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mmodzelewski-ch

PROFILE

Mmodzelewski-ch

Michał Modzelewski delivered robust user management and digital authorisation features across the companieshouse/acsp-manage-users-web and your-companies-web repositories, focusing on maintainable architecture and secure workflows. He overhauled frontend templates, modernized navigation middleware, and introduced identity verification extensions, using TypeScript, Node.js, and Nunjucks templating. Michał implemented security hardening with Content Security Policy and helmet, improved session and error handling, and streamlined API integration for company associations. His work included comprehensive test coverage, localization, and accessibility improvements, resulting in cleaner codebases and reduced operational risk. These contributions enabled faster feature delivery, improved compliance, and more reliable onboarding and authentication experiences for end users.

Overall Statistics

Feature vs Bugs

71%Features

Repository Contributions

348Total
Bugs
42
Commits
348
Features
104
Lines of code
64,981
Activity Months13

Work History

October 2025

26 Commits • 10 Features

Oct 1, 2025

October 2025 monthly summary focusing on key accomplishments and business impact across CH web apps. Key features delivered and improvements: - acsp-manage-users-web: Frontend UI Refresh and Templating Overhaul — overhauled templates, updated layouts and styles, removed outdated handlers and partial templates, resulting in a more consistent, reliable user interface and correct rendering of main content. (SIV-526 commits across UI/template updates) - acsp-manage-users-web: Security Hardening — tightened Content Security Policy and added helmet protections (no-sniff, cache-control) to reduce risk of content-based attacks and caching of sensitive data. - acsp-manage-users-web: Identity Verification Extension — enabled updating identity verification details for another person with a new dashboard option, expanding admin/user capabilities for verification workflows. - acsp-manage-users-web: Deployment/Tooling Modernization — improved Docker build/run behavior, preserved package.json, updated ESLint, removed unused dependencies, and general build/tooling cleanup to boost reliability. - acsp-manage-users-web: Search Parameter Management — introduced a dedicated search parameter, ensured session data cleanliness by clearing search phrases when not required, and preserved clean redirects for navigation. Major improvements in other repos (context): - your-companies-web: improved debugging with extended logging in navigation middleware; refined tests and controller-level session flag handling for clarity. - ch.gov.uk: Identity verification UI enhancements with feature flag for idv details and expiration status; bug fix to supervisory bodies string generation when data is absent. Overall impact and business value: - Stronger security posture with CSP/helmet, reducing risk exposure. - More consistent and intuitive UI across user management tooling leading to higher user satisfaction and lower support overhead. - Expanded identity verification capabilities improve compliance workflows and admin efficiency. - Improved deployment reliability and code quality reduce time-to-production and environment-related incidents. - Cleaner navigation and session handling reduce user friction and bug chatter in production. Technologies/skills demonstrated: - Web security hardening (Content Security Policy, Helmet), containerized deployments (Docker), modern JS tooling (ESLint), and build tooling (Makefiles/CI integration). - Feature flag usage for UI/Viz controls and data-driven UI updates. - Improved observability through enhanced logging and targeted controller-level session management.

September 2025

22 Commits • 7 Features

Sep 1, 2025

September 2025 performance highlights: Delivered UX improvements, data fidelity, and UI modernization across four repositories, with a strong focus on business value. Key outcomes include simplified authentication flow, robust identity verification data transformation, UI/ACSP enhancements, and front-end modernization enabling faster builds and easier maintenance.

August 2025

34 Commits • 6 Features

Aug 1, 2025

Month: 2025-08 Overview: A focused delivery month across three repos, delivering maintainable code improvements, data model enhancements, localization-driven refinements, and robust error handling. The work reduced technical debt, improved test coverage, and strengthened readiness for upcoming releases while accelerating business value through cleaner APIs, better UI consistency, and clearer data contracts. Key features delivered: - your-companies-web (companieshouse/your-companies-web): • SIV-481 Code Cleanup and Refactoring: remove deprecated code, unused imports, cleanup session data and language entries, update navigation tests, refactor tests, and improve coverage. Representative commits include 5ce78e..., 98e5f4..., a944a9..., 97ff38..., 855da2..., 3bfa744..., 50bcf20..., 7d57ba7..., 078925c... • SIV-481 Titles Management: add/remove titles as part of cleanup/feature work (commits: 81ab3cf4..., b5d87f87...) • SIV-497 Summary Card and Localization Cleanup: add company status to the summary card; alphabetically sort language files (commits: 05bf6538..., 8b8a9f7c...) • SIV-543 UI Styles Fix and SIV-543 Styles Updated: ensure crown logo visibility and apply project-wide UI style updates (commits: 5363aa7e..., ae512115...) • SIV-482 Templates, Handler, and Localization: update templates/handler for unauthorised status and localize label in success banner (commits: 5b89042f..., fd469017...) • Minor accessibility/quality tweaks: duplicated email removal in visually hidden text; language entries cleanup (SIV-550, SIV-559, SIV-566, SIV-575, SIV-579 across related work) as part ongoing quality drive. - acsp-manage-users-web (companieshouse/acsp-manage-users-web): • SIV-507 Code Quality Improvement: Refactor getViewData and handleSearch to use an AcspData interface, reducing parameter count and improving maintainability (commit: 42aca421...) - psc-data-api (companieshouse/psc-data-api): • SIV-637 PSC Identity Verification Details data model and testing: add identity_verification_details to PscData, introduce PscIdentityVerificationDetails, and update tests (commits: d7fa77f5..., 6ffb6367..., a38fca94...) • SIV-637 Apache Commons Lang compatibility fix: revert upgrade to maintain stability (commits: 24eea082..., 2c5f81a4...) Major bugs fixed: - SIV-549 Error Handling Enhancement: propagate HTTP status into catch clauses for precise error handling. - SIV-543 UI Styles Fix: restore crown logo visibility and refine styling across the UI (plus related SIV-543 style updates). - SIV-482 Templates and Handler: ensure proper behavior with unauthorized associations and localized success banner label. - SIV-566 Middleware and Controller cleanup: remove legacy create company controller and apply correct middleware. - SIV-575 Macros to create links and hrefs fixed. - SIV-579 Digital authorisation status handling: update valid statuses and add missing unauthorised status; remove unused import. Overall impact and accomplishments: - Improved code maintainability and reduce technical debt across three repos, enabling faster future changes and safer releases. - Strengthened data contracts and localization maintainability with explicit interfaces and alphabetical language file organization. - Enhanced reliability and resilience through robust error handling and middleware cleanups, contributing to fewer runtime surprises in production. - Expanded unit and integration test coverage to accompany refactors and new data models, boosting release confidence. Technologies, skills demonstrated: - TypeScript/JavaScript modern practices, interface-driven design (AcspData, identity_verification_details). - Refactoring and test-driven improvements with sustained test coverage growth. - Localization management and UI styling discipline across multiple repos. - Error handling patterns and middleware architecture improvements. - Dependency management and stability fixes (Apache Commons Lang compatibility revert).

July 2025

52 Commits • 8 Features

Jul 1, 2025

July 2025 performance summary: Stabilized authentication flows, expanded Company Associations API capabilities, and hardened security posture, while delivering UX improvements to the digital authorisation journey and onboarding flows. These efforts reduce user friction, accelerate feature delivery, and lower operational risk.

June 2025

61 Commits • 19 Features

Jun 1, 2025

June 2025: Delivered significant improvements to two core web apps, focusing on Digital Authorisation and user management flows, with major architectural migrations, security updates, and extensive testing. Key features delivered include Digital Authorisation Journey (restored handler/controller, updated dependencies, navigation middleware, permissions handling, confirmation page), and Email Invitation Journey (digital authorisation flow). Migrated to new navigation middleware with configuration-driven journeys, replacing legacy middleware; added routes, tests, and comprehensive cleanup. Additional improvements include path handling, scroll behavior after search, and cancel flow validations in Manage Users. Bug fixes fixed authentication redirects, path issues, missing params, and enhanced stability. Security and quality: updated dependencies to address vulnerabilities; nodemon config aligned with project structure; code quality/refactoring and improved documentation. Business value: reduces friction in digital authorisation, strengthens security posture, improves developer efficiency and test coverage, and delivers maintainable navigation logic across journeys.

May 2025

21 Commits • 9 Features

May 1, 2025

May 2025 performance summary focused on delivering localized, reliable user-management flows, improving observability, and strengthening security posture through targeted dependency updates. Achievements span two repos, delivering business value through localized UX, robust onboarding, improved API reliability, and enhanced development/test tooling.

April 2025

40 Commits • 17 Features

Apr 1, 2025

April 2025 accomplishments across two web applications (your-companies-web and acsp-manage-users-web). Highlights include strengthening test automation for critical flows, resilience improvements, and a major codebase refactor, all aligned with business outcomes such as reduced production risk, faster feedback loops, and improved maintainability. Deliverables spanned test coverage, data realism, dependency upgrades, UI/UX refinements, accessibility, and localization groundwork.

March 2025

42 Commits • 12 Features

Mar 1, 2025

March 2025 highlights substantial strengthening of test infrastructure and expanded test coverage for IDVA6-2271 across two repositories (your-companies-web and acsp-manage-users-web). The work delivered more reliable QA processes, broader validation of critical user flows, and targeted quality/security improvements. These efforts reduced deployment risk, improved code maintainability, and accelerated future changes by catching issues earlier in CI.

February 2025

11 Commits • 4 Features

Feb 1, 2025

February 2025 delivered a focused set of features and quality improvements for the acsp-manage-users-web project, aimed at increasing security, reliability, data integrity, and maintainability. Delivered a new Access Denied Flow with a dedicated error page, routing, and localized UX to clearly handle unauthorized access. Overhauled error handling with unified error pages, a dedicated 404, improved CSRF cues and localization, and tightened type safety and tests. Introduced input validation to enforce a 254-character max on email in the user management UI, improving data quality and preventing edge-case issues. Enhanced robustness by adopting optional chaining for null-safe access to user role data, reducing runtime errors. These updates reduce support overhead, improve user experience for restricted access scenarios, and position the codebase for safer evolutions. Key work aligns with IDVA6-1951, IDVA6-2238, IDVA6-2239, IDVA6-2244 and related SonarQube/test adjustments across the month.

January 2025

5 Commits • 2 Features

Jan 1, 2025

Concise monthly summary for 2025-01 across two repositories, focusing on delivering quality improvements, maintainability gains, and navigation reliability that collectively reduce risk and support faster future delivery.

December 2024

17 Commits • 5 Features

Dec 1, 2024

December 2024 monthly summary focusing on key accomplishments across two repositories: acsp-manage-users-web and your-companies-web. Delivered features and improvements that enable safer feature rollout, improved navigation, and stronger security postures, while modernizing core URL handling and data handling to support future enhancements.

November 2024

13 Commits • 4 Features

Nov 1, 2024

November 2024 — Key features delivered and major fixes across two repositories, with improvements to user workflow reliability, testing quality, and CI/CD execution. Delivered work spans front-end user-management flows, test architecture, build tooling, documentation, and environment stability, enhancing business value through reduced risk and faster delivery cycles. Key features and enhancements: - acsp-manage-users-web: User Removal Workflow Improvements and Bug Fixes. Fixes include clearing session data for removed users to prevent stale data, UX alignment of the remove-member flow to the latest prototype, removal of the obsolete confirmation screen and related routing, and cleanup of unused constants/navigation for maintainability. Representative commits include 9bc302b4e978d4ecc8bbe290eb17db108eb50c7c, 767a987f89be5f4435cf2b3fa8493e2ac7fdc5e6, 58c45ae40297233eface4f14218154126286db9e, 070d381a278c3fbcac143fe3c69f1a121a1fc6c9, 89c2e29365d7e88f8b659d1992b3ee93d5461fb3. - acsp-manage-users-web: Testing and Code Quality Improvements. Refactors to reduce duplication in tests, centralized mocking of process.exit, clearer test structure, and consolidation of constants usage for reliability. Commits: d4ea0f909c5af7b3c10b1f534bc2c2e8f503e558, 689fc67bbd44d6fb878caba28e861862047d760e. - acsp-manage-users-web: CI/Build Tooling Improvements. Coverage script rename, unified coverage commands, reliable SonarQube data production, and Makefile updates to run tests before analysis. Commits: 8b2192eaaadfb8b46e226691f9466671163d79d3, 03beb10c777baa7df9d27d10ece0b928b74e4b28, a6c316169d93669842c6c9fbeec5cff45f0d4fa2. - acsp-manage-users-web: Documentation Improvements. Spelling and readability polish in README. Commit: 736abac321b46dc84018b3c9215f66b44eb68641. - acsp-manage-users-web: Dependency Maintenance. Reinstalling dependencies to refresh environment and ensure consistency. Commit: fe1fb93a0c89c5be5c0d833e4ad9aba8d40c1b33. - your-companies-web: CI Pipeline Improvement. Run unit tests before SonarQube to publish statistics for the main branch, improving quality metrics visibility. Commit: ee87b6c9edbcf9ffdf7c069d516c28933fc8f57b. Major bugs fixed: - IDVA6-1819: Fixes for missing removed user data on the success page, ensuring accurate post-removal state. - IDVA6-1857: Remove Yourself workflow updated to latest prototype; obsolete confirmation screen removed; related routing and constants cleaned. - IDVA6-1837: Test setup cleaned to remove duplication and hard-coded strings, increasing reliability of test runs. - IDVA6-1843: Sonar statistics reliably published by running unit tests before analysis in CI. Overall impact and accomplishments: - Increased reliability of user removal flows and reduced chances of displaying stale data. - Improved test reliability and maintainability through consolidated mocks and constants. - Faster, more predictable CI/CD with reliable coverage and SonarQube metrics; easier onboarding due to consistent environment setup. - Clear cross-repo collaboration demonstrated by parallel improvements in two repos and alignment of CI pipelines. Technologies/skills demonstrated: - Front-end/Full-stack web development (JavaScript/TypeScript), UI workflow refinements. - Test architecture, mocking, and modernization of test data and strings to constants. - CI/CD tooling, Makefile orchestration, and SonarQube integration. - Dependency management and environment stabilization for consistent development experiences.

October 2024

4 Commits • 1 Features

Oct 1, 2024

Month: 2024-10. Focused delivery in the manage-users web flow for Companies House, delivering UI/content improvements and reliability fixes that improve admin usability and data consistency. All work aligns with prototype guidance and language/localization assets to ensure clear, consistent messaging.

Activity

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Quality Metrics

Correctness90.2%
Maintainability91.0%
Architecture84.8%
Performance85.6%
AI Usage21.0%

Skills & Technologies

Programming Languages

CSSDockerfileGitHTMLJSONJavaJavaScriptMakefileMarkdownNunjucks

Technical Skills

API Client DevelopmentAPI IntegrationAPI Integration TestingAPI SecurityAPI TestingAccess ControlAccessibilityAuthenticationBack End DevelopmentBack-end DevelopmentBackend DevelopmentBackend IntegrationBackend developmentBug FixingBuild Automation

Repositories Contributed To

5 repos

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

companieshouse/your-companies-web

Nov 2024 Oct 2025
11 Months active

Languages Used

MakefileJavaScriptNunjucksTypeScriptJSONHTMLSCSS

Technical Skills

Build AutomationCI/CDBackend DevelopmentBackend developmentCode OrganizationCode Standardization

companieshouse/acsp-manage-users-web

Oct 2024 Oct 2025
13 Months active

Languages Used

JavaScriptNunjucksTypeScriptHTMLMakefileMarkdownCSSJSON

Technical Skills

Front End DevelopmentFrontend DevelopmentNode.jsTemplatingTestingWeb Development

companieshouse/ch.gov.uk

Sep 2025 Oct 2025
2 Months active

Languages Used

GitHTMLPerlTemplate ToolkitTwigjinja2YAML

Technical Skills

Backend DevelopmentCode RefactoringFront End DevelopmentFront-end DevelopmentFrontend DevelopmentHTML

companieshouse/api-sdk-node

Jul 2025 Jul 2025
1 Month active

Languages Used

JavaScriptTypeScript

Technical Skills

API Client DevelopmentAPI IntegrationBackend DevelopmentCode RefactoringNode.jsRefactoring

companieshouse/psc-data-api

Aug 2025 Sep 2025
2 Months active

Languages Used

JavaPython

Technical Skills

API IntegrationAPI TestingBackend DevelopmentData ModelingDependency ManagementJava

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