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Jiří Čermák

PROFILE

Jiří Čermák

Over a two-month period, contributed to the trezor/trezor-suite and trezor/trezor-firmware repositories by delivering features that enhanced cross-network analytics, security, and user experience. Developed and integrated graph features with ADA support, improved UI/UX through contextual tooltips and receive-address utilities, and implemented security measures such as disabling compromised device actions. Upgraded Ethereum testnet configurations and modernized build tooling, including Redux Toolkit and webpack. Utilized TypeScript, JavaScript, and React to refactor components, optimize performance, and streamline state management. Addressed both feature development and bug fixes, focusing on maintainability, data accuracy, and scalable architecture for desktop wallet applications.

Overall Statistics

Feature vs Bugs

63%Features

Repository Contributions

51Total
Bugs
11
Commits
51
Features
19
Lines of code
7,494
Activity Months2

Work History

October 2025

29 Commits • 9 Features

Oct 1, 2025

October 2025 (trezor/trezor-suite): Delivered core features to enhance security visibility, data accuracy, and user experience, while modernizing the codebase with critical tooling upgrades. Key outcomes include MEV protection analytics integration, fiat-based token sorting, SOL rewards UX improvements, and targeted refactors that improve maintenance and reliability. These efforts drive measurable business value: clearer analytics, improved token decision-making for users, more robust reward information, and a more scalable, secure platform ready for rapid iteration.

September 2025

22 Commits • 10 Features

Sep 1, 2025

September 2025 highlights: Delivered cross-network graph feature integration with ADA support, extensive UI/UX refinements, and security hardening across trezor-suite and firmware. Achievements include multi-network feature propagation and backend-driven configuration; UX improvements with receive-address utilities and contextual tooltips; performance and polyfill optimizations; and a Hoodi-based Ethereum testnet upgrade for firmware.

Activity

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Quality Metrics

Correctness92.4%
Maintainability91.2%
Architecture90.0%
Performance87.4%
AI Usage20.4%

Skills & Technologies

Programming Languages

CJSONJavaScriptNodePythonSVGTypeScriptYAMLcssnode

Technical Skills

API IntegrationAnalyticsAnalytics IntegrationBlockchainBuild System ManagementBuild ToolsCode MaintenanceCode OrganizationCode Ownership ManagementCode QualityComponent DevelopmentComponent Library DevelopmentComponent RefactoringDependency ManagementDesktop Application Development

Repositories Contributed To

2 repos

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

trezor/trezor-suite

Sep 2025 Oct 2025
2 Months active

Languages Used

JavaScriptSVGTypeScriptcsstsxJSONNodeYAML

Technical Skills

API IntegrationBuild ToolsCode MaintenanceCode OrganizationCode QualityComponent Refactoring

trezor/trezor-firmware

Sep 2025 Sep 2025
1 Month active

Languages Used

CPython

Technical Skills

BlockchainEthereumFirmware DevelopmentTestnet Management