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ldlharper

PROFILE

Ldlharper

Liam Harper developed and enhanced core features for the ministryofjustice/hmpps-remand-and-sentencing and hmpps-record-a-recall repositories, focusing on data integrity, recall lifecycle management, and backend modernization. He implemented cross-record validation and user-facing correction flows to ensure sentence data consistency, and led data migration and schema evolution for NOMIS recall integration. Using Java, TypeScript, and Spring Boot, Liam refactored API endpoints, introduced role-based access control, and modernized build pipelines with esbuild. His work addressed complex data reconciliation, improved regulatory compliance, and enabled scalable, maintainable backend systems, demonstrating depth in backend development, API design, and secure, test-driven engineering practices.

Overall Statistics

Feature vs Bugs

79%Features

Repository Contributions

37Total
Bugs
4
Commits
37
Features
15
Lines of code
63,137
Activity Months6

Work History

October 2025

2 Commits • 1 Features

Oct 1, 2025

October 2025 monthly summary for HMPOs development work focusing on business value and technical progress across the ministry of justice record-a-recall project.

June 2025

11 Commits • 3 Features

Jun 1, 2025

June 2025 monthly summary focused on stabilizing recall data flows, enhancing data integrity, and broadening API coverage across hmpps-remand-and-sentencing-api and hmpps-record-a-recall. Delivered feature work to support safer, more maintainable recall processing, alongside targeted fixes to prevent data corruption and streamline reconciliation.

May 2025

14 Commits • 4 Features

May 1, 2025

May 2025: Delivered substantial enhancements across the recall ecosystem, focusing on data integrity, migration readiness, and secure access. Key outcomes include: Key features delivered: - Recall Deletion and Lifecycle Enhancements (hmpps-remand-and-sentencing-api): fixed deletion of recall data when sentences are removed; added a deletion endpoint; ensured proper handling of previousRecallId in deletion events to maintain data consistency, enabling reliable lifecycle management. - Return to Custody Date Integration (hmpps-remand-and-sentencing-api): added returnToCustodyDate support across RecallEntity and LegacySentence DTO; enables migration and display of return-to-custody dates for recalls, with accompanying tests and updates. - Mapping and Data Alignment for NOMIS Integration (hmpps-remand-and-sentencing-api): improved NOMIS recall data mapping accuracy by enhancing sentence type mappings and related event metadata for recalls. - Legacy Recall Sync Endpoints and Access Control (hmpps-remand-and-sentencing-api): added legacy recall synchronization endpoints, enhanced recall search and access control to support bulk retrieval and secure access. - Recall Feature Access Control (hmpps-record-a-recall): introduced role-based access control by adding the ROLE_RECALL_MAINTAINER role to the stubbed sign-in response and applying authorization middleware, ensuring only recall-maintainer users can access recall functionalities. Major bugs fixed: - Recalled deletion edge-case when sentences are removed: ensured consistent deletion across systems with updated events and endpoints (commit references include 76128ae8cb0076cf87f0dc5c2162e70644caa73d, ce1ff6c70c9e6540f5d53c9f113932ad1c91b1b3, 77ba737265737a4fb12783a59ece95ef34b4445d). Overall impact and accomplishments: - Improved data integrity and lifecycle hygiene across recall data, reducing risk of orphaned references and inconsistencies when sentences are modified. - Migration- and analytics-ready data model with Return to Custody Date support, enabling better reporting and user experience. - Secure, scalable access to legacy recall data via new endpoints and role-based access controls, supporting bulk retrieval and governance requirements. - Demonstrated end-to-end improvements across three focus areas: data correctness, interoperability with NOMIS, and security/compliance. Technologies/skills demonstrated: - Java/Spring Boot REST services, DTO mappings, and endpoint design. - NOMIS data integration and event metadata mapping improvements. - Test coverage updates corresponding to data model changes. - Role-based access control and middleware for sensitive recall data.

April 2025

5 Commits • 2 Features

Apr 1, 2025

April 2025 monthly summary for ministryofjustice/hmpps-remand-and-sentencing-api: Focused on extending recall period handling and advancing data migration to NOMIS recalls, aligning with RAS for auditability and cross-system interoperability. Delivered two major capability areas: (1) Period Length Mapping Enhancements to support SOPC and recall periods, with updated calculation types and CUSTODIAL_TERM logic, and new tests; (2) NOMIS Recalls Integration with Recall Data Migration and Schema Updates, including recall-specific entities, migration refactors, and updated recall table schema. These changes improve recall processing accuracy, compliance, and system readiness for future recall-related work. Technologies demonstrated include API back-end development, data migrations, schema evolution, test-driven validation, and cross-system integration.

January 2025

4 Commits • 4 Features

Jan 1, 2025

January 2025 focused on delivering data-driven prisoner workflows and centralized backend configuration to improve accuracy, reduce manual updates, and enable scalable UI changes across three core repositories. The work enhances start-page, home-page, and things-to-do experiences by relying on backend data rather than static flags, enabling more reliable decision support for staff and more maintainable features for future iterations.

November 2024

1 Commits • 1 Features

Nov 1, 2024

November 2024: Implemented a data integrity feature for the HM Prison and Probation Service remand and sentencing workflow. Delivered warrant vs appearance sentence-length consistency check that validates the total sentence length entered for a warrant against the sum of individual sentences for an appearance, and exposes a user-facing page to acknowledge or correct discrepancies. The change tightens data consistency between warrant and offence records, reduces downstream reconciliation effort, and supports regulated data accuracy.

Activity

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Quality Metrics

Correctness87.2%
Maintainability88.2%
Architecture87.4%
Performance79.0%
AI Usage22.2%

Skills & Technologies

Programming Languages

BashJavaJavaScriptKotlinNunjucksSCSSSQLTypeScriptYAML

Technical Skills

API Client DevelopmentAPI DesignAPI DevelopmentAPI IntegrationAPI mockingBackend DevelopmentBackend IntegrationBackend developmentBash ScriptingBuild Tools (esbuild)CI/CDConfiguration ManagementData MappingData MigrationData Modeling

Repositories Contributed To

4 repos

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

ministryofjustice/hmpps-remand-and-sentencing-api

Apr 2025 Jun 2025
3 Months active

Languages Used

JavaKotlinSQL

Technical Skills

API DevelopmentBackend DevelopmentData MigrationData ModelingDatabase ManagementDatabase Migration

ministryofjustice/hmpps-record-a-recall

Jan 2025 Oct 2025
4 Months active

Languages Used

JavaScriptTypeScriptYAMLBashSCSS

Technical Skills

API Client DevelopmentBackend IntegrationConfiguration ManagementHelmNode.jsTypeScript

ministryofjustice/hmpps-remand-and-sentencing

Nov 2024 Jan 2025
2 Months active

Languages Used

JavaJavaScriptTypeScriptNunjucks

Technical Skills

API IntegrationBackend DevelopmentFrontend DevelopmentTestingUI/UX DevelopmentAPI Client Development

ministryofjustice/hmpps-court-cases-release-dates

Jan 2025 Jan 2025
1 Month active

Languages Used

JavaScriptNunjucksTypeScript

Technical Skills

API IntegrationBackend DevelopmentConfiguration ManagementFrontend DevelopmentRefactoringTesting

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