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Luke Harper

PROFILE

Luke Harper

Luke Harper engineered robust release-date calculation and recall management features across the ministryofjustice/calculate-release-dates-api repository, focusing on data integrity, configurability, and workflow resilience. He refactored core data models for prisoner bookings, streamlined validation logic, and introduced configurable recall types with environment toggles. Leveraging Kotlin, Java, and Spring Boot, Luke enhanced remand period calculations, enabled secure per-user authentication, and improved bulk processing with AWS SQS integration. His work included infrastructure automation in cloud-platform-environments using Kubernetes and Terraform, supporting automated data refresh and ingestion pipelines. The depth of his contributions ensured maintainable code, reliable deployments, and improved compliance for justice workflows.

Overall Statistics

Feature vs Bugs

66%Features

Repository Contributions

274Total
Bugs
50
Commits
274
Features
95
Lines of code
272,459
Activity Months16

Work History

February 2026

9 Commits • 3 Features

Feb 1, 2026

February 2026: Delivered targeted improvements across three flagship MOJ services, focusing on data integrity, recall accuracy, and secure access. This period concentrated on refactoring core data models, strengthening validation, and enabling user-centric workflows to reduce risk and maintenance effort while increasing trust in decision-making data.

January 2026

6 Commits • 4 Features

Jan 1, 2026

January 2026 focused on strengthening release-date accuracy, feature configurability, and remand period efficiency across two services. Delivered configurable recall types with environment toggles and added robust tests, improved remand release date calculations via unused deductions, and expanded remand period capabilities to share unused deductions. Fixed a bug that could create empty remand periods and updated court-date event handling to support sentence deferrals and civil sentences. Enhanced testing with Testcontainers upgrades and data model refinements to support new scenarios. These efforts improved reliability, rollout safety, and business value for case management and compliance.

December 2025

3 Commits • 2 Features

Dec 1, 2025

December 2025 performance summary focused on two key initiatives across the ministryofjustice repositories: (1) recall adjustment editing in calculate-release-dates-api, enabling conflict-free edits with a recall ID in the request model, and (2) development environment setup for Court Data Ingestion API in cloud-platform-environments, establishing Kubernetes resources, IAM roles, SQS queues, and SNS-based domain events integration. These contributions deliver safer editing workflows, improved data integrity, and faster development/deployment readiness for ingestion services.

November 2025

8 Commits • 2 Features

Nov 1, 2025

November 2025 summary for developer teams across calculate-release-dates-api and prison-api. Delivered key improvements to recall decision accuracy, release-date reliability, API flexibility, and transfer data contracts. Highlights include removing deprecated endpoints, fixing sentence de-duplication and post-tranche adjustments with tests, and improving API documentation for nullable fields. Also made transfer process data more client-friendly by making toPrisonId optional, aligning with updated process docs.

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

Correctness86.0%
Maintainability85.8%
Architecture83.0%
Performance76.8%
AI Usage20.8%

Skills & Technologies

Programming Languages

CSVDockerfileGradleHCLHTMLJSONJavaJavaScriptKotlinNunjucks

Technical Skills

API ConfigurationAPI DesignAPI DevelopmentAPI IntegrationAPI designAPI developmentAPI integrationAWSAWS SQSAnalytics IntegrationAsynchronous ProcessingAuthenticationAuthorizationAzure Application InsightsBack End Development

Repositories Contributed To

7 repos

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

ministryofjustice/calculate-release-dates-api

Nov 2024 Feb 2026
15 Months active

Languages Used

CSVJavaKotlinYAMLSQLGradleJSON

Technical Skills

API DevelopmentBackend DevelopmentCode CleanupData AnonymizationData ModelingIntegration Testing

ministryofjustice/hmpps-identify-remand-periods-api

Nov 2024 Jan 2026
10 Months active

Languages Used

YAMLCSVKotlinGradleJavaSQLyamlJSON

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 Feb 2026
7 Months active

Languages Used

JavaScriptNunjucksTypeScripttypescriptyaml

Technical Skills

API DevelopmentAPI IntegrationBackend DevelopmentConfiguration ManagementFrontend DevelopmentJavaScript

ministryofjustice/calculate-release-dates

Jan 2025 Feb 2026
8 Months active

Languages Used

JavaScriptNunjucksTypeScriptYAMLyaml

Technical Skills

API DevelopmentAPI IntegrationBack End DevelopmentBackend DevelopmentBackend developmentConfiguration Management

ministryofjustice/prison-api

Dec 2024 Nov 2025
6 Months active

Languages Used

JavaKotlinSQL

Technical Skills

API DevelopmentBackend DevelopmentJPAJavaKotlinRESTful APIs

ministryofjustice/cloud-platform-environments

May 2025 Dec 2025
3 Months active

Languages Used

HCLYAMLTerraform

Technical Skills

Database ManagementInfrastructure as CodeKubernetesAWSCloud PlatformTerraform