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mdayican

PROFILE

Mdayican

Mert Dayıcan developed and maintained core backend features and testing infrastructure across HMCTS repositories, including em-native-pdf-annotator-app and document-management-store-app. He engineered robust contract testing suites using Java and Pact, ensuring API reliability and early detection of integration issues. Mert modernized test frameworks with JUnit 5, refactored test code for maintainability, and improved CI/CD pipelines for reproducible builds. His work included database migrations, PDF manipulation logic, and Hibernate ORM upgrades, addressing both functional requirements and technical debt. By enhancing test determinism, observability, and contract assurance, Mert delivered maintainable solutions that improved release confidence and supported evolving document management workflows.

Overall Statistics

Feature vs Bugs

88%Features

Repository Contributions

67Total
Bugs
3
Commits
67
Features
23
Lines of code
8,770
Activity Months11

Work History

October 2025

6 Commits • 2 Features

Oct 1, 2025

October 2025 monthly summary focusing on delivered features, code quality improvements, and business impact across two repositories: hmcts/document-management-store-app and hmcts/em-annotation-api. Key outcomes include enhanced auditing and performance for MIME type changes, plus substantial code quality and test-suite improvements that improve maintainability and QA reliability.

September 2025

6 Commits • 2 Features

Sep 1, 2025

September 2025 performance summary for hmcts/document-management-store-app: Focused on strengthening contract testing, scaling test infrastructure, and stabilizing CI. Key features delivered include a Document Contract Testing Suite with pact coverage for core document endpoints (GET by ID, search, download, multipart upload). Also, infrastructure improvements upgraded the AAT PostgreSQL storage to 512GB to support growth and reliability of data-intensive tests. Fixed nightly build failures by updating test assets. These efforts improved external consumer contract assurance, test reliability, and CI stability, enabling faster feedback and safer deployments. Technologies/skills demonstrated: Pact contract testing, AAT environment configuration, PostgreSQL storage scaling, CI/CD stability, and test asset management.

August 2025

6 Commits • 2 Features

Aug 1, 2025

August 2025 monthly summary focusing on contract testing and test observability to strengthen API reliability and data access across two HMCTS services. Delivered Pact-based contract coverage for all Document Content Version endpoints, including POST version (multipart uploads), legacy upload path, GET by version, and binary content retrieval, and refined test logging for build tasks in the stitching API. These efforts increased confidence in consumer-provider contracts, improved debugging capabilities, and laid groundwork for faster regression detection and safer deployments.

July 2025

5 Commits • 2 Features

Jul 1, 2025

In July 2025, delivered focused improvements to Pact-based contract testing for the document-management-store-app, enhancing reliability, coverage, and CI/CD readiness while safeguarding cross-system contracts.

June 2025

13 Commits • 6 Features

Jun 1, 2025

June 2025 monthly summary – HMCTS development Key deliverables across repositories: - hmcts/em-native-pdf-annotator-app: Implemented Pact contract tests for the redaction API (POST /api/redaction) with consumer and provider tests and a sample redacted PDF to validate contracts; followed by a pact fix to stabilize tests (EM-6674). - hmcts/em-native-pdf-annotator-app: Hibernate/Jackson dependency migrations and configuration to modern packaging and improved compatibility (repackaging and ORM updates). - hmcts/em-native-pdf-annotator-app: Staging environment SQL and data logging enabled to support debugging and performance diagnostics. - hmcts/em-native-pdf-annotator-app: Idam consumer test refactor to focus on user details verification with an existing access token. - hmcts/em-annotation-api: Hibernate 6 upgrade and Jackson Hibernate6Module integration for compatibility and future-proofing. - hmcts/document-management-store-app: Hibernate ORM dependency migration to the new group ID org.hibernate.orm and removal of obsolete jackson-datatype-hibernate5-jakarta to align with updated Hibernate libraries. Major bugs fixed: - Pact contract tests stabilization for redaction API (EM-6674) and related adjustments to ensure reliable contract verification. Overall impact and accomplishments: - Strengthened API contract assurance, reduced test flakiness, and prepared key services for future ORM upgrades. - Improved observability in staging through SQL/logging instrumentation, enabling faster debugging and performance diagnostics. - Streamlined test maintenance for Idam flows and standardized Hibernate dependencies across modules, reducing technical debt. Technologies/skills demonstrated: - Pact testing, Hibernate ORM 6, Jackson module integration, dependency management and packaging refactors, test refactoring, and staging observability instrumentation.

May 2025

5 Commits • 1 Features

May 1, 2025

May 2025: Implemented Pact contract tests for Markups and Redactions Endpoints and refactored test package structure in hmcts/em-native-pdf-annotator-app. The work spans five commits introducing contract tests for retrieve, update, delete markups and redactions, and a package-structure refactor to improve organization and maintainability. No major bugs fixed this month; the focus was on expanding contract coverage and test reliability to reduce release risk.

April 2025

4 Commits • 2 Features

Apr 1, 2025

April 2025 performance summary: Key features delivered across two repositories, major reliability fix, and testing/contract enhancements. Key items: 1) hmcts/em-native-pdf-annotator-app: PDF Redaction Reliability and Repair — added a retry mechanism for storing redactions, a PDF repair function for corrupted files, and a test validating retry behavior. 2) Pact Testing Setup for em-native-pdf-annotator-app — introduced consumer-provider Pact testing with Jenkins pipeline and Gradle builds to enable pact verification, plus Java tests for consumer/provider contracts. 3) hmcts/wa-task-management-api: Test Suite Quality Improvements — refactoring to remove unused locals/mocks, simplified TaskAssignmentsRepository instantiation for tests, and standardized assertions with idiomatic AssertJ.

March 2025

3 Commits • 1 Features

Mar 1, 2025

March 2025: Strengthened redaction accuracy and maintainability for rotated PDFs in hmcts/em-native-pdf-annotator-app. Implemented robust mapping of redaction rectangles on 0/90/180/270-degree pages, refactored coordinate calculations to rely on the crop box for non-rotated pages, and expanded test coverage to validate correctness across all rotations. These changes reduce leakage risk, improve compliance readiness, and establish a solid foundation for future enhancements.

February 2025

4 Commits • 2 Features

Feb 1, 2025

February 2025 performance summary for hmcts/em-native-pdf-annotator-app. Key features delivered include PdfRedaction Logging Enhancements and Helm Chart OCI Registry Deployment Update. Major bugs fixed: none identified this month; stability improved through enhanced observability and deployment configuration. Business impact includes improved auditability of the redaction process, faster issue diagnosis, and streamlined, reproducible deployments with OCI-based artifacts. Technologies and skills demonstrated: observability instrumentation, Helm charts, OCI registry usage, and strong commit traceability across EM-6414 and EM-6499.

January 2025

13 Commits • 1 Features

Jan 1, 2025

January 2025 performance summary focused on strengthening test quality and data integrity while delivering foundational improvements to test infrastructure. The work delivered major test framework upgrades, modernized test configuration and mocking strategies, and reinforced domain validation to support faster, more reliable releases for critical document and annotation features. These efforts reduce flaky tests, speed up feedback loops, and improve confidence in code changes impacting document management and annotation domains.

November 2024

2 Commits • 2 Features

Nov 1, 2024

Concise monthly summary for November 2024 covering two repositories. Focused on delivering reliable test environments through deterministic image sourcing and Testcontainers customizations to ensure consistent, reproducible tests in both AAT and unit test contexts. Emphasis on business value through reduced CI/test flakiness, faster feedback, and clearer traceability of changes.

Activity

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Quality Metrics

Correctness90.8%
Maintainability91.2%
Architecture85.6%
Performance80.8%
AI Usage20.2%

Skills & Technologies

Programming Languages

GradleGroovyHCLJSONJavaSQLYAML

Technical Skills

API DevelopmentAPI TestingAssertJBackend DevelopmentBuild AutomationBuild ConfigurationBuild EngineeringBuild ManagementBuild ToolsCI/CDCI/CD ConfigurationConfigurationConfiguration ManagementContract TestingCoordinate Systems

Repositories Contributed To

5 repos

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

hmcts/document-management-store-app

Jan 2025 Oct 2025
6 Months active

Languages Used

GradleGroovyJavaYAMLHCLSQL

Technical Skills

API TestingBuild ConfigurationBuild ManagementContract TestingDependency ManagementFunctional Testing

hmcts/em-native-pdf-annotator-app

Nov 2024 Jun 2025
6 Months active

Languages Used

JavaYAMLGroovyGradle

Technical Skills

CI/CDDockerJavaTestcontainersBackend DevelopmentConfiguration

hmcts/em-annotation-api

Nov 2024 Oct 2025
4 Months active

Languages Used

JavaGradleJSON

Technical Skills

CI/CD ConfigurationDockerJava DevelopmentTestcontainersAPI DevelopmentBackend Development

hmcts/wa-task-management-api

Apr 2025 Apr 2025
1 Month active

Languages Used

Java

Technical Skills

AssertJJavaRefactoringUnit Testing

hmcts/em-stitching-api

Aug 2025 Aug 2025
1 Month active

Languages Used

Gradle

Technical Skills

Build AutomationTesting

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