
Matthew Green developed and maintained core release-date calculation services for the Ministry of Justice, focusing on the calculate-release-dates and calculate-release-dates-api repositories. He engineered robust backend features in Java, Kotlin, and TypeScript, implementing complex validation logic, audit trails, and feature toggles to support evolving legal requirements. His work included API enhancements, database schema improvements, and integration of security measures such as CSRF protection. By refactoring calculation flows and automating deployment processes with Docker and CI/CD, Matthew improved reliability, compliance, and developer productivity. His contributions demonstrated depth in backend development, data modeling, and end-to-end testing, ensuring policy-aligned, maintainable systems.

October 2025 monthly emphasis on delivering reliability, compliance, and CI/CD efficiency across release-date tooling. This month featured targeted bug fixes, data-model enhancements, and modernization efforts across three repositories to improve business value and technical stability.
October 2025 monthly emphasis on delivering reliability, compliance, and CI/CD efficiency across release-date tooling. This month featured targeted bug fixes, data-model enhancements, and modernization efforts across three repositories to improve business value and technical stability.
September 2025 monthly summary for the release-dates domain. Delivered key features and fixes across ministryofjustice/calculate-release-dates and ministryofjustice/calculate-release-dates-api, focusing on business value: improved release date accuracy, reduced manual effort, and strengthened validation and policy compliance. Major work combined enhancements to the manual entry flow, API-level deduplication, repeal-rule handling via feature toggles, and clearer NOMIS error messaging. This cycle also included targeted fixes to ensure calculations can proceed when users select 'None of the above' and safeguards for re-approval of previous calculations. Impact highlights include a streamlined user journey for caseworkers, reduced risk of duplicate calculations, and faster, more reliable release-date decisions aligned with policy changes. The work was accompanied by improved integration tests and environment configuration updates to support feature flags and validation messaging. Key technical outcomes include: improved session-based storage for manual entry, backlinks between date input steps, redirect safeguards, API-level checks to skip unnecessary manual calculations, a feature-toggle for post-recall repeal rules, and explicit NOMIS line references in validation messages.
September 2025 monthly summary for the release-dates domain. Delivered key features and fixes across ministryofjustice/calculate-release-dates and ministryofjustice/calculate-release-dates-api, focusing on business value: improved release date accuracy, reduced manual effort, and strengthened validation and policy compliance. Major work combined enhancements to the manual entry flow, API-level deduplication, repeal-rule handling via feature toggles, and clearer NOMIS error messaging. This cycle also included targeted fixes to ensure calculations can proceed when users select 'None of the above' and safeguards for re-approval of previous calculations. Impact highlights include a streamlined user journey for caseworkers, reduced risk of duplicate calculations, and faster, more reliable release-date decisions aligned with policy changes. The work was accompanied by improved integration tests and environment configuration updates to support feature flags and validation messaging. Key technical outcomes include: improved session-based storage for manual entry, backlinks between date input steps, redirect safeguards, API-level checks to skip unnecessary manual calculations, a feature-toggle for post-recall repeal rules, and explicit NOMIS line references in validation messages.
August 2025 monthly summary highlighting targeted improvements in data validation and deployment automation across two repositories. Key outcomes aligned with business value: improved data integrity for Nomis inputs, clearer user guidance when data is missing or invalid, and deployment agility through dynamic versioning of the PostgreSQL restore script.
August 2025 monthly summary highlighting targeted improvements in data validation and deployment automation across two repositories. Key outcomes aligned with business value: improved data integrity for Nomis inputs, clearer user guidance when data is missing or invalid, and deployment agility through dynamic versioning of the PostgreSQL restore script.
July 2025 monthly summary focused on delivering reliable release-date calculations and improving user-facing messaging, with a strong emphasis on correctness, test coverage, and maintainability. Key features delivered: - Sentence Processing API Enhancements: Added a new endpoint to determine availability of early release schemes for sentences, including a new controller, service, and model, with integration and unit tests. This included two related commits enabling the endpoint and broadening eligibility validation. - CRDS ersed eligibility endpoint integration in calculate-release-dates service: Replaced custom eligibility logic with a standardized API call to determine ersed eligibility, updated integration tests and type definitions. - UI text simplification (consecutive sentence message): Removed a UI sentence about consecutive sentences to simplify user messaging. - Maintenance: Build tooling upgrade to Gradle Spring Boot plugin 8.3.0 to keep tooling current and supported. Major bugs fixed: - Sentence processing and calculation correctness improvements: Improved handling of overlapping sentence parts for grouping and calculation, and ignored specific validation messages during calculation to prevent spurious failures. Overall impact and accomplishments: - Increased reliability and accuracy of release-date calculations and eligibility determinations, reducing the risk of incorrect outputs and spurious failures. - Improved developer experience and deployment stability through up-to-date build tooling and cleaner UI messaging. Technologies/skills demonstrated: - Java, Spring Boot, API design, testing (integration and unit tests), and cross-service integration. - Gradle-based build tooling, version upgrades, and CI-friendly change management. - UI/UX refinement based on user feedback and clear, concise messaging.
July 2025 monthly summary focused on delivering reliable release-date calculations and improving user-facing messaging, with a strong emphasis on correctness, test coverage, and maintainability. Key features delivered: - Sentence Processing API Enhancements: Added a new endpoint to determine availability of early release schemes for sentences, including a new controller, service, and model, with integration and unit tests. This included two related commits enabling the endpoint and broadening eligibility validation. - CRDS ersed eligibility endpoint integration in calculate-release-dates service: Replaced custom eligibility logic with a standardized API call to determine ersed eligibility, updated integration tests and type definitions. - UI text simplification (consecutive sentence message): Removed a UI sentence about consecutive sentences to simplify user messaging. - Maintenance: Build tooling upgrade to Gradle Spring Boot plugin 8.3.0 to keep tooling current and supported. Major bugs fixed: - Sentence processing and calculation correctness improvements: Improved handling of overlapping sentence parts for grouping and calculation, and ignored specific validation messages during calculation to prevent spurious failures. Overall impact and accomplishments: - Increased reliability and accuracy of release-date calculations and eligibility determinations, reducing the risk of incorrect outputs and spurious failures. - Improved developer experience and deployment stability through up-to-date build tooling and cleaner UI messaging. Technologies/skills demonstrated: - Java, Spring Boot, API design, testing (integration and unit tests), and cross-service integration. - Gradle-based build tooling, version upgrades, and CI-friendly change management. - UI/UX refinement based on user feedback and clear, concise messaging.
June 2025 performance summary for the ministry of justice release date calculation projects. Focused on delivering backend and frontend improvements with clear business value and reduced risk through feature toggles, refactors, and targeted tests. Key outcomes include a frontend dependency upgrade, historic SLED calculations, manual journey processing toggles, and month-based duration calculations, underpinned by enhanced validation and test coverage.
June 2025 performance summary for the ministry of justice release date calculation projects. Focused on delivering backend and frontend improvements with clear business value and reduced risk through feature toggles, refactors, and targeted tests. Key outcomes include a frontend dependency upgrade, historic SLED calculations, manual journey processing toggles, and month-based duration calculations, underpinned by enhanced validation and test coverage.
May 2025: Delivered core feature enhancements and stability improvements across two repositories. In ministryofjustice/calculate-release-dates-api, implemented bulk calculation validation enhancements (dedicated bulkCalcValidation flag; refactored sentence validation; updated validation codes/utilities) and improved handling for consecutive sentences with multiple offenses; rolled out concurrent consecutive sentences processing via a production feature flag; fixed HDCED calculation correctness for pre/post HDC365 boundary with added tests; and performed extensive maintenance/infrastructure upgrades (dependency updates, Spring Boot/testing config updates, AWS SDK migration, database pool tuning, environment/config adjustments). In ministryofjustice/calculate-release-dates, completed frontend initialization refactor and dependencies tuning (downgraded appinsights to v2, removed mojFrontendInit.js, added index.js to initialize govuk-frontend and @ministryofjustice/frontend) and backend framework/runtime stack upgrades (Express.js to v5, Node.js environment to 22.15, removal of custom asyncMiddleware, improved null handling). These efforts collectively improve accuracy, throughput, reliability, and developer productivity, enabling safer production deployments and faster, policy-compliant release date calculations.
May 2025: Delivered core feature enhancements and stability improvements across two repositories. In ministryofjustice/calculate-release-dates-api, implemented bulk calculation validation enhancements (dedicated bulkCalcValidation flag; refactored sentence validation; updated validation codes/utilities) and improved handling for consecutive sentences with multiple offenses; rolled out concurrent consecutive sentences processing via a production feature flag; fixed HDCED calculation correctness for pre/post HDC365 boundary with added tests; and performed extensive maintenance/infrastructure upgrades (dependency updates, Spring Boot/testing config updates, AWS SDK migration, database pool tuning, environment/config adjustments). In ministryofjustice/calculate-release-dates, completed frontend initialization refactor and dependencies tuning (downgraded appinsights to v2, removed mojFrontendInit.js, added index.js to initialize govuk-frontend and @ministryofjustice/frontend) and backend framework/runtime stack upgrades (Express.js to v5, Node.js environment to 22.15, removal of custom asyncMiddleware, improved null handling). These efforts collectively improve accuracy, throughput, reliability, and developer productivity, enabling safer production deployments and faster, policy-compliant release date calculations.
April 2025 monthly summary for development work focused on release-dates APIs and calculation logic. Delivered feature parity and robustness improvements, expanded validation, and improved user experience for manual-entry scenarios. Strong integration test coverage accompanies changes to ensure reliability in production deployments.
April 2025 monthly summary for development work focused on release-dates APIs and calculation logic. Delivered feature parity and robustness improvements, expanded validation, and improved user experience for manual-entry scenarios. Strong integration test coverage accompanies changes to ensure reliability in production deployments.
March 2025 monthly summary for the Ministry of Justice release-dates projects. Delivered significant enhancements to auditability, configurability, and calculation accuracy across two repositories, with a strong emphasis on business value and technical robustness. Key features and reliability improvements were implemented in Calculate-Release-Dates and its API, alongside UI improvements and refactors that reduce risk and enable safer deployments.
March 2025 monthly summary for the Ministry of Justice release-dates projects. Delivered significant enhancements to auditability, configurability, and calculation accuracy across two repositories, with a strong emphasis on business value and technical robustness. Key features and reliability improvements were implemented in Calculate-Release-Dates and its API, alongside UI improvements and refactors that reduce risk and enable safer deployments.
February 2025 monthly summary for ministryofjustice/calculate-release-dates-api focusing on key business value and technical achievements. Delivered major feature updates, improved validation and production readiness, and strengthened data integrity and error handling to enable safer, faster deployments.
February 2025 monthly summary for ministryofjustice/calculate-release-dates-api focusing on key business value and technical achievements. Delivered major feature updates, improved validation and production readiness, and strengthened data integrity and error handling to enable safer, faster deployments.
January 2025 Monthly Summary (Performance Review-ready). Focuses on business value delivered, critical fixes, and the technical skills demonstrated across two release-date projects.
January 2025 Monthly Summary (Performance Review-ready). Focuses on business value delivered, critical fixes, and the technical skills demonstrated across two release-date projects.
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