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Michal Vaněk

PROFILE

Michal Vaněk

Over thirteen months, contributed to trezor/trezor-suite, grafana/k6-DefinitelyTyped, and DefinitelyTyped/DefinitelyTyped by building and refining trading, blockchain, and API integration features. Developed frontend and full stack solutions in TypeScript and JavaScript, focusing on trading workflows, DEX data signing, and configuration management. Enhanced reliability and security by improving password generation, refining API type definitions, and supporting Ethereum testnets. Addressed bugs affecting data integrity and user experience, such as trading form validation and signing errors. Collaborated across repositories to align API contracts, streamline onboarding, and enable robust testing, demonstrating strengths in React, Redux, and state management for complex financial applications.

Overall Statistics

Feature vs Bugs

70%Features

Repository Contributions

26Total
Bugs
7
Commits
26
Features
16
Lines of code
1,531
Activity Months13

Work History

June 2026

1 Commits • 1 Features

Jun 1, 2026

June 2026 monthly summary for DefinitelyTyped/DefinitelyTyped focusing on API contract evolution and test stabilization. Implemented support for recipient data in buy quote flows by adding receiveAddress to the BuyTradeQuoteRequest interface and updating tests. This enables more accurate and reliable trade quotes for downstream integrations, reducing order routing errors and data gaps.

May 2026

1 Commits • 1 Features

May 1, 2026

May 2026: Key feature delivered for DefinitelyTyped/DefinitelyTyped – Bitcoin swap configuration data scaffolding, including dummy OP_RETURN data and swap fee percentage. Implemented and merged via PR #75050 (commit 8e21caa80421069194688b43c5aa294538803485). No major bugs fixed this month; focus centered on feature delivery, data modeling, and test readiness. Impact: enables end-to-end testing and smoother downstream integration of crypto swap features; improves configuration management and traceability. Technologies/skills demonstrated: TypeScript/data modeling, Git PR workflows, cross-repo collaboration, test data management, and Invity API integration planning.

January 2026

2 Commits • 1 Features

Jan 1, 2026

January 2026: trezor/trezor-suite delivered SLIP-24 integration for Trezor payment requests in the trading module as an experimental feature. Implemented feature state management via updated hooks and selectors, added internationalization for the feature title and description, and fixed SLIP-44 identifier issues to ensure correct path validation and smoother payment request creation. The work improves signing clarity, reduces request errors, and positions the trading module for broader SLIP-24 adoption.

December 2025

1 Commits

Dec 1, 2025

December 2025 monthly summary for trezor-suite: Stabilized the trading signing flow by fixing the Slip-24 signing error, improving correctness of key usage and addresses in payment requests. This targeted fix reduces signing failures and increases reliability of trading transactions. Commit highlight: de88c57accc488a02246114e9a651e5e4d942538.

October 2025

3 Commits • 2 Features

Oct 1, 2025

Monthly summary for 2025-10 focusing on delivering user-guided DCA trading enhancements, environment stabilization for Invity API, and API type improvements enabling DEX operations. Efforts spanned trezor-suite and grafana/k6-DefinitelyTyped, driving user clarity, reliability, and developer velocity.

September 2025

1 Commits • 1 Features

Sep 1, 2025

September 2025 monthly summary for grafana/k6-DefinitelyTyped focused on API typing improvements for trade quotes. Key feature delivered: optional receiveAddress support added to ExchangeTradeQuoteRequest in the invity-api type definitions, enabling specifying a receiving address when requesting a trade quote. Corresponding tests updated to cover the new field. Change merged with commit 19e3867d47d0a1664164ad0da49e52f4c8f7de7a (PR #73748).

July 2025

3 Commits • 2 Features

Jul 1, 2025

July 2025 (trezor-suite) delivered targeted UI refinements and reliability improvements that enhance user clarity, protect data integrity, and streamline trading flows. Key features and fixes implemented across the trezor-suite repo: 1) Confirm Address Modal Heading Enhancement: dynamically display asset symbol and network name in the Confirm Address modal heading, selecting the heading based on the transaction type (specific cryptocurrency, token on a network, or general network receive) to provide clearer context during address confirmation. Commit: c3154b5f664b45ccf563d85c306f311664423c2e. 2) Trading Form Flow Improvement: refactor trading form to set the form step after the selected quote; handle the 'sell' context by aligning the provider flow for bank account transactions while preserving existing exchange context logic, resulting in a smoother and more accurate user journey. Commit: bb7265c01045d8e4d26605d89aa73f262f7ca490. 3) Trading During Discovery Prevention: disable trading during discovery to prevent conflicts or data inconsistencies; added isDiscoveryRunning checks across trading components, disabled relevant actions, and surfaced a warning to the user. Commit: 781770b2f90c040b228504f44334a0a3850cd8e5. Overall impact: improved user clarity in address confirmation, strengthened data integrity during discovery, and a more intuitive trading flow. These changes reduce missteps, lower risk during asynchronous discovery, and demonstrate strong cross-component coordination. Skills demonstrated include UI/UX enhancements, state-driven UI, conditional rendering, robust gating logic, and commit-driven development.

June 2025

2 Commits • 2 Features

Jun 1, 2025

June 2025 highlights: Delivered focused features across two repositories, enhancing the OTC trading UX in Trezor Suite and clarifying DEX flows in invity-api typings. The month prioritized feature delivery and code quality improvements, with targeted testing to validate new API surface.

May 2025

3 Commits • 1 Features

May 1, 2025

May 2025 monthly summary for trezor-suite: Focused on device-wallet scoped trading insights, tightening data integrity, and improving UX for trading workflows. Key features delivered include Trading Transaction History Filtering (scoped to the selected wallet/device) and UI data fetch update to reflect the focused view. Major bugs fixed include hiding trading offers when the trading form is invalid to prevent interactions with erroneous options, and preserving the original trade date on save to maintain data integrity. These changes enhance business value by delivering accurate, device-specific trading data, reducing user errors, and strengthening trust in trading workflows. Technologies/skills demonstrated include UI state management with device-scoped data fetching, robust form validation, and careful data mutation with preserved historical data. Commit highlights: 716856893214831011b52b9f5ebfbc2f56b7752e, 401047ab9bf8ef529eb2eeb6054e1a57f4713c84, c818bc8453b5ef7128a150c200307b51cc537da7.

April 2025

2 Commits • 1 Features

Apr 1, 2025

Month: 2025-04 | Scope: trezor/trezor-suite trading module Key outcomes: - Implemented Ethereum testnet support for Holesky and Sepolia within the trading feature by updating network configurations and testnet identifiers, enabling end-to-end testing and interaction with these networks in trading workflows. - Committed changes with clear messages documenting feature work and testnet support across two commits. - Prepared the codebase for expanded testnet coverage, improving QA readiness and future reliability of trading on Ethereum testnets.

March 2025

1 Commits • 1 Features

Mar 1, 2025

March 2025 highlights for trezor-suite: Delivered the Trading Interface Redirect-based pre-population feature, enabling auto-filled buy/sell forms from redirect URL params. Rolled out a fix to reliably show offers via redirect URLs (commit: fix(trading): show offers by redirect url params), improving accuracy of pre-filled data. Impact: smoother onboarding and faster time-to-first-trade, with reduced manual entry and fewer user errors. Technologies/skills demonstrated: URL parameter parsing, routing integration, UI state management, testing and validation in the trading workflow.

February 2025

4 Commits • 2 Features

Feb 1, 2025

February 2025 monthly summary for grafana/k6-DefinitelyTyped development. Focused on enabling data signing for DEX trades, improving trade tagging for better analytics, and tightening governance ownership in the repository.

November 2024

2 Commits • 1 Features

Nov 1, 2024

November 2024 performance summary across two repositories: bitwarden/clients and grafana/k6-DefinitelyTyped. Focused on reliability, security, and developer experience. Delivered targeted fixes and TypeScript-definition improvements that enable safer integrations and reduce operational risk.

Activity

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Quality Metrics

Correctness93.0%
Maintainability92.4%
Architecture92.4%
Performance89.2%
AI Usage21.6%

Skills & Technologies

Programming Languages

JavaScriptTypeScript

Technical Skills

API DevelopmentAPI IntegrationBlockchainBlockchain DevelopmentConfiguration ManagementCore LibrariesData StructuresFront End DevelopmentFrontend DevelopmentFull Stack DevelopmentLocalizationPassword GenerationReactReduxSecurity

Repositories Contributed To

4 repos

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

trezor/trezor-suite

Mar 2025 Jan 2026
8 Months active

Languages Used

JavaScriptTypeScript

Technical Skills

Frontend DevelopmentReactState ManagementTypeScriptURL HandlingBlockchain

grafana/k6-DefinitelyTyped

Nov 2024 Oct 2025
5 Months active

Languages Used

TypeScript

Technical Skills

API DevelopmentType DefinitionsTypeScriptData Structures

DefinitelyTyped/DefinitelyTyped

May 2026 Jun 2026
2 Months active

Languages Used

TypeScript

Technical Skills

API DevelopmentTestingTypeScript

bitwarden/clients

Nov 2024 Nov 2024
1 Month active

Languages Used

TypeScript

Technical Skills

Core LibrariesPassword GenerationSecurity