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Lance Munslow

PROFILE

Lance Munslow

Over 19 months, contributed to the ministryofjustice/hmpps-activities-management-api and related repositories by building scalable backend systems for prison activities management. Delivered robust API development and integration using Kotlin, Java, and Spring Boot, focusing on asynchronous processing, SQS-based background jobs, and resilient data pipelines. Enhanced reliability through CI/CD modernization with GitHub Actions, Docker, and Gradle, while improving data integrity with database migrations and validation logic. Implemented feature toggles, audit logging, and observability to support safe rollouts and operational transparency. The work enabled flexible scheduling, secure configuration management, and streamlined workflows, supporting both business requirements and technical maintainability at scale.

Overall Statistics

Feature vs Bugs

76%Features

Repository Contributions

383Total
Bugs
52
Commits
383
Features
165
Lines of code
170,009
Activity Months19

Work History

April 2026

11 Commits • 8 Features

Apr 1, 2026

April 2026 monthly summary for development work across multiple services, focusing on stabilizing CI pipelines, strengthening data integrity, improving test reliability, and simplifying APIs while enabling critical Forest Bank workflows. The work delivered business value by reducing risk from upstream changes, ensuring accurate attendance data for compliance, increasing test confidence, and enabling flexible scheduling and API contracts across repositories.

March 2026

4 Commits • 4 Features

Mar 1, 2026

March 2026: Key API enhancements and CI/CD reliability improvements across two repos. Delivered flexible data retrieval for allocations with a new optional parameter to include scheduled instances (Allocation Dashboard Activity Retrieval API), along with test reliability gains from fixing stubs and removing unused mocks. Strengthened CI/CD stability by pinning GitHub Actions SHAs, removing unused workflows, and annotating third-party action versions. Enhanced API documentation with Swagger UI (OpenAPI Docs) including tests for availability and correctness and established security schemes. Overall impact: improved data accessibility for operations teams, safer deployments, faster release cycles, clearer documentation, and stronger security posture.

February 2026

24 Commits • 13 Features

Feb 1, 2026

February 2026 highlights: Delivered high-value features, stabilized deployments, and progressed major business outcomes across HMPS repositories. Focus areas included configurable CI/CD workflows, runtime standardization, and accelerated Feltham A rollout, with multiple API and endpoint enhancements to support smarter location handling and better search capabilities.

January 2026

6 Commits • 4 Features

Jan 1, 2026

January 2026 (2026-01) — Key outcomes: 1) Appointment Category Reorganization to improve categorization and retrieval with updated SQL migrations; 2) System Performance and Observability Enhancements with JVM heap increases (prod/preprod 1300MB, later 2GB prod), memory limit adjustments, and Docker image upgrade to enable head dumps; 3) Authentication Timeout Default introduced (2s) to improve reliability and responsiveness; 4) Prisoner Waiting List Reallocation enabling deallocated prisoners to be re-added as future allocations with updated logic and tests. Impact: faster category lookups, more reliable authentication, and easier debugging; improved observability and resilience across environments. Technologies demonstrated: Java/JVM tuning, SQL migrations, Docker/JDK upgrades, observability/configuration optimization, and test-driven improvements.

December 2025

2 Commits • 1 Features

Dec 1, 2025

December 2025 monthly summary focusing on business value and technical achievements across two repositories. Key work centered on configurable CI/CD workflows and reliability improvements in payments processing, enabling safer deployments and more predictable operations.

November 2025

36 Commits • 14 Features

Nov 1, 2025

November 2025: Delivered major platform enhancements across HMPS services with a focus on reliability, compliance, and business value. Implemented SQS-based messaging for appointment attendees, activated and promoted Styal, Chelmsford, and Birmingham to Go Live, and executed targeted cleanup and deprecation work to simplify code paths. Enforced regulatory compliance by disabling Whereabouts for Styal, Chelmsford, and Birmingham, and modernized API surfaces with prisoner scheduling endpoint refactors and endpoint realignment. Strengthened stability, security, and developer velocity through a flaky test fix, App Insights sampling, plus security and CI improvements.

October 2025

24 Commits • 11 Features

Oct 1, 2025

October 2025 performance summary: Delivered critical backend modernization and reliability improvements across HM Prison & Probation Service platforms, with a focus on scalable background processing, live-location enablement, and robust CI/CD/security. Key business outcomes include asynchronous allocation workflows reducing processing delays, expanded live-location coverage for prisons, improved data validation and UX for waiting lists, and strengthened testing/integration pipelines. Cross-repo changes supported feature toggles and UI access controls, while documentation keep dependencies transparent. These efforts collectively increase throughput, operational visibility, and time-to-value for product teams and end users.

September 2025

34 Commits • 11 Features

Sep 1, 2025

September 2025 performance summary focusing on delivering business value through stability, scale, and modernization across core platforms. Key outcomes include a memory management fix for ended jobs, a multi-location rollout of Activities and Appointments, a shift to modern CI/CD pipelines, enhanced observability and alerting, and location-specific feature toggles for Whereabouts UI. The month also solidified data persistence patterns with Redis-backed journey data and improved integration testing and release hygiene.

August 2025

17 Commits • 7 Features

Aug 1, 2025

August 2025 performance summary for HMPS projects focused on delivering scalable scheduling and allocation capabilities, strengthening data integrity, and improving development and deployment efficiency across multiple repositories. The month saw the rollout of SQS-based distributed processing for creating schedule instances and ending allocations, alongside production enablement and robust testing including Dead Letter Queue handling. Data integrity improvements fixed prisoner status logging and ensured allocation endDates are correctly updated for planned deallocations. Eastwood go-live readiness was achieved through prison configuration updates and targeted feature toggles for Eastwood Park. Build/CI and Docker optimizations were implemented to align with Gradle 9, accelerate startup, and simplify image layering. API evolution and cleanup reduced technical debt by deprecating internalLocationId, removing unnecessary endpoints, and consolidating lifecycle changes (including removal of deprecated jobs and permanent removal of the Uncancel Multiple Sessions feature toggle).

July 2025

20 Commits • 9 Features

Jul 1, 2025

July 2025 performance summary highlighting business value and technical achievements across HMPS services, with a focus on interoperability, regional enablement, and reliability.

June 2025

37 Commits • 14 Features

Jun 1, 2025

June 2025: Delivered multiple production go-lives and data integrity enhancements across HMPS platforms, enabling new sites and improving scheduling reliability. Key outcomes include live deployments for Manchester, Lincoln, Swansea, Stocken, and Stoke Heath; activation of activities and appointments for Manchester, Stoke Heath, Lincoln, and Swansea; added DPS location UUIDs to appointments and appointment sets with a dedicated fix job; implemented targeted UI gating to reduce exposure in non-production environments; and foundational changes to scheduling models and CI/CD that improve flexibility, reliability, and faster iteration.

May 2025

19 Commits • 8 Features

May 1, 2025

Concise monthly summary for 2025-05 focusing on key business value delivered through feature enablement, bug fixes, and foundational reliability across the HMPS activities management stack. Highlights include Go-Live for Woodhill and Whatton with Activities & Appointments, enhanced attendance and cancellation logic, a new Advance Attendances API with history logging for payments, targeted data filtering to improve move lists, and security/reliability hardening.

April 2025

32 Commits • 17 Features

Apr 1, 2025

Concise monthly summary for April 2025 highlighting key features, critical fixes, impact, and technologies demonstrated across repositories. Emphasizes business value, reliability, and performance improvements with concrete delivery details.

March 2025

32 Commits • 12 Features

Mar 1, 2025

March 2025 highlights: Delivered end-to-end enhancements across the HM Prison Activities Management stack, delivering measurable business value in scheduling accuracy, data integrity, and system resilience. Key features include Attendance System Enhancements with mass attendance links and improved attendee search; DPS Location UUID migration with dpsLocationId, plus location handling improvements; Movement List architecture shift to Redis-backed session storage; DPR frontend updates and a regression fix; LCI data integration and related API endpoints; bulk cancellation of scheduled activities; retry mechanisms for external API calls; environment parity across PREPROD/PROD; activation of ISI/BRI; HMP Leicester UI disablements; and improvements to data quality by reporting invalid locations.

February 2025

24 Commits • 7 Features

Feb 1, 2025

February 2025 monthly summary for the HMPS Activities Management portfolio. Delivered user-focused appointment features, strengthened data integrity across scheduling and migrations, expanded location data integration, and improved reporting, while enhancing CI/CD reliability and code quality across two repos. Business value was realized through more accurate data, better UX, and faster, more reliable releases.

January 2025

14 Commits • 5 Features

Jan 1, 2025

January 2025 performance summary for HM Prison Activities Management and API: Key features delivered - Appointment Attendance Management Improvements: UI and data-flow enhancements for viewing/editing attendance, including search, location filtering, clashes column, and improved user feedback; fixes to attendance links and UI consistency across the attendance view. - Multi-Appointment Attendance: Enables recording attendance across multiple appointments with a rollout toggle, alignment of validation and UI to multi-appointment use cases, deployment/config changes, and end-to-end Cypress tests. - Performance improvements for reporting and data export: Refactored reporting/data export to streaming processing, memory-efficient CSV conversion, and streaming exports to S3 for large datasets. Major bugs fixed - Production Live Config Cleanup: Removed erroneous prison codes from ACTIVITES_LIVE and APPOINTMENTS_LIVE in production Helm values to stabilize live configurations. - UI/workflow fixes in attendance: resolved issues around record attendance link, and UI glitches in mark attendance flows to ensure reliable data entry. Overall impact and accomplishments - Delivered scalable attendance workflows (including multi-appointment scenarios) with improved data accuracy, searchability, and feedback for end users; reduced operational risk through safer production config and improved data pipelines. - Strengthened release reliability with rollout toggles and automated tests; enhanced platform performance and memory efficiency for large reporting tasks. - Enabled downstream notifications for status changes via feature flags in API layer, improving operational awareness. Technologies/skills demonstrated - Frontend UX improvements, data-flow design, and feature flag-driven rollout strategies - End-to-end testing with Cypress for multi-appointment scenarios - Streaming data processing and memory optimization for reporting/export workflows - Build system hardening (environment asset separation, env vars handling) and enhanced CI/CD readiness - Helm-based production config management and safe production changes

December 2024

19 Commits • 6 Features

Dec 1, 2024

December 2024: Reliability, data integrity, and API scalability improvements across two repositories (hmpps-activities-management-api and hmpps-activities-management). Delivered resilience for Prison API, batch appointment endpoints and multi-appointment attendance management, and attendance/status enhancements, with targeted data accuracy fixes to improve reporting fidelity. Key features delivered include Prison API resilience improvements (retry mechanism and shorter timeout), appointment data API enhancements (batch get for multiple appointments and bulk attendance updates), multi-appointment attendance management (feature toggle, new endpoints, and UI/navigation refinements), and batch enabling of new prisons in preproduction. Major bugs fixed include activity data accuracy improvements (location filtering to include only actual visits and corrected v_activity_summary counts) and proper labeling of events in Changes in Circumstances (cell moves and related updates). These changes collectively improve system reliability, reporting accuracy, and operational efficiency, enabling safer production deployments and scalable batch operations. Technologies/skills demonstrated include retry patterns and timeout tuning, feature toggles, batch API design, data quality assurance, UI integration, and test infrastructure improvements.

November 2024

22 Commits • 10 Features

Nov 1, 2024

November 2024: Focused on reducing technical debt, enabling faster feature delivery, and strengthening test and security foundations across the HMPS Activities Management suite. Delivered production-ready feature flags, modernized API clients, improved data quality, and robust CI/testing with LocalStack and security scanning to lower risk and shorten feedback cycles.

October 2024

6 Commits • 4 Features

Oct 1, 2024

October 2024 performance highlights across two repositories. Delivered features and fixes that improve data accessibility, data quality, and reliability, while strengthening testing and release practices. Summary focuses on business value delivered to downstream services, operators, and end users.

Activity

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Quality Metrics

Correctness94.0%
Maintainability92.4%
Architecture90.8%
Performance89.6%
AI Usage20.8%

Skills & Technologies

Programming Languages

BashCSSDockerfileGradleHTMLJSONJavaJavaScriptKotlinMarkdown

Technical Skills

API ConfigurationAPI DesignAPI DevelopmentAPI IntegrationAPI TestingAPI developmentAPI integrationAWSAWS S3AWS SNSAWS SQSAsynchronous ProcessingAsynchronous ProgrammingAudit LoggingBack End Development

Repositories Contributed To

7 repos

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

ministryofjustice/hmpps-activities-management-api

Oct 2024 Apr 2026
18 Months active

Languages Used

KotlinYAMLDockerfileGradleJavaSQLyamlBash

Technical Skills

API ConfigurationAPI DevelopmentBackend DevelopmentCI/CDConfiguration ManagementDevOps

ministryofjustice/hmpps-activities-management

Oct 2024 Apr 2026
16 Months active

Languages Used

JavaScriptTypeScriptNunjucksYAMLJavaMarkdownBashJSON

Technical Skills

API DevelopmentBackend DevelopmentNode.jsTestingAPI IntegrationConfiguration Management

ministryofjustice/digital-prison-services

Mar 2025 Apr 2026
11 Months active

Languages Used

YAMLMarkdownyaml

Technical Skills

Configuration ManagementDevOpsDocumentationCI/CDDockerTesting

ministryofjustice/whereabouts-api

Mar 2025 Apr 2026
11 Months active

Languages Used

YAMLJavayaml

Technical Skills

Configuration ManagementDevOpsBackend DevelopmentDatabase ManagementSecurityKubernetes

ministryofjustice/prison-api

Nov 2024 Jun 2025
2 Months active

Languages Used

GradleKotlinSQLJava

Technical Skills

API DevelopmentBackend DevelopmentData ModelingDatabase ManagementUnit TestingJava

ministryofjustice/hmpps-github-actions

Dec 2025 Feb 2026
2 Months active

Languages Used

YAML

Technical Skills

CI/CDDevOpsGitHub Actions

ministryofjustice/hmpps-integration-api

Nov 2025 Nov 2025
1 Month active

Languages Used

Kotlin

Technical Skills

API DevelopmentBackend DevelopmentKotlin