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Matej Kriz

PROFILE

Matej Kriz

Matej Kriz developed and maintained core features and stability improvements for the trezor-suite repository, focusing on mobile and web wallet experiences. He engineered device authentication, onboarding flows, and analytics integration using TypeScript, React Native, and Redux, ensuring secure and reliable user journeys. His work included refining CI/CD pipelines, automating build processes, and enhancing error reporting with Sentry, which improved release reliability and developer feedback loops. Matej addressed UI consistency, Bluetooth device handling, and localization, while also centralizing configuration and state management. His contributions demonstrated depth in asynchronous programming, DevOps, and cross-platform development, resulting in robust, maintainable codebases.

Overall Statistics

Feature vs Bugs

40%Features

Repository Contributions

103Total
Bugs
34
Commits
103
Features
23
Lines of code
5,551
Activity Months10

Work History

October 2025

12 Commits • 3 Features

Oct 1, 2025

October 2025 highlights for trezor/trezor-suite: Delivered Bluetooth troubleshooting resources and device handling improvements across mobile/native apps to enhance onboarding, troubleshooting, and stability for BLE devices. Implemented a loading-state UX to prevent duplicate actions, reducing user errors. Fixed critical data integrity issues including drafts cleanup for token changes and corrected misinformation in UI/firmware content. Updated documentation and versioning to improve release hygiene and QA visibility.

September 2025

21 Commits • 6 Features

Sep 1, 2025

September 2025 summary focusing on stability, native UX improvements, and release readiness for trezor-suite. Key features delivered include enhancements to configuration and debugging UX, mobile-native capabilities, and localization support, while major CI and deployment improvements increased release reliability. Major bugs fixed improved navigation, data accuracy, and test stability, reducing user friction and supporting faster iteration cycles. The month demonstrated strengths across web and native platforms, with emphasis on performance, reliability, and developer productivity.

August 2025

6 Commits • 1 Features

Aug 1, 2025

Monthly summary for 2025-08 highlighting trezor/trezor-suite contributions, with a focus on delivering business value and technical excellence. Key outcomes include reliable price data display on account detail, improved UX during asset loading, and streamlined testing through CI/DevOps enhancements. The work demonstrates strong data correctness, user-centric UX improvements, and scalable development workflows that support faster release cycles and lower testing friction.

July 2025

4 Commits • 1 Features

Jul 1, 2025

July 2025: Focused on stability, reliability, and developer experience for trezor-suite. Delivered four changes across UI, native USB transport, and onboarding UX, with clear business impact and measurable improvements in user experience and developer productivity.

June 2025

7 Commits • 1 Features

Jun 1, 2025

June 2025: Focused on stabilizing Android UI, refining onboarding flows, and simplifying maintenance while preserving strong security posture. Delivered UI consistency improvements for Android text rendering, corrected wallet creation behavior to prevent misconfigurations, and streamlined the coin enabling onboarding flow with safer redirects and navigation. A maintenance change removed an unnecessary biometric check to simplify the codebase, improving maintainability and reducing potential edge-case branches.

May 2025

28 Commits • 8 Features

May 1, 2025

May 2025 monthly summary focusing on delivering secure device authentication, reliable onboarding, and release readiness for the trezor-suite project. The work emphasizes business value through security, user clarity, and reduced time-to-release, with solid technical execution across native and common code. Overall: Implemented core device authenticity verification end-to-end, improved UX, centralized backup logic, and strengthened CI/CD for faster, safer deployments while stabilizing onboarding and firmware update flows.

April 2025

16 Commits • 2 Features

Apr 1, 2025

April 2025: Delivered privacy-conscious analytics integration, centralized error reporting, UI polish improvements, and strengthened release engineering for trezor-suite. These efforts reduced risk in analytics data handling, improved onboarding reliability, and hardened the CI/CD pipeline to enable safer, faster releases in production.

March 2025

7 Commits • 1 Features

Mar 1, 2025

March 2025 monthly package: trezor-suite delivered targeted reliability and UX improvements, with a strong emphasis on CI/CD stability, environment management, and robust startup behavior. The team reinforced build-system hygiene, improved user-facing prompts related to device state, and tightened error handling during initialization. These efforts reduce friction for developers and users while enabling faster, safer releases.

February 2025

1 Commits

Feb 1, 2025

Feb 2025 monthly summary for mrousavy/expo: Implemented a targeted documentation fix to correctly display the @expo/fingerprint package title in the README, with commit d70b38ae028325b92f1b915e0e969a66dd4c3caf. This improvement enhances accuracy, reduces onboarding confusion, and aligns docs with official package naming.

January 2025

1 Commits

Jan 1, 2025

January 2025 — Repository: mrousavy/expo. Key feature delivered: Detox Testing Stabilization to fix Android dev-client startup errors by making launchAssetFile nullable and logging a warning when accessed, enabling Detox testing in development builds. This targeted fix reduces startup flakiness, improves the reliability of Android end-to-end tests, and accelerates feedback for mobile development. Overall, the change enhances the developer experience and test readiness without impacting production behavior.

Activity

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Quality Metrics

Correctness87.4%
Maintainability89.0%
Architecture84.2%
Performance85.6%
AI Usage21.6%

Skills & Technologies

Programming Languages

BashJavaJavaScriptKotlinMarkdownN/AReact NativeRubyShellText

Technical Skills

AWS S3AnalyticsAnalytics IntegrationAndroid DevelopmentAsync ThunksAsynchronous ProgrammingBluetoothBuild AutomationBuild OptimizationBuild Process AutomationBuild Process ManagementBuild ToolsCI/CDCode OrganizationCode Refactoring

Repositories Contributed To

2 repos

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

trezor/trezor-suite

Mar 2025 Oct 2025
8 Months active

Languages Used

BashJavaScriptN/ATextTypeScriptYAMLRubyReact Native

Technical Skills

Async ThunksBuild AutomationBuild Process AutomationBuild Process ManagementCI/CDConfiguration Management

mrousavy/expo

Jan 2025 Feb 2025
2 Months active

Languages Used

JavaKotlinMarkdown

Technical Skills

Android DevelopmentDevOpsE2E TestingDocumentation

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