EXCEEDS logo
Exceeds
Matej Kriz

PROFILE

Matej Kriz

Over 17 months, contributed to the trezor-suite repository by delivering 58 features and resolving 53 bugs, focusing on secure wallet development, robust CI/CD pipelines, and cross-platform mobile experiences. Work included implementing AES-256-GCM encryption for sensitive data, refining onboarding and device authentication flows, and enhancing analytics configurability for business insights. Leveraged TypeScript, React Native, and Redux to build resilient UI components, optimize build automation, and streamline state management. Prioritized reliability and maintainability through rigorous test automation, DevOps improvements, and proactive debugging, resulting in faster release cycles, improved user experience, and scalable engineering workflows across Android, iOS, and web platforms.

Overall Statistics

Feature vs Bugs

52%Features

Repository Contributions

208Total
Bugs
53
Commits
208
Features
58
Lines of code
12,401
Activity Months17

Work History

May 2026

6 Commits • 2 Features

May 1, 2026

Concise monthly summary for 2026-05 focused on trezor-suite delivery, reliability, and user experience enhancements across cross-browser scenarios.

April 2026

15 Commits • 3 Features

Apr 1, 2026

April 2026 monthly summary highlighting key business value and technical achievements across trezor-suite. Focused on reliability, user experience, cross‑platform resilience, and faster engineering feedback through CI improvements. Deliverables spanned Suite Sync UX and error handling enhancements, stability fixes after a Skia/Svg update, CI/test workflow hardening, and device initialization improvements.

March 2026

5 Commits • 4 Features

Mar 1, 2026

March 2026 monthly summary focused on delivering UX refinements, build reliability, and safer development/testing workflows for the trezor-suite repository. Highlights include key UX improvement, CI/test stability, and Expo platform integration enabling safer local configurations. Overall impact: enhanced user satisfaction through a smoother label editing flow, more stable end-to-end builds with reduced fingerprint churn, and safer non-production testing environments with explicit dev-server usage. The work also lays groundwork for Expo-managed configuration integration in Suite-native.

February 2026

27 Commits • 16 Features

Feb 1, 2026

February 2026 (2026-02) monthly summary for trezor/trezor-suite: this period focused on stabilizing the CI pipeline, cleaning up configuration and UX, and expanding analytics configurability to support business decisions. Key features and UX improvements were delivered, along with several bug fixes that improved TX detail reliability and label rendering. Analytics enhancements provide flexible endpoints and better debuggability for performance and user insights. These efforts collectively improved build reliability, developer productivity, and user experience, while strengthening our analytics capabilities.

January 2026

20 Commits • 3 Features

Jan 1, 2026

January 2026 (2026-01) monthly summary for trezor/trezor-suite focusing on delivered features, bug fixes, and overall impact.

December 2025

12 Commits • 1 Features

Dec 1, 2025

December 2025: Focused on stabilizing the dev/test workflow for trezor-suite while advancing tooling modernization. Delivered a hardened build/dev experience and stabilized iOS test automation to support reliable releases and faster feedback loops.

November 2025

20 Commits • 6 Features

Nov 1, 2025

November 2025 monthly summary focusing on key accomplishments across trezor-suite: delivered a robust state migration framework with async migrations and initial migration support, including migrating autoEject from device to walletSettings to ensure persistence integrity across version upgrades. Analytics and telemetry were unified for device connections and onboarding, with new reports for device-found, device-paired, and THP connection confirmations. Onboarding and demo experience were enhanced with a demo account questionnaire gated by feature flags and integrated analytics. UI/UX visuals received refinements to improve visibility and consistency. Stability and reliability were boosted by skipping flaky tests and relaxing redux-persist timeout to prevent data loss. Developer tooling and CI/CD improvements added an icon generation script and pinned the Expo CLI version to stabilize CI builds.

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

Loading activity data...

Quality Metrics

Correctness90.8%
Maintainability88.4%
Architecture85.8%
Performance86.8%
AI Usage21.8%

Skills & Technologies

Programming Languages

BashJSONJavaJavaScriptKotlinMarkdownN/ANoneReact NativeRuby

Technical Skills

AWS S3AnalyticsAnalytics IntegrationAndroid DevelopmentAsync ThunksAsynchronous ProgrammingBackend DevelopmentBluetoothBuild AutomationBuild OptimizationBuild Process AutomationBuild Process ManagementBuild ToolsCI/CDCode Organization

Repositories Contributed To

2 repos

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

trezor/trezor-suite

Mar 2025 May 2026
15 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