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Michael Willis

PROFILE

Michael Willis

Over the past 13 months, this developer delivered robust backend and API solutions across ministryofjustice/hmpps-locations-inside-prison-api and related repositories, focusing on scalable location management, incident reporting, and secure data workflows. They refactored certification and deactivation flows, optimized certificate retrieval with recursive SQL, and streamlined approval processes to improve data integrity and performance. Leveraging Kotlin, Spring Boot, and TypeScript, they enhanced API payloads, reduced technical debt, and strengthened authentication with centralized token management. Their work included migrating incident lookups to a dedicated reporting API, improving UX, and expanding test coverage, resulting in more maintainable, auditable, and performant justice sector applications.

Overall Statistics

Feature vs Bugs

88%Features

Repository Contributions

241Total
Bugs
13
Commits
241
Features
97
Lines of code
422,335
Activity Months13

Work History

May 2026

17 Commits • 8 Features

May 1, 2026

May 2026 monthly summary for developer performance review focusing on business value and technical achievements across multiple repos. Highlighted features delivered, major bugs fixed, impact, and technologies demonstrated. Key features delivered: - API cleanup and deprecation removal in ministryofjustice/hmpps-locations-inside-prison-api (MAP-3192): fully removed deprecated Certification DTO and wrappers from API responses and sync handling, simplifying payloads and error surfaces. This reduced API surface area and improved maintainability; changes touched DTOs (LocationDto.kt, NomisSyncLocationRequest, etc.), with corresponding test payload restructuring. - Certificate handling improvements and deactivation/workflow enhancements (MAP-3196, MAP-3208, MAP-3195, MAP-3195 family): eliminated N+1 query when fetching certificates for inactive locations by introducing a batch fetch with a recursive CTE; implemented updates to allow deactivation updates for inactive locations and introduced an approval workflow for capacity-affecting specialist cell types; preserved unrelated state in new certificates to prevent drift. - Preserve unrelated locations on cell certificate approval (MAP-3205 reference): refactored certificate generation to clone non-participating locations from prior certificates; added helper logic to locate existing entries and preserve state. Strengthened test coverage to ensure stability during approvals. - Inactive status and short-term deactivation tracking: introduced permanently stored indicators for short-term deactivations (temporarilyOffCellCert) and corresponding DTO visibility; added domain model changes to support accurate inactive classification. - Security/Token Management Refactor: standardized systemToken usage for sensitive routes (notably prisoner photo requests) and updated tests to align with new token flow (IR-1635). - Incident Reporting API migration and UX improvements (ministryofjustice/offender-categorisation and minities): migrated incident lookup from prison-api to incident-reporting-api for more efficient, server-side filtering; added incident reporting client and service adjustments to reduce front-end payload processing and improve performance; UX improvements for incident reporting forms (IR-1647, IR-1648) and access control simplifications in the micro-frontend (IRS integration). Major bugs fixed: - MAP-3198: Fixed workingCapacityChange losing certificate value when deactivating a temporarilyOffCellCert cell by ensuring certificate-value corrections include the top-level location; updated integration tests to cover end-to-end scenario where certificate remains authoritative after deactivation approval. - N+1 query fix for inactive locations: batch retrieval of certificate locations reduced database work to a single recursive query, avoiding per-cell lookups and improving response times on estates with many deactivated cells. - Numerous test payload re-alignments: restructured test JSONs and helpers to match the new response shapes and domain events, ensuring stable regression coverage with the refactor. Overall impact and accomplishments: - Improved data integrity and performance across critical workflows dealing with location certificates, deactivations, and approvals. Reduced database load and improved end-user latency for scenarios involving large prisons with many inactive cells. - Strengthened security posture through centralized system token usage for sensitive Prison API calls and consistent token handling across services. - Accelerated incident data access by migrating incident lookups to incident-reporting-api and aligning front-end with server-side filtering. - Enhanced test coverage and migration safety with structured test changes, backfills, and domain event validation. Technologies and skills demonstrated: - Kotlin, JPA, SQL (including recursive CTEs), Flyway migrations, and test-driven development; extensive codebase refactoring with safe, test-backed changes. - TypeScript/Incident Reporting API client design, front-end integration, and Cypress-based end-to-end testing. - Security engineering: token-based authentication refactor and system-token orchestration across services. - Data governance: explicit inactive status modeling and approval workflow lifecycle improvements. Notes: - Several changes are interconnected through MAP-IDs and represent a strategic shift toward more robust, auditable, and scalable certification flows across the HMPS services. - The changes align with business goals of reducing latency, avoiding data drift during approvals, and strengthening security.

April 2026

20 Commits • 12 Features

Apr 1, 2026

April 2026 delivered significant data-product enhancements, incident reporting improvements, and substantial DPR-related cleanup across multiple repos. Key outcomes include more accurate and interactive data reporting, streamlined build processes, and reduced maintenance overhead, supporting faster decision-making and a leaner, more secure codebase.

March 2026

26 Commits • 11 Features

Mar 1, 2026

March 2026 monthly summary: Delivered significant cross-repo improvements across incident reporting, locations API, and data-product definitions, with a strong focus on business continuity, data integrity, and operational governance. The period included foundational API model enhancements, major workflow overhauls, comprehensive documentation, and relevant build/dependency updates that improve performance, maintainability, and onboarding. Notable bug fixes and stability gains complemented feature work, enabling more reliable reporting, search accuracy, and deployment readiness across environments.

February 2026

17 Commits • 4 Features

Feb 1, 2026

February 2026 focused on delivering high-impact features across HM Prison locations API and incident reporting, strengthening approval workflows, location management, and remote hearing capabilities, while stabilizing the codebase and improving data quality and performance.

January 2026

27 Commits • 8 Features

Jan 1, 2026

January 2026 performance highlights: Delivered cross‑repo improvements for incident reporting and location management that increase data integrity, operational reliability, and business throughput. Key outcomes include Business Continuity incident types with mandatory comment prompts, updated prisoner role descriptions and ordering, and standardized UI guidance and Yes/No question ordering. Expanded non-residential locations API with local-name search endpoints, activation/deactivation workflows, and parent/child status inheritance, backed by comprehensive tests and missing-child generation. Strengthened deactivation/certification workflows with reasonForChange tracking, new DTOs, and approvals, plus cell mark and sanitation update workflows. Integrated Incident Reporting service configuration across environments (UI URL) and updated LocationClient to use NonResidentialServiceType. These changes deliver faster, more accurate incident data capture, safer configuration changes, and improved developer productivity.

December 2025

12 Commits • 8 Features

Dec 1, 2025

December 2025: Delivered feature-rich enhancements across incident reporting and locations services, prioritizing data clarity, deterministic ordering, and deployment readiness. Notable outcomes include payload and role-configuration improvements for the Incident Reporting System; enhanced form guidance and data collection; removal of Certification to simplify capacity handling with refactored approval flows; deterministic data structures with SortedSet and optimized JPA entity graphs; new cell-details reporting and API access with enriched query capabilities; residential location cell condition tracking with history logging; expansion of private_prisons access and dependency upgrades; and migrating incident reports/cell location definitions to Athena Redshift for more robust data handling. These changes reduce data-entry errors, accelerate incident processing, and improve governance and auditability across the platforms.

November 2025

27 Commits • 11 Features

Nov 1, 2025

November 2025 monthly summary highlighting business value and technical achievements across multiple repositories. Focused on delivering core location management capabilities, strengthening data governance, and improving platform stability and search functionality. Key business outcomes include faster feature delivery for location management, safer and more auditable data, improved capacity planning, and scalable search capabilities for offender data. Frontend access control improvements (RBAC) complemented backend changes, improving security posture and regulatory compliance.

October 2025

23 Commits • 9 Features

Oct 1, 2025

October 2025: Delivered a set of security, access-control, and workflow improvements across four repositories, coupled with infrastructure and frontend modernization. The work prioritized business value and reliability, reducing manual steps, improving risk management, and enabling faster, more secure releases.

September 2025

18 Commits • 4 Features

Sep 1, 2025

September 2025 monthly summary focusing on key outcomes across three repositories. The work delivered substantial business value through architectural refactors, data integrity improvements, and enhanced cross-system data flows. Notable accomplishments include moving signed operation capacity to a dedicated entity with central validation and auditing, refining location management and NOMIS publishing workflows, and delivering targeted robustness enhancements across the codebase. Incident reporting gains more flexible agency data retrieval and formatting options for improved reporting, while prisoner-profile fixes restore correct filtering behavior. Overall, these efforts enable more accurate capacity planning, reliable location data publishing, and stronger cross-system reporting with improved system resilience.

August 2025

5 Commits • 3 Features

Aug 1, 2025

2025-08 monthly summary for ministryofjustice/hmpps-locations-inside-prison-api: Delivered performance improvements, data-model enhancements for capacity planning, and build/stability upgrades. Key outcomes include client-side caching for OAuth2 authorized client management to reduce backend calls and streamline client credentials handling; capacity accounting enhancements across location data and pending changes with a new workingCapacity field; explicit marking of Unfurnished as capacity-affecting; and updated tests and mocks to reflect expiry and capacity behavior. Also performed dependency upgrades to Gradle plugin and related libraries to improve security and runtime reliability. These changes enable faster, more accurate capacity planning and more stable deployments.

July 2025

26 Commits • 11 Features

Jul 1, 2025

July 2025 monthly summary: Delivered core platform enablement, security, and data-structure improvements across multiple repositories. Key outcomes include feature flag alignment, new prison splash screen, role-based access enhancements, secure secrets management and CI/CD modernization, and location data architecture enhancements. These changes underpin faster deployments, safer configurations, and more scalable location/prison data APIs, delivering business value with clearer governance and reduced risk.

June 2025

16 Commits • 4 Features

Jun 1, 2025

June 2025: Achieved major workflow enhancements for location and cell certificate management, expanded environment/config standardization, and completed build/tooling upgrades. Delivered a robust certification workflow with hierarchical location support, pending changes handling, and capacity-aware validations; implemented locked-location protection and updatedBy propagation for deactivation/transformations; standardized environment variable keys and startup behavior; introduced a global feature flag FLAG_CREATE_AND_CERTIFY to control cross-environment rollout; upgraded dependencies and Gradle plugins to address security and compatibility.

May 2025

7 Commits • 4 Features

May 1, 2025

May 2025 summary focusing on delivering business value through end-to-end improvements in location certification, capacity modeling, and secure, maintainable dependencies, while maintaining UI accuracy and queue reliability across repositories.

Activity

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Quality Metrics

Correctness92.0%
Maintainability87.0%
Architecture87.0%
Performance84.4%
AI Usage23.2%

Skills & Technologies

Programming Languages

DockerfileGradleHTMLJSONJavaJavaScriptKotlinMarkdownNunjucksPLpgSQL

Technical Skills

API DevelopmentAPI IntegrationAPI developmentAPI integrationAWS SNSAWS SQSAnnotation ProcessingBackend DevelopmentBuild AutomationBuild ConfigurationBuild ManagementCI/CDCachingCode MaintenanceCode Refactoring

Repositories Contributed To

9 repos

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

ministryofjustice/hmpps-locations-inside-prison-api

May 2025 May 2026
13 Months active

Languages Used

GradleJavaKotlinSQLYAMLMarkdownPLpgSQLProperties

Technical Skills

API DevelopmentBackend DevelopmentBuild ConfigurationConfiguration ManagementDatabase DesignDatabase Management

ministryofjustice/hmpps-incident-reporting

May 2025 May 2026
11 Months active

Languages Used

TypeScriptYAMLJavaScriptNunjucksJSONHTMLMarkdownSCSS

Technical Skills

Frontend DevelopmentConfiguration ManagementDevOpsAPI IntegrationBackend DevelopmentRefactoring

ministryofjustice/hmpps-locations-inside-prison

May 2025 Apr 2026
8 Months active

Languages Used

TypeScriptMarkdownYAMLDockerfileJavaScriptNunjucksPropertiesSCSS

Technical Skills

Backend DevelopmentDependency ManagementNode.jsConfiguration ManagementDevOpsDocumentation

ministryofjustice/hmpps-dpr-data-product-definitions

Dec 2025 Apr 2026
3 Months active

Languages Used

JSON

Technical Skills

JSON schema designdata modelingdatabase managementreportingJSON manipulationdata analysis

ministryofjustice/hmpps-micro-frontend-components

Oct 2025 May 2026
3 Months active

Languages Used

TypeScript

Technical Skills

Backend DevelopmentTypeScriptbackend developmentrole-based access controlNode.jsfull stack development

ministryofjustice/hmpps-prisoner-profile

Jul 2025 Jan 2026
3 Months active

Languages Used

TypeScriptYAML

Technical Skills

API IntegrationBackend DevelopmentRefactoringTypeScriptback end developmentconfiguration management

ministryofjustice/hmpps-non-associations

Jul 2025 May 2026
2 Months active

Languages Used

YAMLTypeScript

Technical Skills

Configuration ManagementDevOpsAPI integrationbackend developmenttesting

ministryofjustice/use-of-force

Jan 2026 Jan 2026
1 Month active

Languages Used

JavaScriptTypeScript

Technical Skills

API DevelopmentJavaScriptTestingTypeScript

ministryofjustice/offender-categorisation

May 2026 May 2026
1 Month active

Languages Used

TypeScript

Technical Skills

API integrationTypeScriptfull stack development