documentation to improve reuse, onboarding, and cross-team collaboration. There were no major bugs fixed this period; the emphasis was on feature delivery and clarity of guidance for future work. Overall, the month delivered strong business value by enabling flexible matching scenarios and providing comprehensive, actionable documentation to accelerate development and integration efforts across teams.

March 2025

2 Commits • 1 Features

Mar 1, 2025

March 2025 performance summary for FitHanuSpecialSubject/GA-Application-Java: Focused on documentation quality and repo structure for Stable Matching. Delivered comprehensive documentation for implementing new MatchingProblem variants, adding routes in HomeController, and updating DTO mappers, with code examples. Resolved naming inconsistencies by aligning the docs directory and files to the original project format. These efforts improve onboarding, accelerate downstream feature work, and reduce maintenance overhead.

November 2024

6 Commits • 2 Features

Nov 1, 2024

November 2024 Monthly Summary for suyttthideptrai/SS1_2023_StableMatchingSolver_Backend. Focused on delivering robust stability validation, improved error handling, and codebase cleanliness to enhance reliability and maintainability of the Stable Matching solver. Key features delivered: - Stable Matching Validation Improvements and Robustness: Strengthened input validation and evaluation logic with per-function checks, new validation constants, and clearer error messaging. Updates included NewStableMatchingDTO enhancements and related DTO changes to support clearer FE responses. Ensured matrix/array dimension integrity (rows equal number of individuals) and alignment with numberOfIndividuals. Backend now returns Map-based responses to FE for consistency and easier consumption. - Codebase Cleanup and Reversion of Non-Essential Modifications: Reverted unnecessary changes, removed an extra blank line and a logger statement, and cleaned up the main application class and global exception handler to improve maintainability. Major bugs fixed: - Resolved edge-case validation issues by tightening array dimension checks and error propagation, reducing frontend defects and misleading error messages. - Removed legacy/unused code paths (e.g., errorMapper.java) to reduce noise and potential confusion. Overall impact and accomplishments: - Increased robustness and reliability of the Stable Matching backend; improved data integrity and clearer frontend feedback; reduced defect risk from malformed inputs; and improved maintainability to support future feature work. Technologies/skills demonstrated: - Java, Spring Validation (BindingResult), DTO design and transformation, error handling and messaging, multi-dimensional array validation, and code cleanup/refactoring. Business value: - Fewer defects due to invalid inputs, quicker issue resolution, better customer trust, and a solid foundation for upcoming features in stable matching.

October 2024

1 Commits • 1 Features

Oct 1, 2024

October 2024 Monthly Summary for suyttthideptrai/SS1_2023_StableMatchingSolver_Backend. Focused on strengthening data integrity and validating inputs for the Stable Matching workflow. Implemented custom validation for evaluate functions in NewStableMatchingProblemDTO to ensure syntactic correctness before processing, reducing runtime errors due to malformed inputs. This work aligns with reliability and correctness goals and was tracked under (Session 10) Custom Validation DONE (Waiting for #1 revision). No other major bugs reported this month; efforts prioritized stability and safe data processing.

Activity

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Quality Metrics

Correctness87.4%
Maintainability86.6%
Architecture85.4%
Performance78.6%
AI Usage21.4%

Skills & Technologies

Programming Languages

JSONJavaMarkdown

Technical Skills

API DesignAPI DevelopmentAlgorithm DesignAlgorithm ImplementationBackend DevelopmentDTO ValidationData StructuresData Transfer Objects (DTOs)DocumentationFramework IntegrationJavaJava Spring BootMOEA FrameworkObject-Oriented DesignSoftware Design

Repositories Contributed To

2 repos

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

FitHanuSpecialSubject/GA-Application-Java

Mar 2025 Apr 2025
2 Months active

Languages Used

JavaMarkdownJSON

Technical Skills

API DevelopmentDocumentationSoftware DesignAPI DesignAlgorithm DesignAlgorithm Implementation

suyttthideptrai/SS1_2023_StableMatchingSolver_Backend

Oct 2024 Nov 2024
2 Months active

Languages Used

Java

Technical Skills

Backend DevelopmentJavaSpring BootValidationDTO ValidationData Transfer Objects (DTOs)