cake-tech/cake_wallet
Nov 2024 – Jan 2026
15 Months active
Languages Used
C++DartMarkdownShellJavaarbTypeScriptYAML
Technical Skills
Build System ConfigurationCI/CDCross-Platform DevelopmentFlutterFlutter DevelopmentHardware Wallet Integration
Konstantin Ullrich
PROFILE
Konstantin Ullrich
Konstantin Ullrich developed and maintained core features for the cake-tech/cake_wallet repository over 15 months, focusing on secure cryptocurrency management, hardware wallet integration, and cross-platform reliability. He engineered solutions for multi-wallet support, silent payments, and advanced address validation, leveraging Dart and Flutter to deliver robust mobile and desktop experiences. His work included integrating hardware wallets like Ledger, Trezor, and BitBox, refining transaction signing, and enhancing error handling for complex blockchain workflows. By implementing precise monetary calculations, localization, and rigorous unit testing, Konstantin ensured the wallet handled diverse assets and edge cases, resulting in a resilient, user-friendly, and maintainable codebase.
Overall Statistics
Feature vs Bugs
70%Features
Repository Contributions
84Total
Bugs
18
Commits
84
Features
42
Lines of code
23,798
Activity Months15
Your Network
32 peopleShared Repositories
32
Work History
January 2026
1 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary: Focused on hardening Bitcoin wallet hardware wallet compatibility in cake_wallet by refining Ledger integration, updating dependencies, and cleaning the signing path. Delivered improvements to derivation paths for custom Bitcoin Ledger accounts, updated ledger-bitcoin dependency, and removed an unused parameter in signTransaction, contributing to more reliable hardware wallet signing and a smoother user experience.
1 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary: Focused on hardening Bitcoin wallet hardware wallet compatibility in cake_wallet by refining Ledger integration, updating dependencies, and cleaning the signing path. Delivered improvements to derivation paths for custom Bitcoin Ledger accounts, updated ledger-bitcoin dependency, and removed an unused parameter in signTransaction, contributing to more reliable hardware wallet signing and a smoother user experience.
January 2026
December 2025
7 Commits • 3 Features
Dec 1, 2025December 2025 (cake-wallet: cake-tech/cake_wallet) delivered key security, reliability, and UX improvements across silent payments, address management, amount formatting, and hardware workflows. Focused efforts on hardening silent payments with robust derivation paths, a master HD wallet integration, and RBF prevention; improved silent payments address lifecycle to avoid stale records; tightened crypto amount display precision and simplified formatting for clarity; added visibility of Tor status in support chats; strengthened ledger connection handling and exception paths; and corrected wallet hardware restore account indexing to prevent off-by-one errors. These changes collectively enhance security, reduce support friction, and improve user confidence in complex transaction and hardware flows.
December 2025
7 Commits • 3 Features
Dec 1, 2025December 2025 (cake-wallet: cake-tech/cake_wallet) delivered key security, reliability, and UX improvements across silent payments, address management, amount formatting, and hardware workflows. Focused efforts on hardening silent payments with robust derivation paths, a master HD wallet integration, and RBF prevention; improved silent payments address lifecycle to avoid stale records; tightened crypto amount display precision and simplified formatting for clarity; added visibility of Tor status in support chats; strengthened ledger connection handling and exception paths; and corrected wallet hardware restore account indexing to prevent off-by-one errors. These changes collectively enhance security, reduce support friction, and improve user confidence in complex transaction and hardware flows.
November 2025
7 Commits • 4 Features
Nov 1, 2025November 2025: Delivered targeted enhancements across cake_wallet, focusing on security, localization, correctness of numeric parsing, and currency-specific UX. Key outcomes include localization consistency for German terms, more robust fixed-point parsing with additional unit tests, migration-time wallet seed backups, a Windows path override for reliable DB storage, and currency-aware amount validation improvements. Together these changes reduce user errors, strengthen data integrity, and enable safer multi-currency usage.
7 Commits • 4 Features
Nov 1, 2025November 2025: Delivered targeted enhancements across cake_wallet, focusing on security, localization, correctness of numeric parsing, and currency-specific UX. Key outcomes include localization consistency for German terms, more robust fixed-point parsing with additional unit tests, migration-time wallet seed backups, a Windows path override for reliable DB storage, and currency-aware amount validation improvements. Together these changes reduce user errors, strengthen data integrity, and enable safer multi-currency usage.
November 2025
October 2025
8 Commits • 4 Features
Oct 1, 2025Month 2025-10 highlights: Expanded secure crypto management by adding multi-wallet hardware support (BitBox, Trezor, Ledger Nano Gen 5) with updated wallet services and dependencies; integrated Onramper signature retrieval into buy/transfer flows; refreshed UI/UX for device connection and support pages; and improved Node Management UX with refactored creation/edit flows. A notable bug fix included resolving the iOS node QR issue. These deliveries reduce onboarding friction, enhance security posture, and improve transactional reliability across wallet workflows.
October 2025
8 Commits • 4 Features
Oct 1, 2025Month 2025-10 highlights: Expanded secure crypto management by adding multi-wallet hardware support (BitBox, Trezor, Ledger Nano Gen 5) with updated wallet services and dependencies; integrated Onramper signature retrieval into buy/transfer flows; refreshed UI/UX for device connection and support pages; and improved Node Management UX with refactored creation/edit flows. A notable bug fix included resolving the iOS node QR issue. These deliveries reduce onboarding friction, enhance security posture, and improve transactional reliability across wallet workflows.
September 2025
9 Commits • 2 Features
Sep 1, 2025September 2025: Delivered substantive user-facing features, stability improvements, and cross-platform performance enhancements for cake_wallet. Key outcomes include expanded DFX Buy and Monero integration, improved error handling and asset/currency support, precision improvements for EVM amounts, a performance-oriented MWeb refactor via FFI, ongoing PayJoin/Flutter compatibility maintenance, and the addition of Wrapped BTC tokens with associated token registration. These efforts reduce error rates, improve transaction accuracy, broaden supported assets, and position the wallet for scalable growth.
9 Commits • 2 Features
Sep 1, 2025September 2025: Delivered substantive user-facing features, stability improvements, and cross-platform performance enhancements for cake_wallet. Key outcomes include expanded DFX Buy and Monero integration, improved error handling and asset/currency support, precision improvements for EVM amounts, a performance-oriented MWeb refactor via FFI, ongoing PayJoin/Flutter compatibility maintenance, and the addition of Wrapped BTC tokens with associated token registration. These efforts reduce error rates, improve transaction accuracy, broaden supported assets, and position the wallet for scalable growth.
September 2025
August 2025
4 Commits • 2 Features
Aug 1, 2025August 2025 (cake-tech/cake_wallet) focused on delivering price accuracy, reliability, and expanded currency coverage to support business growth. Three key items delivered across the repo: a currency override feature for fiat conversion, Ledger error handling improvements, and Zano support across DFX Buy and Open CryptoPay with wallet signing refactor and parameter corrections.
August 2025
4 Commits • 2 Features
Aug 1, 2025August 2025 (cake-tech/cake_wallet) focused on delivering price accuracy, reliability, and expanded currency coverage to support business growth. Three key items delivered across the repo: a currency override feature for fiat conversion, Ledger error handling improvements, and Zano support across DFX Buy and Open CryptoPay with wallet signing refactor and parameter corrections.
July 2025
16 Commits • 11 Features
Jul 1, 2025July 2025 performance summary for cake_wallet. Delivered core feature enhancements across wallet synchronization visibility, crypto precision, Monero UX, Ethereum URI interoperability, and desktop hardware wallet support. These changes expand asset support, improve accuracy and reliability, and enhance operator tooling, contributing to reduced support overhead and smoother user experiences.
16 Commits • 11 Features
Jul 1, 2025July 2025 performance summary for cake_wallet. Delivered core feature enhancements across wallet synchronization visibility, crypto precision, Monero UX, Ethereum URI interoperability, and desktop hardware wallet support. These changes expand asset support, improve accuracy and reliability, and enhance operator tooling, contributing to reduced support overhead and smoother user experiences.
July 2025
June 2025
9 Commits • 4 Features
Jun 1, 2025June 2025 performance summary for cake-wallet (cake-tech/cake_wallet). Focused on delivering high-value features, robust reliability, and expanded cross-chain/payment capabilities while improving developer experience and security. Highlights include PayJoin enhancements, dEuro savings, Ledger connection reliability, enhanced address validation for multiple networks, and hardware wallet backup restoration integrity.
June 2025
9 Commits • 4 Features
Jun 1, 2025June 2025 performance summary for cake-wallet (cake-tech/cake_wallet). Focused on delivering high-value features, robust reliability, and expanded cross-chain/payment capabilities while improving developer experience and security. Highlights include PayJoin enhancements, dEuro savings, Ledger connection reliability, enhanced address validation for multiple networks, and hardware wallet backup restoration integrity.
May 2025
7 Commits • 3 Features
May 1, 2025May 2025 monthly summary for cake-tech/cake_wallet focusing on reliability, UX improvements, and ecosystem expansion. Delivered critical seed restoration fixes, PayJoin integration, DEURO token support, and Ledger integration enhancements, driving user trust, lower error rates, and broader wallet capabilities.
7 Commits • 3 Features
May 1, 2025May 2025 monthly summary for cake-tech/cake_wallet focusing on reliability, UX improvements, and ecosystem expansion. Delivered critical seed restoration fixes, PayJoin integration, DEURO token support, and Ledger integration enhancements, driving user trust, lower error rates, and broader wallet capabilities.
May 2025
April 2025
6 Commits • 3 Features
Apr 1, 2025April 2025 monthly summary for cake_wallet: Delivered key features and fixes across Ledger UX, Monero onboarding, and payment integration, driving improved usability, security, and business value. Highlights include: Ledger bottom-sheet send flow UI upgrade; Ledger reconnection title state fix; Monero BIP39 seed support with passphrase caching; Open CryptoPay integration with Monero support and mapping improvements. These efforts expanded supported flows, reduced onboarding friction, and improved transaction reliability. Tech stack highlights: UI/UX refactor, device flow engineering, seed phrase handling, secure caching, and payment integration.
April 2025
6 Commits • 3 Features
Apr 1, 2025April 2025 monthly summary for cake_wallet: Delivered key features and fixes across Ledger UX, Monero onboarding, and payment integration, driving improved usability, security, and business value. Highlights include: Ledger bottom-sheet send flow UI upgrade; Ledger reconnection title state fix; Monero BIP39 seed support with passphrase caching; Open CryptoPay integration with Monero support and mapping improvements. These efforts expanded supported flows, reduced onboarding friction, and improved transaction reliability. Tech stack highlights: UI/UX refactor, device flow engineering, seed phrase handling, secure caching, and payment integration.
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for cake_wallet: focused on delivering context-aware support enhancements and localization improvements, with clear business value in user support efficiency, accessibility, and maintainability.
2 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for cake_wallet: focused on delivering context-aware support enhancements and localization improvements, with clear business value in user support efficiency, accessibility, and maintainability.
March 2025
February 2025
3 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for cake-tech/cake_wallet. Focused on delivering reliability improvements, user-facing UX enhancements for hardware wallets, and better support context integration to reduce support friction. Notable work includes localization fix, hardware wallet integration enhancements, and app version context to Chatwoot for improved issue routing and customer support.
February 2025
3 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for cake-tech/cake_wallet. Focused on delivering reliability improvements, user-facing UX enhancements for hardware wallets, and better support context integration to reduce support friction. Notable work includes localization fix, hardware wallet integration enhancements, and app version context to Chatwoot for improved issue routing and customer support.
January 2025
1 Commits
Jan 1, 2025January 2025: Stabilized multi-wallet UX by addressing transaction clearance on wallet switch and strengthening component lifecycle. Refactored DashboardViewModel to a lazy singleton to ensure proper initialization, lifecycle management, and predictable behavior across wallet switches. This targeted fix reduces edge-case discrepancies and improves data integrity for cross-wallet transactions. Commit CW-855: 066eec2b26b50578be69be1c16229ac3155f3278 (#1973).
1 Commits
Jan 1, 2025January 2025: Stabilized multi-wallet UX by addressing transaction clearance on wallet switch and strengthening component lifecycle. Refactored DashboardViewModel to a lazy singleton to ensure proper initialization, lifecycle management, and predictable behavior across wallet switches. This targeted fix reduces edge-case discrepancies and improves data integrity for cross-wallet transactions. Commit CW-855: 066eec2b26b50578be69be1c16229ac3155f3278 (#1973).
January 2025
December 2024
2 Commits • 1 Features
Dec 1, 2024December 2024 performance update for cake_wallet (cake-tech/cake_wallet). Delivered reliability and UX enhancements for Ledger Monero hardware wallet integration, focusing on stable device connections, reliable transaction flow, and improved error handling. Implemented a 10-second device-detection prompt, a long-wait timer during connection, and refined disconnection/re-initiation flows to improve recoveries. These changes reduce user friction and support load while strengthening critical wallet interactions.
December 2024
2 Commits • 1 Features
Dec 1, 2024December 2024 performance update for cake_wallet (cake-tech/cake_wallet). Delivered reliability and UX enhancements for Ledger Monero hardware wallet integration, focusing on stable device connections, reliable transaction flow, and improved error handling. Implemented a 10-second device-detection prompt, a long-wait timer during connection, and refined disconnection/re-initiation flows to improve recoveries. These changes reduce user friction and support load while strengthening critical wallet interactions.
November 2024
2 Commits • 1 Features
Nov 1, 2024Concise monthly performance summary for 2024-11 focusing on cake-tech/cake_wallet. Highlights include delivery of Ledger hardware wallet support for Monero with Wownero compatibility, improvements to cross-platform wallet builds, and robustness enhancements to Ledger connections via BLE keep-alive improvements. These efforts increased security, expanded device compatibility, and improved reliability for end users. Also achieved code quality improvements and readiness for broader hardware wallet support in the wallet service.
2 Commits • 1 Features
Nov 1, 2024Concise monthly performance summary for 2024-11 focusing on cake-tech/cake_wallet. Highlights include delivery of Ledger hardware wallet support for Monero with Wownero compatibility, improvements to cross-platform wallet builds, and robustness enhancements to Ledger connections via BLE keep-alive improvements. These efforts increased security, expanded device compatibility, and improved reliability for end users. Also achieved code quality improvements and readiness for broader hardware wallet support in the wallet service.
November 2024
Activity
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Quality Metrics
Correctness87.2%
Maintainability85.2%
Architecture83.6%
Performance80.0%
AI Usage23.8%
Skills & Technologies
Programming Languages
ArbBatchfileC++DartGoICOJSONJavaKotlinMarkdown
Technical Skills
API IntegrationAPI integrationAddress ValidationAsset ManagementAsynchronous ProgrammingBIP39 StandardBackend DevelopmentBackend IntegrationBackup and RestoreBigInt HandlingBitcoinBlockchainBlockchain DevelopmentBluetoothBuild Automation
Repositories Contributed To
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