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Michael Harrison

PROFILE

Michael Harrison

Michael Harrison developed and maintained core features for NHSDigital/nhs-notify-web-template-management, focusing on secure authentication, infrastructure automation, and content delivery. He implemented OAuth2 and AWS Cognito-based login flows, integrated virus scanning with AWS GuardDuty, and streamlined template management using DynamoDB, S3, and CloudFront. Michael used TypeScript and Terraform to automate infrastructure, enforce CI/CD quality gates, and manage event schema versioning. His work included contract testing, real-time data streaming with AWS Pipes, and frontend modernization with React and Next.js. These efforts improved deployment reliability, security posture, and user experience, demonstrating depth in backend, DevOps, and frontend engineering practices.

Overall Statistics

Feature vs Bugs

75%Features

Repository Contributions

149Total
Bugs
17
Commits
149
Features
51
Lines of code
146,988
Activity Months12

Work History

October 2025

8 Commits • 4 Features

Oct 1, 2025

In October 2025, delivered foundational enhancements for routing, messaging, and font security across NHSDigital projects, enabling safer feature rollout, stronger security posture, and improved user experience. Key outcomes include API-enabled routing configuration management behind a feature flag, an end-to-end message plan creation workflow integrated with routing, and strengthened font asset handling with CSP/CORS improvements and self-hosted assets across web-template-management and IAM webauth.

September 2025

2 Commits • 2 Features

Sep 1, 2025

Month: 2025-09 — Delivered infrastructure reliability improvements and testing enhancements for nhs-notify-web-template-management. Key efforts included upgrading Lambda modules across Terraform and introducing provider-side contract tests with CI integration, aligned with business objectives to improve deployment stability and contract compliance.

August 2025

2 Commits • 1 Features

Aug 1, 2025

August 2025: Security and release automation enhancements across two NHSDigital repositories. Implemented a WAF ACL improvement to correctly recognize and secure the template upload path, and introduced automated event schema versioning and CI validation to enforce schema regeneration and proper version increments, strengthening release integrity and downstream compatibility.

July 2025

2 Commits • 2 Features

Jul 1, 2025

July 2025 monthly summary focusing on key accomplishments and business value across two repositories. Delivered features to streamline testing workflows and enhance content rendering fidelity, contributing to faster release cycles and more reliable user-facing notifications. No critical bugs reported this month; existing workflows remained stable and improved alignment with GOV.UK Notify standards.

June 2025

4 Commits • 4 Features

Jun 1, 2025

In June 2025, delivered four key capabilities across two repositories, strengthening developer experience, real-time data processing, email deliverability, and authentication security. Stabilized development tooling, enabled real-time DynamoDB template processing, and completed Terraform-based SES configuration for custom domains, alongside enhanced Cognito tokens for client-specific authorization.

May 2025

2 Commits • 2 Features

May 1, 2025

Monthly summary for May 2025 focusing on feature delivery and performance improvements across two repositories. Delivered simplifications to template options and enhanced static asset delivery via a CDN origin, with corresponding test updates to ensure quality and maintainability.

April 2025

4 Commits • 3 Features

Apr 1, 2025

April 2025 monthly summary for NHSDigital development efforts. Delivered security and governance enhancements across two repositories, focusing on business value, reliability, and maintainability. Key features delivered: - Virus scanning and file validation for letter templates in nhs-notify-web-template-management, integrating AWS GuardDuty malware protection. Backend processes scan results to update template statuses and manage files; CI/CD pipelines updated to include accessibility and end-to-end tests; frontend displays a 'Virus Scan Failed' status when issues are detected. Commits CCM-8572 and CCM-8574. - CODEOWNERS update to reflect shift in test ownership in nhs-notify-web-template-management (/docs/testing/ and /tests/test-team/). Commit CCM-9344. - CODEOWNERS update to reflect shift in test ownership in nhs-notify-iam-webauth. Commit CCM-9344. Major bugs fixed / governance improvements: - Resolved ownership drift by updating CODEOWNERS to reflect current responsibilities, reducing maintenance friction and review bottlenecks. - Improved template security visibility by introducing explicit frontend status for virus scan failures and ensuring backend status propagation. Overall impact and accomplishments: - Strengthened security posture for template content and reduced risk of malicious files entering production. - Clarified code ownership across repositories, accelerating code reviews and onboarding of new contributors. - Improved release confidence through extended CI/CD tests (accessibility and end-to-end) and visible UI indicators for security issues. Technologies and skills demonstrated: - AWS GuardDuty integration, backend scan result processing, and file lifecycle management. - Frontend state handling for security status indicators. - CI/CD test automation including accessibility and end-to-end coverage. - Code ownership governance and repo hygiene through CODEOWNERS management.

March 2025

7 Commits • 5 Features

Mar 1, 2025

March 2025 monthly summary highlighting security hardening, authentication improvements, and backend security enhancements across two NHSDigital repos. The work delivered strengthens data protection, enables robust deployment workflows, and improves user session management, delivering measurable business value in security posture, reliability, and developer efficiency.

February 2025

33 Commits • 10 Features

Feb 1, 2025

February 2025: Delivered major authentication and frontend modernization across NHSDigital/nhs-notify-iam-webauth and NHSDigital/nhs-notify-web-template-management. Implemented OAuth2-based login flow with Amplify listener, enhanced the user authentication UI, stabilized redirects and sign-out/navigation, refreshed branding and dependencies to align with 9.1.0, and advanced SEO/metadata handling. Strengthened quality with updated tests, lint/tfsec fixes, and code quality improvements by excluding layout from SonarQube metrics.

January 2025

26 Commits • 6 Features

Jan 1, 2025

January 2025 monthly summary for NHSDigital/nhs-notify-web-template-management. Focused on delivering user-facing navigation improvements, expanding test automation, and strengthening CI/CD quality gates to reduce risk and accelerate delivery.

December 2024

12 Commits • 2 Features

Dec 1, 2024

December 2024 (NHSDigital/nhs-notify-web-template-management) delivered a robust frontend authentication flow with AWS Amplify, stabilized redirects, and stronger code quality to accelerate secure access, onboarding, and release reliability. The work focused on feature delivery for user authentication, targeted bug fixes, and extensive maintenance to reduce technical debt and improve build/test stability.

November 2024

47 Commits • 10 Features

Nov 1, 2024

November 2024 performance summary for NHSDigital/nhs-notify-web-template-management. Delivered structural, automation, and workflow improvements that elevate build reliability, deployment speed, and maintainability of the Notify web template management workflow.

Activity

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Quality Metrics

Correctness89.4%
Maintainability88.8%
Architecture85.2%
Performance82.6%
AI Usage21.0%

Skills & Technologies

Programming Languages

BashCSSHCLHTMLJSONJavaScriptMarkdownPropertiesPythonSCSS

Technical Skills

API DevelopmentAPI GatewayAPI TestingAWSAWS AmplifyAWS CLIAWS CognitoAWS IAMAWS LambdaAWS SSMAWS WAFAuthenticationAuthorizationBackend DevelopmentBash Scripting

Repositories Contributed To

4 repos

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

NHSDigital/nhs-notify-web-template-management

Nov 2024 Oct 2025
12 Months active

Languages Used

BashHCLJSONJavaScriptMarkdownPythonSQLShell

Technical Skills

API GatewayAWSAWS CognitoAWS LambdaAuthorizationBackend Development

NHSDigital/nhs-notify-iam-webauth

Feb 2025 Oct 2025
5 Months active

Languages Used

CSSHCLJavaScriptPropertiesSCSSTerraformTypeScripttsx

Technical Skills

API GatewayAWSAWS AmplifyAWS CognitoCI/CDCSS

NHSDigital/nhs-notify-web-gateway

May 2025 Aug 2025
2 Months active

Languages Used

JavaScriptTerraformHCL

Technical Skills

AWS LambdaCDN ConfigurationCloudFrontJavaScriptTerraformAWS WAF

NHSDigital/nhs-notify-system-tests

Jul 2025 Jul 2025
1 Month active

Languages Used

BashJSONYAML

Technical Skills

AWS CLICI/CDGitHub ActionsShell Scripting

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