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Mateusz Marek Bacherycz

PROFILE

Mateusz Marek Bacherycz

Over 18 months, this developer delivered robust frontend solutions for Altinn/dialogporten-frontend and Altinn/altinn-components, focusing on user experience, accessibility, and maintainability. They engineered features such as onboarding tours, advanced filtering, and profile management, while implementing automated testing and visual regression workflows to ensure quality. Their technical approach emphasized modular React and TypeScript development, leveraging GraphQL for data integration and Playwright for end-to-end testing. By modernizing UI components, strengthening localization, and refining error handling, they improved reliability and scalability. Their work addressed real-world requirements, such as authorization-aware UI feedback and notification workflows, resulting in more resilient, user-focused applications.

Overall Statistics

Feature vs Bugs

62%Features

Repository Contributions

241Total
Bugs
55
Commits
241
Features
91
Lines of code
35,042
Activity Months18

Work History

April 2026

3 Commits • 3 Features

Apr 1, 2026

April 2026 monthly performance focused on delivering business value through automated quality enablement and authorization UX enhancements across two repositories: Altinn/altinn-components and Altinn/dialogporten-frontend.

March 2026

17 Commits • 4 Features

Mar 1, 2026

March 2026 performance summary for Altinn development: Key features delivered focused on reliability, UX, and scalable configuration: - Address Verification and Notification Delivery Control: implemented verification workflow for email/SMS, tied verification status to notification delivery, added resending of verification codes, and introduced feature flags for profile resend and per-service settings with visibility controls in the profile UI. This enables safer onboarding of addresses and more predictable notification delivery. - Saved Searches Management and Bookmarking: overhauled the saved searches and bookmarking flow with a new inbox bookmarks modal, redesigned saved searches page, improved button placement, and added tests to ensure stability. - Per-service Notification Dashboard: delivered a dedicated dashboard and logic for per-service notification configuration, with safeguards to prevent API overload and smoother single-service enablement. - Profile Settings UI Enhancements: simplified profile settings for self-identified users by hiding irrelevant options, reducing cognitive load and support queries. - Datepicker UI fixes: upgraded UI library to resolve the Datepicker scrollbar issue, and added a targeted fix to prevent unintended navigation when the scrollbar is used in the datepicker. Major bugs fixed: - Prevented saving unverified addresses and ensured correct re-send API usage. - Fixed unintended date navigation in datepickers (both in dialogporten frontend and components library). - Improved visibility of notifications information and guarded against misconfiguration in per-service settings. Overall impact and business value: - Improved delivery reliability by ensuring only verified addresses trigger notifications, reducing failed deliveries and support overhead. - Streamlined user journeys (SI users) and reduced UI clutter, increasing adoption and satisfaction. - Enhanced scalability with per-service controls and robust testing, enabling safer feature rollouts. Technologies and skills demonstrated: - Frontend React/TypeScript, feature flags, debounced API calls, and library upgrades. - Per-service architecture, UI/UX design improvements, and accessibility considerations. - Test-driven improvements with Playwright tests for bookmarks.

February 2026

1 Commits • 1 Features

Feb 1, 2026

February 2026 monthly summary focusing on delivering business value and technical excellence in the Altinn/dialogporten-frontend. The month centered on delivering a UI-focused enhancement to improve relevance and reduce clutter in dialog management by leveraging a filter-based exclusion for deleted parties.

January 2026

15 Commits • 6 Features

Jan 1, 2026

January 2026 monthly summary: Delivered significant frontend enhancements and stability improvements across Altinn/dialogporten-frontend and Altinn/altinn-components, focusing on business value through improved error handling, UI reliability, and localization. Key contributions included redesigning the error page, upgrading core dependencies, enhancing translations, and implementing visibility controls for deleted entities alongside improved Sent view grouping.

November 2025

45 Commits • 14 Features

Nov 1, 2025

November 2025 focused on unifying navigation, improving performance, and strengthening cross-app consistency across Altinn components and frontend apps. Key features were delivered for faster user workflows, while robust fixes reduced friction and increased reliability. Business value was realized through streamlined search, improved onboarding, and stable UI behavior across multiple apps.

October 2025

26 Commits • 9 Features

Oct 1, 2025

October 2025 monthly delivery focused on resilience, onboarding, cross-browser consistency, and library modernization across Altinn/dialogporten-frontend and Altinn/components. Key outcomes include robust error handling for embedded content, an onboarding tour with a responsive UI, cross-browser icon rendering fixes (Safari), and essential component library updates to improve stability and compatibility. These efforts drive reduced user friction, faster onboarding, and improved UI consistency across platforms.

September 2025

14 Commits • 7 Features

Sep 1, 2025

September 2025 monthly summary for Altinn development focusing on delivering user-centric features, improving security, localization, accessibility, and onboarding UX across two repos: Altinn/dialogporten-frontend and Altinn/altinn-components. Key business value delivered includes a smoother inbox experience, stronger security posture, and clearer, translated UI – enabling faster onboarding and reduced support friction.

August 2025

18 Commits • 6 Features

Aug 1, 2025

August 2025 monthly summary: Delivered a blend of feature work, UI stabilization, and automated testing improvements across Altinn components and dialogporten-frontend. Key outcomes include cleaning up the logo system in altinn-components, stabilizing the account list UI, expanding end-to-end test coverage, and enhancing onboarding and inbox reliability. Stability was further improved through targeted dependency upgrades and more robust error handling, contributing to faster deployments and higher user satisfaction.

July 2025

19 Commits • 5 Features

Jul 1, 2025

July 2025 monthly summary focusing on delivering a robust, user-friendly frontend experience across two core repos. Key efforts centered on reliability, UX improvements, and developer velocity through targeted UI/UX refinements, data accuracy, and dependency maintenance.

June 2025

9 Commits • 4 Features

Jun 1, 2025

June 2025 focused on expanding self-service capabilities for user profiles, strengthening accessibility, and refining navigation and filtering to boost productivity. Key profile enhancements were delivered in Altinn/dialogporten-frontend, including a comprehensive Profile Settings area, an Activities center with search/filter, and a Profile Notifications page, complemented by integrated authorization/access management and improved inbox filtering. Accessibility improvements were applied to GlobalMenu, and profile landing updates/ tests were added to ensure design consistency and quality.

May 2025

14 Commits • 5 Features

May 1, 2025

May 2025 was marked by performance, accessibility, and maintainability enhancements across Altinn components and the dialogporten frontend. Delivered user-centric UI improvements to boost perceived performance, introduced scalable rendering for large datasets, strengthened accessibility/testing capabilities, and stabilized critical inbox flows while ensuring compatibility with newer frontend dependencies. These changes collectively reduce latency, improve data visibility, and support faster feature delivery. Technologies/skills demonstrated: React-based UI refactors, skeleton loading and avatar loading states, virtualization for lists, accessibility enhancements (id props and testing), internationalization/ translations for SSN display, responsive design for mobile, and proactive dependency upgrade maintenance (ac v28).

April 2025

9 Commits • 6 Features

Apr 1, 2025

April 2025 monthly summary focusing on business value and technical achievements across two repos. Delivered accessibility, localization, UX improvements, and test coverage enhancements, driving better user experience and operational efficiency.

March 2025

16 Commits • 5 Features

Mar 1, 2025

March 2025 monthly summary: Delivered significant UI and performance enhancements across Altinn components and the dialogporten-frontend. Implemented date-desc sorting for dialogs with demo data, added a hidden property for dialog actions and updated UI definitions, and filtered hidden actions to improve clarity. Introduced virtualization for large lists (MenuItems and accounts) to boost rendering performance. Enhanced the Dialog Inbox with improved sorting/grouping and robust refresh behavior, and ensured search state resets when the input is cleared. These changes reduce user friction, improve responsiveness for large datasets, and demonstrate strong React/TypeScript and frontend performance skills.

February 2025

11 Commits • 6 Features

Feb 1, 2025

February 2025 delivered measurable business value by strengthening accessibility, UI consistency, data integrity, and developer tooling across Altinn components and the dialog portal frontend. Key outcomes include automated WCAG checks in the build, security-conscious dialog link handling, a major UI refactor to standardized library components, improved sender visibility and search capabilities, and enhanced data consistency and observability. These changes reduce manual QA effort, improve user trust and onboarding, accelerate future feature delivery, and support more reliable maintenance.

January 2025

7 Commits • 3 Features

Jan 1, 2025

January 2025 monthly summary focusing on key accomplishments and business value across two repositories. Delivered UI modernization and accessibility improvements in the frontend, fixed critical filtering bugs, expanded test and accessibility coverage, and streamlined local development. Demonstrated strong collaboration with the Altinn components library and improved developer experience.

December 2024

5 Commits • 2 Features

Dec 1, 2024

December 2024 performance summary for Altinn/dialogporten-frontend: Delivered major UI and quality improvements including Inbox UI enhancements with accurate remaining counts and component standardization, persisted filter state via URL, fixed distinct parties/subparties listing, and stabilized end-to-end tests after layout integration. These changes deliver measurable business value through improved user experience, reduced risk of navigation loss, and a more maintainable, testable frontend.

November 2024

8 Commits • 2 Features

Nov 1, 2024

2024-11 monthly summary for Altinn/dialogporten-frontend focused on navigation reliability and saved-search stability. Delivered a cohesive set of frontend improvements that enhance UX consistency, reduce user confusion, and improve maintainability. Key outcomes: - Navigation State Persistence and URL Parameter Handling: Implemented persistence of query/search parameters across navigation, ensured initial state is derived from URL parameters, stabilized profile/party context for navigation without flicker, and reduced back-button state flicker. Commit highlights include 1ad78cbabb9a2e8f0fef302044b95d22739eb300, 4480ae40031b3f407d637fc0cce8974d64e6e826, 4196f0f30779daa1218848f125c4c0f9653c7413, fe107a6611671492a7e848d337a14c7e9109be4a, b42ad0575a51c134dcb0aa9b95b8148fe308ae0b. - Navigation History Bug: Prevent Duplicate History Entries: Fixed multiple browser history pushes when navigating with the search bar by switching to replace behavior for search params, ensuring clean state. Commit: 90fa546ffdfaae761a3fe34bc371ff1142d4154f. - Saved Searches Reliability and Party Context: Improved saved searches to avoid duplicates, ensure save logic works with search bar input, and preserve party context in saved search links. Commits: a6be41cd186c3d1a5a120049f28b75d5518ddefb, 71aac4bec1700c5bcdb0874de40fed3b6112b5f8. Overall impact: Enhanced user experience through predictable navigation, reliable saved searches, and context-aware links; reduced flicker and safer history handling translate to higher user satisfaction and lower support friction. Technologies/skills demonstrated: TypeScript/React frontend development, URL state management, History API usage, context propagation, deduplication logic, and refactoring of back-button behavior for stability.

October 2024

4 Commits • 3 Features

Oct 1, 2024

Oct 2024 — Altinn/dialogporten-frontend: Security hardening, UX improvements, and expanded test coverage. Key outcomes include production GraphiQL access control, loading indicators for GUI actions, and enhanced date filtering with tests. These changes improve security posture, perceived responsiveness, data accuracy, and maintainability.

Activity

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Quality Metrics

Correctness88.6%
Maintainability86.0%
Architecture81.6%
Performance81.8%
AI Usage22.0%

Skills & Technologies

Programming Languages

BicepCSSGraphQLHTMLJSONJavaScriptMarkdownReactShellTypeScript

Technical Skills

API IntegrationAccessibilityAccessibility TestingAltinn ComponentsAnalyticsAuthenticationAutomated TestingBackend DevelopmentBug FixCI/CDCSSCSS ModulesCode CleanupComponent DesignComponent Development

Repositories Contributed To

2 repos

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

Altinn/dialogporten-frontend

Oct 2024 Apr 2026
18 Months active

Languages Used

BicepJavaScriptTypeScriptYAMLCSSHTMLReactGraphQL

Technical Skills

Backend DevelopmentConfiguration ManagementDevOpsFrontend DevelopmentInfrastructure as CodePlaywright

Altinn/altinn-components

Jan 2025 Apr 2026
14 Months active

Languages Used

TypeScriptCSSHTMLJavaScriptReacttsxcssShell

Technical Skills

Front-end DevelopmentReactTypeScriptAccessibility TestingCSSFront End Development