
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.
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.
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 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.
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 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.
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 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.
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.
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.
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 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.
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: 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.
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: 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.
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 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.
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 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.
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 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.
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 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.
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 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.
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 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.
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 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.
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 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.
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.

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