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Viachaslau_Khandramai

PROFILE

Viachaslau_khandramai

Viachaslau Khandramai contributed to the development and maintenance of core backend modules such as folio-org/mod-data-export and folio-org/mod-source-record-storage, focusing on data export reliability, performance, and test automation. He implemented features like multi-tenancy support, S3 storage integration, and CSV export enhancements, while modernizing the stack with Java, Spring Boot, and Maven. His work included optimizing SQL queries, introducing caching, and enforcing code quality through tools like spotless-maven-plugin. By refactoring test suites and strengthening CI/CD pipelines, Viachaslau improved deployment confidence and maintainability. His technical depth is reflected in robust API integration, database management, and automated testing practices.

Overall Statistics

Feature vs Bugs

85%Features

Repository Contributions

84Total
Bugs
5
Commits
84
Features
29
Lines of code
29,847
Activity Months15

Work History

February 2026

15 Commits • 1 Features

Feb 1, 2026

February 2026: Focused on strengthening the reliability of the mod-data-export test suite. Delivered substantial test modernization with formatting, refactoring, and dependencies updates to improve readability, stability, and coverage for file upload flows. No major bug fixes were required this month; the primary value came from higher confidence in deployments and reduced CI flakiness due to test improvements.

January 2026

1 Commits • 1 Features

Jan 1, 2026

January 2026 monthly summary for folio-org/folio-spring-support: Delivered an observability improvement by reducing log verbosity during FOLIO tenant initialization, lowering noise during context switching while preserving functional behavior. This supports faster triage and clearer monitoring, aligning with reliability and maintenance goals.

December 2025

2 Commits

Dec 1, 2025

December 2025 performance for folio-org/mod-source-record-storage focused on migration stability for the records_lb table and strengthening rollback safeguards. Delivered a safer migration path for index creation, improved reliability during deployment, and enhanced traceability through issue MODSOURCE-963. Overall, reduced migration risk, improved production resilience, and reinforced governance around migration changes.

November 2025

12 Commits • 2 Features

Nov 1, 2025

Month: 2025-11 – concise performance-focused summary for business review. Key features delivered: - mod-data-export: AI readiness and code quality improvements including test naming refactor, removal of unused imports, build/test configuration adjustments for AI readiness, code coverage setup, and code formatting/style enforcement. Introduction and application of spotless-maven-plugin for consistent formatting. - mod-data-export-worker: S3 storage client library integration by replacing the custom AWS client with the folio-s3-client library to improve compatibility and reliability with S3-compatible storage. Major bugs fixed: - No customer-reported major bugs fixed this month. Focus centered on quality improvements, refactors, and reliability enhancements to reduce flakiness and prepare for AI integration. Overall impact and accomplishments: - Established a strong foundation for AI feature rollout by aligning code, tests, and formatting with AI-readiness goals; improved build/test reliability and maintainability. - Improved storage integration reliability and future-proofing through standard library usage for S3. - Strengthened CI/CD readiness and developer throughput via clear refactors and quality tooling. Technologies/skills demonstrated: - Java/Maven, code quality and formatting tooling (spotless-maven-plugin), test naming and refactor practices, code coverage setup, and external library integration (folio-s3-client).

October 2025

3 Commits • 1 Features

Oct 1, 2025

October 2025 monthly summary for folio-org/mod-inventory-storage. This month focused on automating visibility into RAMLS schema changes and improving maintenance through CI-driven reporting.

August 2025

4 Commits • 2 Features

Aug 1, 2025

Month: 2025-08 — Concise monthly summary focusing on key accomplishments and business value for folio-integration-tests and mod-fqm-manager. Delivered reliability improvements in test automation and enhanced item metadata surfaced to UI/integration layers, enabling more robust integration testing and better data visibility.

July 2025

2 Commits • 1 Features

Jul 1, 2025

Monthly performance summary for 2025-07 focused on folio-org/mod-fqm-manager. Delivered feature to link holdings records to instance records and populate instance details into composite_holdings_record, enriching data with broader context for holdings and improving downstream usability and analytics.

June 2025

6 Commits • 2 Features

Jun 1, 2025

June 2025 monthly summary for folio-org/folio-integration-tests focusing on delivering robust test automation and reliable tenant/test environment cleanup. Key outcomes include secure API testing through Keycloak-based authorization for mgr-* Karate tests, environment-aware authorization flows, and standardized token handling to improve readability and reduce flakiness. Also added purge support for Kafka topics in tenant feature tests to ensure clean, isolated test runs. These changes improve test coverage, security validation, and CI reliability, enabling safer deployments and faster feedback loops.

May 2025

3 Commits • 3 Features

May 1, 2025

May 2025 monthly summary focusing on delivering business value through performance, configurability, and observability improvements across two repositories. Key outcomes include data export performance boost, dynamic test environment configuration, and enhanced observability and documentation for entitlements workflows, supported by updated configuration practices and commit-level traceability.

April 2025

7 Commits • 4 Features

Apr 1, 2025

April 2025 monthly summary focusing on key accomplishments and business value, highlighting data export enhancements, test reliability improvements, and token management across two repositories.

March 2025

11 Commits • 3 Features

Mar 1, 2025

March 2025 monthly summary for development team focusing on delivering business value through platform stabilization, performance improvements, and release readiness across core data export capabilities. Key highlights include the successful Java 21 upgrade and release 5.2.0 for mod-data-export, a notable performance uplift via an increased database connection pool, and a coordinated release of mod-data-export-worker 3.4.0 with modernization across tooling and docs. In parallel, a critical flow improvement in mod-source-record-storage refined tenant initialization to postTenantSync and updated tests, improving stability during onboarding. Overall impact: improved stability, scalability, and readiness for future development cycles; enhanced release documentation and traceability across repositories. Technologies/skills demonstrated: Java 21, Maven release process, Docker/Jenkinsfile migrations, Mockito test modernization, Liquibase-driven migrations, application.yml configuration with environment fallbacks, and comprehensive release notes.

February 2025

7 Commits • 3 Features

Feb 1, 2025

February 2025: Delivered data integrity safeguards, observability improvements, and stack modernization across four repositories. Key outcomes include preventing bulk edits on LINKED_DATA sources to preserve data integrity, expanding test coverage with clearer error messaging, improving tenant visibility, and upgrading the data export stack to Java 21 with modern testing practices. These efforts reduce risk in bulk operations, enhance maintainability, and position the platform for future enhancements.

January 2025

1 Commits • 1 Features

Jan 1, 2025

January 2025 monthly summary for folio-org/mod-data-export-worker. Delivered a new Data Export Worker Instance Status Interface to standardize and track the lifecycle of data export tasks, improving observability and management of exports. The change is anchored by commit aa75594f2804b08ffcfb648355025e1b49836a19 ("Missed instance status interface (#616)"). There were no major bug fixes this month; the focus was on feature delivery and establishing groundwork for future reliability enhancements. This work increases business value by enabling faster diagnosis, smoother task orchestration, and easier future extensions for monitoring and retry logic within the data export workflow.

December 2024

3 Commits • 2 Features

Dec 1, 2024

December 2024 monthly summary for folio-org development: delivered security hardening, scalability groundwork, and performance improvements across data export services. Key outcomes include security vulnerability remediation in the data export module, groundwork for multi-tenant architecture in Spring, and a new caching layer to accelerate reference data access in the worker service. These changes reduce risk, prepare the platform for scalable deployments, and improve runtime efficiency with minimal user-facing changes.

November 2024

7 Commits • 3 Features

Nov 1, 2024

November 2024: Focused on data export reliability, module descriptor integrity, and release readiness across the Folio data export modules. Delivered data completeness improvements, stabilized integration points, and streamlined release processes, driving business value through more accurate exports and smoother deployments.

Activity

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Quality Metrics

Correctness92.2%
Maintainability92.2%
Architecture89.2%
Performance86.0%
AI Usage23.6%

Skills & Technologies

Programming Languages

BashCSVDockerfileGherkinGroovyJSONJSON5JavaJavaScriptMarkdown

Technical Skills

AI integrationAPI ClientAPI DevelopmentAPI IntegrationAPI TestingAWSAuthorizationBackend DevelopmentBuild ManagementBuild ToolsCI/CDCSV ExportCSV FormattingCachingClean Code Practices

Repositories Contributed To

7 repos

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

folio-org/mod-data-export

Nov 2024 Feb 2026
6 Months active

Languages Used

JavaXMLGroovyMarkdownSQLYAML

Technical Skills

API ClientBackend DevelopmentJavaModule Descriptor ConfigurationModule Descriptor ManagementDependency Management

folio-org/folio-integration-tests

Feb 2025 Aug 2025
5 Months active

Languages Used

CSVGherkinJavaScriptJava

Technical Skills

API TestingIntegration TestingTest AutomationConfiguration ManagementEnvironment SetupAuthorization

folio-org/mod-data-export-worker

Nov 2024 Nov 2025
7 Months active

Languages Used

JavaMarkdownDockerfileGroovyCSVYAML

Technical Skills

API IntegrationBackend DevelopmentCode RefactoringFeign ClientJavaRelease Management

folio-org/mod-source-record-storage

Feb 2025 Dec 2025
4 Months active

Languages Used

JavaMarkdownSQLXML

Technical Skills

API DevelopmentBackend DevelopmentLoggingDatabase MigrationDatabase OptimizationSQL Indexing

folio-org/mod-fqm-manager

Jul 2025 Aug 2025
2 Months active

Languages Used

JSON5Java

Technical Skills

Backend DevelopmentConfiguration ManagementData Modeling

folio-org/mod-inventory-storage

Oct 2025 Oct 2025
1 Month active

Languages Used

BashJSONYAML

Technical Skills

CI/CDGitGitHub ActionsJSON SchemaShell Scripting

folio-org/folio-spring-support

Jan 2026 Jan 2026
1 Month active

Languages Used

Java

Technical Skills

Javabackend developmentlogging management