trezor/trezor-firmware
Sep 2024 – Apr 2026
20 Months active
Languages Used
CPythonJSONProtoBufRustJavaScriptMarkdownTypeScript
Technical Skills
C programmingPythonPython programmingcryptographyembedded systemsfirmware development
Ioan Bizău
PROFILE
Ioan Bizău
Over 20 months, Ibrahim developed and maintained core features for the trezor/trezor-firmware repository, focusing on secure transaction flows, blockchain integrations, and robust UI/UX. He engineered multi-chain payment request UIs, enhanced Ethereum and Stellar signing, and streamlined device pairing and recovery flows. Using C, Python, and Rust, Ibrahim refactored legacy modules, modularized protocol constants, and improved test automation and CI pipelines to ensure reliability and rapid iteration. His work emphasized maintainability, localization, and accessibility, extracting shared logic and updating fixtures to support evolving requirements. The depth of his contributions enabled safer releases, broader protocol support, and a more scalable codebase.
Overall Statistics
Feature vs Bugs
75%Features
Repository Contributions
281Total
Bugs
42
Commits
281
Features
126
Lines of code
152,113
Activity Months20
Your Network
38 peopleWork History
April 2026
3 Commits • 1 Features
Apr 1, 2026April 2026: Focused on maintenance, test coverage, and maintainability for trezor-firmware to support safer releases and better localization.
3 Commits • 1 Features
Apr 1, 2026April 2026: Focused on maintenance, test coverage, and maintainability for trezor-firmware to support safer releases and better localization.
April 2026
March 2026
7 Commits • 5 Features
Mar 1, 2026In March 2026, trezor-firmware delivered targeted Ethereum signing enhancements, improved ERC-20 verification, and data formatting improvements that boost security, interoperability, and UX. Key features were implemented to support non-standard pool data formats, secure ERC-20 transfer verification, and clearer handling of token/native currency amounts, while refining the signing workflow with chunk-based constraints and data-size safeguards. The work reduces signing errors, enhances compatibility with evolving DeFi data formats, and aligns with the project’s focus on robust, auditable signing paths. Major refactors and cleanups were performed to simplify the Ethereum signing surface by removing 1inch support, allowing the team to focus on core capabilities and reliability. Technologies demonstrated include RawBytesFormatter integration, SLIP-24 verification, native currency token formatting, 4KB data chunk handling, and first-chunk clear signing controls, all backed by fixture updates and tests.
March 2026
7 Commits • 5 Features
Mar 1, 2026In March 2026, trezor-firmware delivered targeted Ethereum signing enhancements, improved ERC-20 verification, and data formatting improvements that boost security, interoperability, and UX. Key features were implemented to support non-standard pool data formats, secure ERC-20 transfer verification, and clearer handling of token/native currency amounts, while refining the signing workflow with chunk-based constraints and data-size safeguards. The work reduces signing errors, enhances compatibility with evolving DeFi data formats, and aligns with the project’s focus on robust, auditable signing paths. Major refactors and cleanups were performed to simplify the Ethereum signing surface by removing 1inch support, allowing the team to focus on core capabilities and reliability. Technologies demonstrated include RawBytesFormatter integration, SLIP-24 verification, native currency token formatting, 4KB data chunk handling, and first-chunk clear signing controls, all backed by fixture updates and tests.
February 2026
24 Commits • 15 Features
Feb 1, 2026February 2026 (trezor-firmware) delivered tangible business value through modularization, UX improvements, and test/CI stabilization. Key outcomes include decoupling Tron constants by introducing separate sc_constants for Tron, a major refactor to simplify flow wiring by replacing flow_confirm_output, and UX enhancements across Delizia and Eckhart flows (Delizia: back button on summary; Eckhart: external menu on confirm_summary). Maintenance and quality improvements included removing the obsolete ConfirmOutputWithSummary flow, aligning PropertyType usage, updating fixtures, and strengthening tests and CI (e.g., preloading first screenshot, keyboard shortcuts for tests, and disabling the update button in CI) to reduce release risk. These changes collectively improve maintainability, UI consistency, and release reliability, while enabling faster iteration on future features and fixes.
24 Commits • 15 Features
Feb 1, 2026February 2026 (trezor-firmware) delivered tangible business value through modularization, UX improvements, and test/CI stabilization. Key outcomes include decoupling Tron constants by introducing separate sc_constants for Tron, a major refactor to simplify flow wiring by replacing flow_confirm_output, and UX enhancements across Delizia and Eckhart flows (Delizia: back button on summary; Eckhart: external menu on confirm_summary). Maintenance and quality improvements included removing the obsolete ConfirmOutputWithSummary flow, aligning PropertyType usage, updating fixtures, and strengthening tests and CI (e.g., preloading first screenshot, keyboard shortcuts for tests, and disabling the update button in CI) to reduce release risk. These changes collectively improve maintainability, UI consistency, and release reliability, while enabling faster iteration on future features and fixes.
February 2026
January 2026
17 Commits • 4 Features
Jan 1, 2026In January 2026, trezor-firmware delivered a comprehensive UX and signing-flow overhaul, expanded signing capabilities, and strengthened testing infrastructure. Key features include: Enhanced Confirmation UX and Flow with configurable action options and new cancellation dialogs; Cancellation from Amount Screen during Signing to improve user control; Advanced Transaction Signing and Execution Enhancements adding staking flexibility, EIP-7702 signing support, and improved ERC-8021 data handling for Avantis DEX; and Testing Infrastructure and Fixtures Improvements to stabilize UI tests and expand fixtures. Impact: improved user control and confidence in signing flows, broader protocol support (EIP-7702, staking), and reduced release risk through robust test automation and stable fixtures, enabling faster iteration. Technologies/skills demonstrated: UI/UX design and flow engineering, extensive refactoring, protocol signing enhancements, test automation, fixtures management, and test infrastructure development.
January 2026
17 Commits • 4 Features
Jan 1, 2026In January 2026, trezor-firmware delivered a comprehensive UX and signing-flow overhaul, expanded signing capabilities, and strengthened testing infrastructure. Key features include: Enhanced Confirmation UX and Flow with configurable action options and new cancellation dialogs; Cancellation from Amount Screen during Signing to improve user control; Advanced Transaction Signing and Execution Enhancements adding staking flexibility, EIP-7702 signing support, and improved ERC-8021 data handling for Avantis DEX; and Testing Infrastructure and Fixtures Improvements to stabilize UI tests and expand fixtures. Impact: improved user control and confidence in signing flows, broader protocol support (EIP-7702, staking), and reduced release risk through robust test automation and stable fixtures, enabling faster iteration. Technologies/skills demonstrated: UI/UX design and flow engineering, extensive refactoring, protocol signing enhancements, test automation, fixtures management, and test infrastructure development.
December 2025
7 Commits • 5 Features
Dec 1, 20252025-12 monthly summary for trezor-firmware: focused on security hardening, accessibility, UI/UX improvements, and test coverage to reduce risk and accelerate release readiness. Delivered several high-impact features with associated commits, improving security posture, user experience, and test robustness. Key achievements delivered this month include major feature updates and stability enhancements across production and development environments.
7 Commits • 5 Features
Dec 1, 20252025-12 monthly summary for trezor-firmware: focused on security hardening, accessibility, UI/UX improvements, and test coverage to reduce risk and accelerate release readiness. Delivered several high-impact features with associated commits, improving security posture, user experience, and test robustness. Key achievements delivered this month include major feature updates and stability enhancements across production and development environments.
December 2025
November 2025
34 Commits • 21 Features
Nov 1, 2025November 2025 (trezor/trezor-firmware) delivered notable improvements in typography coverage, UI reliability, and test coverage, strengthening user experience and maintainability across flows and languages.
November 2025
34 Commits • 21 Features
Nov 1, 2025November 2025 (trezor/trezor-firmware) delivered notable improvements in typography coverage, UI reliability, and test coverage, strengthening user experience and maintainability across flows and languages.
October 2025
25 Commits • 10 Features
Oct 1, 2025October 2025 focused on strengthening firmware reliability, expanding CI capabilities, and broadening support for complex transaction flows. Key outcomes include automated Tropic model integration in CI, improved test infrastructure, and robustness in trading/payment paths. This month delivered business value by accelerating validation, enabling larger ETH payments, and stabilizing core features across tests and fixtures.
25 Commits • 10 Features
Oct 1, 2025October 2025 focused on strengthening firmware reliability, expanding CI capabilities, and broadening support for complex transaction flows. Key outcomes include automated Tropic model integration in CI, improved test infrastructure, and robustness in trading/payment paths. This month delivered business value by accelerating validation, enabling larger ETH payments, and stabilizing core features across tests and fixtures.
October 2025
September 2025
19 Commits • 9 Features
Sep 1, 2025September 2025 monthly summary for trezor-firmware: Delivered core feature for Stellar SLIP-24 payment requests, enhanced UI marquee behavior, and improved Eckhart flow, complemented by robust string handling and a targeted code refactor. Also strengthened test reliability and localization with fixture updates and translation fixes, improving overall release quality. Highlights: - Core: SLIP-24 payment requests for Stellar implemented to enable streamlined Stellar payments. - Core/UI: Vertical shift of marquee to improve legibility in constrained layouts. - Eckhart: Marquee on menu item subtext and a new tutorial power screen to guide flows. - Core: Split strings by ":" to correctly parse MAC-address-containing strings in the connection button flow. - Core refactor: Removed unused change_code parameters to simplify the core API and reduce maintenance overhead. Additional quality and reliability work included translation/tests adjustments, fixture updates, and targeted bug fixes that enhance test stability and UI consistency.
September 2025
19 Commits • 9 Features
Sep 1, 2025September 2025 monthly summary for trezor-firmware: Delivered core feature for Stellar SLIP-24 payment requests, enhanced UI marquee behavior, and improved Eckhart flow, complemented by robust string handling and a targeted code refactor. Also strengthened test reliability and localization with fixture updates and translation fixes, improving overall release quality. Highlights: - Core: SLIP-24 payment requests for Stellar implemented to enable streamlined Stellar payments. - Core/UI: Vertical shift of marquee to improve legibility in constrained layouts. - Eckhart: Marquee on menu item subtext and a new tutorial power screen to guide flows. - Core: Split strings by ":" to correctly parse MAC-address-containing strings in the connection button flow. - Core refactor: Removed unused change_code parameters to simplify the core API and reduce maintenance overhead. Additional quality and reliability work included translation/tests adjustments, fixture updates, and targeted bug fixes that enhance test stability and UI consistency.
August 2025
17 Commits • 2 Features
Aug 1, 2025Month: 2025-08. Delivered a unified, blockchain-agnostic SLIP-24 Payment Request UI across major blockchains (Bitcoin, Ripple, Cardano, Solana) and Bolt UI, enabling multi-coin payment requests with a generic confirm_payment_request flow. Deprecated the outdated Bitcoin SLIP-24 UI and synchronized tests/fixtures. Also delivered UI robustness improvements for device menus and fixed key UI/formatting bugs to improve usability and reliability. The work expands multi-chain support, reduces maintenance burden, and strengthens the foundation for future blockchain integrations.
17 Commits • 2 Features
Aug 1, 2025Month: 2025-08. Delivered a unified, blockchain-agnostic SLIP-24 Payment Request UI across major blockchains (Bitcoin, Ripple, Cardano, Solana) and Bolt UI, enabling multi-coin payment requests with a generic confirm_payment_request flow. Deprecated the outdated Bitcoin SLIP-24 UI and synchronized tests/fixtures. Also delivered UI robustness improvements for device menus and fixed key UI/formatting bugs to improve usability and reliability. The work expands multi-chain support, reduces maintenance burden, and strengthens the foundation for future blockchain integrations.
August 2025
July 2025
34 Commits • 20 Features
Jul 1, 2025July 2025: Delivered significant UX and release improvements across trezor-firmware, expanding UI flows (Eckhart, core UI, and Ethereum payment requests), enhanced translations workflow, and strengthened test infrastructure. Fixed critical regressions and robustness gaps, including protobuf field handling, account/path assumptions, and memo encoding. These changes improved end-user payment flows, reliability of release artifacts, and test coverage for ETH swaps and translation contexts, while showcasing skills in embedded UI design, translations architecture, and test automation.
July 2025
34 Commits • 20 Features
Jul 1, 2025July 2025: Delivered significant UX and release improvements across trezor-firmware, expanding UI flows (Eckhart, core UI, and Ethereum payment requests), enhanced translations workflow, and strengthened test infrastructure. Fixed critical regressions and robustness gaps, including protobuf field handling, account/path assumptions, and memo encoding. These changes improved end-user payment flows, reliability of release artifacts, and test coverage for ETH swaps and translation contexts, while showcasing skills in embedded UI design, translations architecture, and test automation.
June 2025
7 Commits • 1 Features
Jun 1, 20252025-06 Monthly Summary for trezor-firmware focusing on delivering user-facing UI/UX improvements, stabilizing the build, and updating known addresses to support ongoing business needs. The month emphasized enhancing the pairing experience, improving Bitcoin label handling, and keeping build/test health up-to-date to support a reliable release cycle.
7 Commits • 1 Features
Jun 1, 20252025-06 Monthly Summary for trezor-firmware focusing on delivering user-facing UI/UX improvements, stabilizing the build, and updating known addresses to support ongoing business needs. The month emphasized enhancing the pairing experience, improving Bitcoin label handling, and keeping build/test health up-to-date to support a reliable release cycle.
June 2025
May 2025
10 Commits • 4 Features
May 1, 2025May 2025 highlights include delivering UI polish for Delizia (header behavior, button-aware layout, warnings with tap interaction, and consistent chunked text color), refining the Ethereum transaction confirmation flow, tightening localization and release processes, and maintaining core test fixtures across repositories.
May 2025
10 Commits • 4 Features
May 1, 2025May 2025 highlights include delivering UI polish for Delizia (header behavior, button-aware layout, warnings with tap interaction, and consistent chunked text color), refining the Ethereum transaction confirmation flow, tightening localization and release processes, and maintaining core test fixtures across repositories.
April 2025
14 Commits • 6 Features
Apr 1, 2025April 2025 highlights: Delivered UX-enhancing UI improvements, expanded blockchain support, and strengthened release readiness across trezor-firmware. The month focused on user-facing quality, reliability checks, and foundational workflow improvements to support upcoming features.
14 Commits • 6 Features
Apr 1, 2025April 2025 highlights: Delivered UX-enhancing UI improvements, expanded blockchain support, and strengthened release readiness across trezor-firmware. The month focused on user-facing quality, reliability checks, and foundational workflow improvements to support upcoming features.
April 2025
March 2025
12 Commits • 4 Features
Mar 1, 2025March 2025 focused on delivering UI robustness, streamlined test feedback loops, and a scalable firmware test environment, with a new device management UI and Tropic01 model integration. Key outcomes include faster UI diff reviews, more predictable UI behavior under overflow, ensured Tropic model initialization during tests, and a foundation for extended automated testing via a dedicated device management UI. These improvements reduce manual review time, improve reliability, and enable more agile testing and validation across Trezor firmware releases.
March 2025
12 Commits • 4 Features
Mar 1, 2025March 2025 focused on delivering UI robustness, streamlined test feedback loops, and a scalable firmware test environment, with a new device management UI and Tropic01 model integration. Key outcomes include faster UI diff reviews, more predictable UI behavior under overflow, ensured Tropic model initialization during tests, and a foundation for extended automated testing via a dedicated device management UI. These improvements reduce manual review time, improve reliability, and enable more agile testing and validation across Trezor firmware releases.
February 2025
6 Commits • 2 Features
Feb 1, 2025February 2025: Delivered critical maintenance and user-focused improvements to trezor-firmware, increasing stability and usability. Implemented repository hygiene tasks to keep tests and dependencies current, fixed navigation and signing reliability issues, and introduced user-friendly recovery and long-message confirmation flows. All work spans core, UI, and transaction signing components, contributing to faster release readiness and reduced support friction.
6 Commits • 2 Features
Feb 1, 2025February 2025: Delivered critical maintenance and user-focused improvements to trezor-firmware, increasing stability and usability. Implemented repository hygiene tasks to keep tests and dependencies current, fixed navigation and signing reliability issues, and introduced user-friendly recovery and long-message confirmation flows. All work spans core, UI, and transaction signing components, contributing to faster release readiness and reduced support friction.
February 2025
January 2025
10 Commits • 3 Features
Jan 1, 2025January 2025: Core UI/UX enhancements and cryptographic signing updates for trezor/trezor-firmware, with a focus on delivering business value through a smoother user experience, stronger security posture, and improved maintainability.
January 2025
10 Commits • 3 Features
Jan 1, 2025January 2025: Core UI/UX enhancements and cryptographic signing updates for trezor/trezor-firmware, with a focus on delivering business value through a smoother user experience, stronger security posture, and improved maintainability.
December 2024
5 Commits • 2 Features
Dec 1, 2024December 2024 monthly summary for trezor-firmware focusing on delivering business value with secure UX, reduced production risk, and strengthened test coverage. Key features and fixes were implemented with explicit commit references, contributing to safer releases, better user experience, and higher reliability in the core firmware.
5 Commits • 2 Features
Dec 1, 2024December 2024 monthly summary for trezor-firmware focusing on delivering business value with secure UX, reduced production risk, and strengthened test coverage. Key features and fixes were implemented with explicit commit references, contributing to safer releases, better user experience, and higher reliability in the core firmware.
December 2024
November 2024
26 Commits • 9 Features
Nov 1, 2024November 2024 focused on upgrading internationalization for ETH contract flows, stabilizing the UI, and refactoring the core UI for maintainability. Key outcomes include multilingual translations for ETH contract flow with updated fixtures, a translations string order fix, ETH flow warning priority refactor to surface critical warnings, UI polish reducing layout noise and stabilizing marquee behavior, and enhancements to the paginated blobs UI (page counter and cancel button) along with blob UI tweaks. Core UI refactor introduced show_danger and extensive fixture/copy updates across TS3/TT, complemented by code cleanup. These efforts reduce user friction, improve safety in ETH interactions, and deliver a cleaner, more scalable UI and translation infrastructure. Technologies demonstrated include C/C++ firmware code, UI layer, translation framework, fixture management, and refactoring practices. Business value: higher reliability for ETH flows across locales, faster UI interactions, and a more maintainable codebase for future features.
November 2024
26 Commits • 9 Features
Nov 1, 2024November 2024 focused on upgrading internationalization for ETH contract flows, stabilizing the UI, and refactoring the core UI for maintainability. Key outcomes include multilingual translations for ETH contract flow with updated fixtures, a translations string order fix, ETH flow warning priority refactor to surface critical warnings, UI polish reducing layout noise and stabilizing marquee behavior, and enhancements to the paginated blobs UI (page counter and cancel button) along with blob UI tweaks. Core UI refactor introduced show_danger and extensive fixture/copy updates across TS3/TT, complemented by code cleanup. These efforts reduce user friction, improve safety in ETH interactions, and deliver a cleaner, more scalable UI and translation infrastructure. Technologies demonstrated include C/C++ firmware code, UI layer, translation framework, fixture management, and refactoring practices. Business value: higher reliability for ETH flows across locales, faster UI interactions, and a more maintainable codebase for future features.
October 2024
2 Commits • 2 Features
Oct 1, 2024In October 2024, the trezor-firmware team delivered notable enhancements focused on localization reliability and external protocol interoperability, with a strong emphasis on test coverage and quality. Key outcomes: - Localized user experience improved via restored, full translations for German, French, and Portuguese, eliminating gaps and ensuring clearer in-app terminology. - Nostr protocol support was added, enabling public key retrieval and event signing, along with the necessary message structures, handlers, and a growing suite of tests to validate correctness and resilience. - The combined work strengthens firmware usability across regions and expands interoperability with external services, providing measurable business value and a solid foundation for future integrations. Technologies and practices demonstrated include core firmware development patterns, translation/system integrity work, Nostr protocol integration, and test-driven development with explicit commit hygiene. Overall impact: enhanced user clarity and accessibility, broader platform interoperability, and improved confidence through automated tests and robust feature delivery.
2 Commits • 2 Features
Oct 1, 2024In October 2024, the trezor-firmware team delivered notable enhancements focused on localization reliability and external protocol interoperability, with a strong emphasis on test coverage and quality. Key outcomes: - Localized user experience improved via restored, full translations for German, French, and Portuguese, eliminating gaps and ensuring clearer in-app terminology. - Nostr protocol support was added, enabling public key retrieval and event signing, along with the necessary message structures, handlers, and a growing suite of tests to validate correctness and resilience. - The combined work strengthens firmware usability across regions and expands interoperability with external services, providing measurable business value and a solid foundation for future integrations. Technologies and practices demonstrated include core firmware development patterns, translation/system integrity work, Nostr protocol integration, and test-driven development with explicit commit hygiene. Overall impact: enhanced user clarity and accessibility, broader platform interoperability, and improved confidence through automated tests and robust feature delivery.
October 2024
September 2024
2 Commits • 1 Features
Sep 1, 2024Monthly summary for 2024-09: Delivered Tropic Square secure element integration for the Unix firmware in trezor-firmware. Integrated libtropic into the Unix build, added required sources, includes, and feature flags to enable Tropic cryptographic functionalities. Included a smoke test suite to validate basic functionality and error handling for cryptographic operations, improving security posture and reliability.
September 2024
2 Commits • 1 Features
Sep 1, 2024Monthly summary for 2024-09: Delivered Tropic Square secure element integration for the Unix firmware in trezor-firmware. Integrated libtropic into the Unix build, added required sources, includes, and feature flags to enable Tropic cryptographic functionalities. Included a smoke test suite to validate basic functionality and error handling for cryptographic operations, improving security posture and reliability.
Activity
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Quality Metrics
Correctness91.2%
Maintainability89.0%
Architecture86.6%
Performance85.8%
AI Usage21.0%
Skills & Technologies
Programming Languages
CC++CSSGitJSONJavaScriptMakefileMarkdownNixNone
Technical Skills
API DesignAPI DevelopmentAPI IntegrationAPI designAPI integrationAsynchronous ProgrammingAutomationBackend DevelopmentBitcoinBitcoin transactionsBlockchain DevelopmentBuild AutomationBuild ConfigurationBuild ProcessBuild System Configuration
Repositories Contributed To
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