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ldlharper

PROFILE

Ldlharper

Luke Harper delivered robust release-date calculation and remand management features across the ministryofjustice/calculate-release-dates-api and related repositories. He engineered modular validation and recall workflows, integrating external data sources and supporting complex eligibility logic for recalls and early releases. Using Java, Kotlin, and Spring Boot, Luke refactored core calculation engines, introduced configuration-driven behavior, and enhanced data integrity with improved error handling and traceability. His work included scalable batch processing with AWS SQS, resilient API integrations, and frontend enhancements for data visibility. The solutions addressed evolving justice requirements, demonstrating depth in backend development, system integration, and maintainable, testable code architecture.

Overall Statistics

Feature vs Bugs

65%Features

Repository Contributions

248Total
Bugs
45
Commits
248
Features
84
Lines of code
225,156
Activity Months12

Work History

October 2025

17 Commits • 5 Features

Oct 1, 2025

Month: 2025-10. This period delivered significant business value through hardened release-date calculations, enhanced recall processing, and improved data integrity. Highlights include updated recall workflows, stronger validation, and improved resilience to incomplete external data. A notable intercept bug fix in identify-remand-periods contributed to correct remand handling and charge ID rendering.

September 2025

21 Commits • 7 Features

Sep 1, 2025

September 2025 monthly summary focusing on key features delivered, major bugs fixed, overall impact, and technologies demonstrated. Highlights span multiple repositories with improvements to release-date calculations, recall management, and data processing, driving accuracy, reliability, and business value.

August 2025

11 Commits • 6 Features

Aug 1, 2025

August 2025: Delivered cross-repo enhancements to release-date calculation, data processing, and configuration-driven behavior, prioritizing stability, scalability, and business value. Improvements span performance optimizations, enhanced release configurability, robust error handling, data integrity, and feature toggles to support faster, safer release cycles and larger batch processing.

July 2025

15 Commits • 7 Features

Jul 1, 2025

July 2025: Delivered production risk reduction, test infrastructure modernization, and platform stability improvements across four repos. Key business outcomes include safer production edits, more reliable tests, configurable release logic, improved data integrity, and stronger security/performance in cloud environments.

June 2025

11 Commits • 4 Features

Jun 1, 2025

June 2025 monthly summary focused on delivering features that improve data integrity, validation, and traceability, while strengthening release-date calculations and timeline accuracy across four repos. Notable deliveries include a new record-a-recall API endpoint with integrated validation, optional inactive-data validation, enhanced release-date calculations with previous bookings and ExternalSentenceId for better traceability, and robust fixes to UAL/tranche logic. A timeline-aware booking sequence was also added to the Prison API to enable ordered event timelines.

May 2025

12 Commits • 4 Features

May 1, 2025

May 2025 performance summary focusing on delivering automated data workflows, improving remand calculations with external data sources, and strengthening test/deploy reliability across two MOJ repositories. The work targeted business value by enabling safer preproduction data refreshes, more accurate remand period logic, and more reliable CI/CD pipelines.

April 2025

31 Commits • 8 Features

Apr 1, 2025

April 2025 performance summary focusing on delivering robust remand period tooling, accurate release-date calculations, and API integrations across multiple services. This month included critical bug fixes, architectural refinements, and enablement of manual remand entry to improve resilience and business capability across justice workflow applications.

March 2025

50 Commits • 13 Features

Mar 1, 2025

March 2025 monthly summary focusing on delivering scalable APIs, reliable batch processing, enhanced release visibility, and improved remand calculations across the MOJ suite. Key API tooling, bulk processing overhauls, clearer release planning, and data-model upgrades underpin the business value delivered this month.

February 2025

11 Commits • 5 Features

Feb 1, 2025

February 2025 monthly summary focusing on key feature deliveries, reliability improvements, and security/access enhancements across repositories. Highlights include environment-aware feature toggles, data model improvements for remand decisions, cache eviction improvements with a corrected eviction endpoint, enhanced DPR reporting access controls, and calculation accuracy groundwork with data handling options.

January 2025

28 Commits • 14 Features

Jan 1, 2025

January 2025 performance summary for core delivery across HM Prison Services repositories. Delivered a set of feature-rich adjustments and API enhancements that improve operational accuracy, access control, and backend-driven UI configuration. Highlights include enabling prisoner adjustments for released inmates, aligning navigation with backend service definitions, refactoring the Adjustments Hub flow, and integrating external movements into the calculation engine. Also delivered targeted bug fixes, dependency cleanups, and environment-driven feature toggles that support safer rollouts and clearer compliance. Key business outcomes: improved search/adjustments accuracy for released prisoners; backend-configured navigation reduces feature flag fragmentation; richer data context for CRDS bulk calculations; and more reliable, testable calculation workflows. Technologies and practices demonstrated: API design and alignment, OpenAPI service definitions, backend-driven UI configuration, JSON type mapping, UI/UX refactor, data validation, feature toggles, and comprehensive test coverage.

December 2024

32 Commits • 8 Features

Dec 1, 2024

December 2024 performance summary: Strengthened release-date accuracy, remand processing reliability, and data visibility across core domains. Delivered code-based Release Point Configuration centralization, corrected timeline logic (UAL adjustments limited to recall) with accompanying tests, expanded imprisonment status data modeling and API exposure, and exposed a Historical Imprisonment Status History API. Also integrated frontend telemetry via Azure Application Insights. These efforts reduce configuration risk, improve data quality and compliance readiness, and provide richer telemetry for performance monitoring.

November 2024

9 Commits • 3 Features

Nov 1, 2024

November 2024 focused on delivering business value through targeted feature enhancements, robust validation and recall handling, privacy improvements for testing data, and a refactor of the timeline service. The work spans two repositories: ministryofjustice/calculate-release-dates-api and ministryofjustice/hmpps-identify-remand-periods-api, with measurable improvements in reliability, data fidelity, and developer productivity.

Activity

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Quality Metrics

Correctness85.4%
Maintainability86.2%
Architecture82.8%
Performance76.0%
AI Usage20.4%

Skills & Technologies

Programming Languages

CSVDockerfileGradleHCLHTMLJavaJavaScriptKotlinNunjucksSQL

Technical Skills

API ConfigurationAPI DesignAPI DevelopmentAPI IntegrationAWSAWS SQSAnalytics IntegrationAsynchronous ProcessingAuthenticationAuthorizationAzure Application InsightsBack End DevelopmentBackend DevelopmentBackend developmentBug Fixing

Repositories Contributed To

7 repos

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

ministryofjustice/calculate-release-dates-api

Nov 2024 Oct 2025
11 Months active

Languages Used

CSVJavaKotlinYAMLSQLGradle

Technical Skills

API DevelopmentBackend DevelopmentCode CleanupData AnonymizationData ModelingIntegration Testing

ministryofjustice/hmpps-identify-remand-periods-api

Nov 2024 Sep 2025
9 Months active

Languages Used

YAMLCSVKotlinGradleJavaSQLyaml

Technical Skills

Configuration ManagementDevOpsAPI DevelopmentAPI IntegrationBackend DevelopmentData Modeling

ministryofjustice/hmpps-identify-remand-periods

Dec 2024 Oct 2025
6 Months active

Languages Used

JavaScriptNunjucksTypeScriptDockerfileHTMLYAML

Technical Skills

API IntegrationAnalytics IntegrationAzure Application InsightsBackend DevelopmentData ModelingExpress.js

ministryofjustice/hmpps-adjustments

Jan 2025 Aug 2025
6 Months active

Languages Used

JavaScriptNunjucksTypeScripttypescriptyaml

Technical Skills

API DevelopmentAPI IntegrationBackend DevelopmentConfiguration ManagementFrontend DevelopmentJavaScript

ministryofjustice/calculate-release-dates

Jan 2025 Oct 2025
7 Months active

Languages Used

JavaScriptNunjucksTypeScriptYAMLyaml

Technical Skills

API DevelopmentAPI IntegrationBack End DevelopmentBackend DevelopmentBackend developmentConfiguration Management

ministryofjustice/prison-api

Dec 2024 Sep 2025
5 Months active

Languages Used

JavaKotlinSQL

Technical Skills

API DevelopmentBackend DevelopmentJPAJavaKotlinRESTful APIs

ministryofjustice/cloud-platform-environments

May 2025 Jul 2025
2 Months active

Languages Used

HCLYAML

Technical Skills

Database ManagementInfrastructure as CodeKubernetesAWSCloud PlatformTerraform

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