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Ondrej Hajek

PROFILE

Ondrej Hajek

Over 15 months, contributed to the trezor/trezor-suite repository by building and modernizing end-to-end testing infrastructure, CI/CD pipelines, and automation systems. Leveraged TypeScript, JavaScript, and Playwright to deliver robust test frameworks, device emulation, and modular test utilities, improving reliability and coverage across desktop, web, and Android environments. Integrated AI-driven test selection and observability dashboards, enabling faster feedback and more efficient PR validation. Enhanced CI workflows with Docker and GitHub Actions, reducing flakiness and accelerating release cycles. Addressed complex integration issues, implemented LLM-assisted strategies, and maintained a focus on scalable, maintainable code to support continuous delivery and software quality.

Overall Statistics

Feature vs Bugs

65%Features

Repository Contributions

178Total
Bugs
22
Commits
178
Features
41
Lines of code
34,182
Activity Months15

Work History

May 2026

12 Commits • 3 Features

May 1, 2026

May 2026 monthly summary for trezor-suite focusing on stability, efficiency, and observability improvements across Android E2E testing, quarantine management, and CI/CD. Delivered end-to-end test reliability, faster feedback loops, and improved decision-making for PR testing with LLM-assisted strategies.

April 2026

17 Commits • 3 Features

Apr 1, 2026

April 2026 monthly summary for trezor-suite: Key features delivered include AI-driven CI testing and PR analysis enhancements, CI/CD infrastructure improvements, and data-fetch enhancements for action status filtering. Concurrent bug fixes targeted end-to-end test reliability and ETH test default behavior to improve test stability and determinism. Overall impact includes faster feedback loops, increased test reliability, and stronger release confidence, with broad business value from reduced flaky tests and improved coverage across mobile and CI environments. Key features and notable commits: - AI-driven CI testing and PR analysis enhancements (LLM test selector and AI e2e test analysis, nightly workflow): commits 8508e15c54f66eb0bc55d46423c5dd0843b9c37a; 36918c790d8fe3d2bbefed1ae5353422ee594cb4; 87777f3ac952adb68999ba4ea99c714f9994b022; 9c33cd8109fdaeda1fcae12e29f37356fbad0502 - CI/CD infrastructure and environment improvements (centralized code coverage reporting, Docker/tenv updates, automation): commits 8013d0033b0a740a91fc0bcc00438039ebee656f; 60134e55369e0d3e9b75fe4a87a8f0656dd7695a; 034bf225833fb93db4d683893e6d9ebbf0fc2324; f405d1b5c93c8e0654bac0ed07e5d9a5a63495e9; 81b08b67c443bcb8ba58c626f62b043f54579edc; 6be847dde8ac466cb131f26633226d913e3c9a2e; d222f18fcc0cd3bd9e2c235ed0022b8616450ef2 - Enhanced data fetch capabilities for action status filtering (quarantined actions): commit b80e57fcaa8bb851cbcdd58980370a1f7424dfa6 Major bugs fixed: - End-to-end test reliability improvements across iOS, clipboard handling, and passphrase tests: commits 3eaeb6bbba5a7ecf81d98168431fec84220b3991; 397a004798851b7ce9d7a1d002185ee028f41984; 7947fcb13031b10771af3500dbb9e98f2048c828 - Ethereum (ETH) test default behavior fixed to ensure ETH is not enabled by default: commits d71cac29ac0728624f85cd9f95aab2ccdb6e6e14; bf2bb2d46042149db7b00e6a01c86b4c114aa586 Overall impact and accomplishments: - Accelerated feedback cycles in CI, reduced flaky tests, and improved determinism across CI and E2E suites. - Strengthened test coverage for mobile and backend workflows, enabling safer, faster releases. - Demonstrated strong collaboration between ML-assisted testing, CI engineering, and quality assurance to deliver measurable business value.

March 2026

28 Commits • 12 Features

Mar 1, 2026

March 2026 performance summary for trezor-suite: Expanded automated Android E2E coverage and hardened CI/quarantine workflows. Delivered initial Android E2E tests (T3W1), stabilized end-to-end tests by addressing race conditions and backend updates, and clarified test visibility in PRs via quarantine descriptions. Implemented Currents-based quarantine support and a Detox runner refactor to improve maintainability. Enabled quarantine for Suite Native tests and re-enabled skipped tests, backed by nightly workflows and updated CI environments. These efforts increased release velocity, reduced flaky tests, and improved developer feedback loops, while demonstrating strong cross-functional collaboration across E2E, CI, and backend teams.

February 2026

20 Commits • 2 Features

Feb 1, 2026

February 2026 monthly summary for trezor-suite focusing on strengthening test automation, CI reliability, and enabling PR-driven E2E workflows to improve quality, speed, and risk reduction in product releases.

January 2026

15 Commits • 1 Features

Jan 1, 2026

January 2026 — Delivered a modernization of the trezor-suite end-to-end (E2E) testing framework with Playwright, introducing a new project structure, a dedicated Playwright project builder, device fixtures, configurable test configurations, enhanced tagging and reporting, and refactored test suites to improve reliability and maintainability across desktop and web apps. Implemented CI/CD improvements to stabilize test runs by targeting the correct workspace during Playwright dependency installation and scheduling nightly tests on weekdays. Result: higher test reliability, faster feedback, and reduced CI resource waste, enabling a scalable testing platform and pipeline-driven test selection.

December 2025

14 Commits • 3 Features

Dec 1, 2025

December 2025 monthly summary focusing on delivering reliability and efficiency gains across testing, CI orchestration, and desktop startup. This period closed notable reliability improvements in end-to-end testing, enhanced CI/nightly workflows with robust test filtering and traceability, fixed a critical Canary firmware flag issue in CI, and reduced desktop startup time by removing redundant Electron startup bridge args. Together, these efforts shortened release cycles, increased confidence in product quality, and improved developer velocity.

November 2025

13 Commits • 2 Features

Nov 1, 2025

November 2025 — Trezor Suite Key features delivered: - Solana UX and sending flow improvements: default to the first account to prevent selection errors and ensure max-send calculations account for network reserves during transfers. (Commits: d872a119bf502b39353a4c9291ffa1f3e245ea73; 95d8bf9aac014174033861eb57ce2054428f470f) - End-to-end testing and CI infrastructure improvements: enhanced E2E reliability, test config updates, firmware/test fixtures, migration tests, and CI optimizations to accelerate feedback loops. (Representative commits: edf85631e95e6dd0c72fe1c6e3466b6e7c4aa9a7; 5bf24846d201a127ad2774f08925d891c43fd399; 4affee83ef873d710e510f8635d0c5be2ec4b882; 445ea45125819a58b019496278b3dbf39c80fc36; 4dc83c43286dd55ded373a0191e84fd5c7d5e367; 04cdf597109bd22ae71eb51b030952f54e12a4fe; d71f6c321fbe9461effc3d9a7c84552e1192ee6d; 26f2db9414aa15cd791d219d0cc6588bde34ab29; 0afa30962dd8eeb98fa465029ddd7db49fb6b82e; 7b411888a9df4403e3aa4747699c8ad378ca6ff7; 26cf62f863fa7270030710f919427f4fc6815ffb) Major bugs fixed: - Solana account selection now consistently defaults to the first account. (commit: d872a119bf502b39353a4c9291ffa1f3e245ea73) - Solana send max tests corrected to reflect network reserve calculations. (commit: 95d8bf9aac014174033861eb57ce2054428f470f) - E2E reliability and test-validation fixes: ensured discovery completes before tests, updated migrations, and aligned firmware fixtures for stability. (selected fixes: edf85631e95e6dd0c72fe1c6e3466b6e7c4aa9a7; 5bf24846d201a127ad2774f08925d891c43fd399; 0afa30962dd8eeb98fa465029ddd7db49fb6b82e; 26f2db9414aa15cd791d219d0cc6588bde34ab29) Overall impact and accomplishments: - Enhanced user trust and conversion by reducing Solana transfer errors and simplifying the sending flow. - Strengthened release quality and velocity through a more reliable E2E suite and streamlined CI, enabling faster validation and fewer production incidents. - Improved cross-team collaboration through instrumented commits and end-to-end traceability from feature work to CI improvements. Technologies/skills demonstrated: - Solver of UX edge cases in Solana flows; robust E2E testing; CI/CD optimization; test fixtures and firmware orchestration; migrations and environment management; performance-reviewable change history.

October 2025

8 Commits • 3 Features

Oct 1, 2025

October 2025 monthly summary for trezor-suite focusing on expanding end-to-end testing capabilities, stabilizing E2E workflows, and introducing desktop recovery coverage. Delivered Android E2E test infrastructure with node-bridge support and T3W1 emulator model, CI/workflow updates for Currents reporting, and enhanced test metadata (including T2T1 tag) plus E2E passphrase configuration in Suite native tests. Improved E2E reliability using translation-key based setup completion messages and a test environment workaround to bypass T3W1 authenticity checks to keep tests progressing across models. Launched Dry Run Recovery End-to-End Tests for the Desktop core to validate device reconnection and recovery after page reload. Introduced SecurityCodeInput and DigitBox UI components, refining end-to-end tests for security code interactions and improving maintainability. These efforts expand test coverage, reduce flaky tests, accelerate feedback loops, and strengthen confidence in new hardware model support and security workflows.

September 2025

14 Commits • 4 Features

Sep 1, 2025

September 2025 monthly summary for trezor-suite: Focused on reducing test flakiness, expanding CI coverage, and strengthening onboarding across T3W1/T3T1. Delivered reliable trading fixtures for end-to-end tests, enhanced Detox-based E2E infrastructure and CI pipelines for Android/web, introduced model-aware onboarding with a ModelFixture, and extended E2E coverage for THP pairing. Added test utilities to standardize interactions and parsing. Result: lower release risk, faster validation cycles, and broader device/model coverage.

August 2025

4 Commits • 1 Features

Aug 1, 2025

Month: 2025-08 — trezor/trezor-suite: Stabilized CI and expanded end-to-end testing for T3W1, delivering broader coverage and cleaner pipelines that enable faster feedback and more reliable builds. Key outcomes include CI stability through a controlled trezor-user-env downgrade, parametrized E2E tests for T3W1, Android E2E emulator support, and standardized pipeline naming to improve traceability.

July 2025

6 Commits • 1 Features

Jul 1, 2025

July 2025 monthly summary for trezor-suite focusing on improving end-to-end testing reliability and consolidating testing tooling. Core outcomes include stabilized E2E tests across devices and onboarding flows, and modernization of E2E tooling with a shared utilities package. These changes deliver faster, more reliable CI feedback and cross-environment consistency, enabling more frequent, safer releases.

June 2025

2 Commits

Jun 1, 2025

June 2025 — Trezor Suite CI reliability improvements focused on token generation flow and bot notification filtering. Delivered two targeted fixes to reduce flaky tests and notification spam in Android E2E, enabling faster feedback and more deterministic CI results.

May 2025

2 Commits • 2 Features

May 1, 2025

May 2025 monthly summary for trezor/trezor-suite focused on delivering reliable CI and strengthened UI test coverage. Implemented CI workflow changes to guarantee the web app build runs in every CI run, decoupling the web build from test outcomes. Enhanced end-to-end CSV transaction import UI tests by adding precise checks for displayed amounts and fiat values, increasing reliability and reducing false positives in test results.

April 2025

8 Commits • 2 Features

Apr 1, 2025

April 2025 — trezor-suite: Key features delivered include Currents-based CI E2E testing orchestration and reporting (parallel execution, skip-on-success, Currents fixtures, Android test sharding); CI permissions fix for E2E workflows (id-token, contents, PR write); and E2E test metadata system with manual test management (test case descriptions, PW filtering). Impact: faster, more reliable E2E pipelines; reduced noise in CI; broader test coverage via manual tests; improved test visibility and traceability. Technologies/skills: Currents orchestration, Android test strategies, GitHub Actions permissions, test metadata architecture, manual test management. Business value: accelerated feedback, safer releases, scalable testing architecture.

March 2025

15 Commits • 2 Features

Mar 1, 2025

March 2025: Consolidated improvements to end-to-end testing and CI/CD, delivering safer E2E coverage for account openings and transactions, plus modernization of the QA pipelines for clearer visibility and more reliable deployments. Key work centered on (1) End-to-End Testing Reliability and Canary Firmware Coverage, including safe account opening tests, transaction export refactor, address metadata labeling tests, canary firmware test support, test retries, and smoke test integration; and (2) CI/CD Infrastructure Modernization and Test Pipeline Stabilization, featuring modular QA pipelines, updated dependencies, improved deployment for firmware canary web tests, and enhanced PR feedback. Major bugs fixed encompassed flaky test failures, CORS/mocking issues, and metadata test reliability improvements. Overall impact: reduced test flakiness, safer firmware updates, faster feedback into PRs, and more deterministic release readiness. Technologies and skills demonstrated include Playwright-based E2E testing, test retries, canary firmware coverage, modular CI/CD refactoring, and improved test observability for faster, safer releases.

Activity

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Quality Metrics

Correctness89.6%
Maintainability86.8%
Architecture85.6%
Performance84.4%
AI Usage24.8%

Skills & Technologies

Programming Languages

BashJSONJavaScriptNode.jsShellTypeScriptYAMLbashmarkdown

Technical Skills

AI IntegrationAPI DevelopmentAPI IntegrationAPI developmentAPI integrationAWSAndroid DevelopmentAndroid TestingAndroid developmentAsynchronous ProgrammingAutomationBash ScriptingBuild OptimizationCI/CDCI/CD Configuration

Repositories Contributed To

1 repo

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

trezor/trezor-suite

Mar 2025 May 2026
15 Months active

Languages Used

BashJavaScriptNode.jsShellTypeScriptYAMLbashmarkdown

Technical Skills

Build OptimizationCI/CDCORS configurationConfiguration ManagementDependency ManagementDocker