LedgerHQ/ledger-live
Apr 2025 – Feb 2026
10 Months active
Languages Used
JavaScriptMarkdownTypeScriptYAMLJSON
Technical Skills
API DesignAPI DevelopmentAPI IntegrationAPI Integration TestingBackend DevelopmentBug Fix
Julien Nicoulaud
PROFILE
Julien Nicoulaud
Julien Nicoulaud contributed to LedgerHQ/ledger-live by building and refining blockchain integration features, focusing on transaction reliability and cross-chain compatibility. He engineered robust API layers and backend modules for assets like Tezos, Stellar, SUI, and Hedera, addressing edge cases in fee estimation, transaction crafting, and error handling. Using TypeScript and JavaScript, Julien improved test coverage, enforced minimum fees, and enhanced data modeling to reduce user-facing errors and operational risk. His work included optimizing EVM balance fetching, supporting new currencies, and maintaining backward compatibility. The depth of his engineering ensured stable releases and a resilient, scalable codebase for Ledger Live.
Overall Statistics
Feature vs Bugs
61%Features
Repository Contributions
142Total
Bugs
21
Commits
142
Features
33
Lines of code
54,470
Activity Months10
Your Network
256 people
Work History
February 2026
6 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for Ledger Live (LedgerHQ/ledger-live). Focused on Tezos fee estimation and transaction crafting improvements across complex operation types. Delivered robust fee estimation for reveal and delegation, enforced minimum fees, supported unrevealed accounts and custom fees, and expanded test coverage. Fixed critical bugs that under-estimated Tezos fees and did not respect minimums. These changes reduce user transaction failures, improve fee predictability, and strengthen transactional safety for Tezos operations. Demonstrated strengths in debugging, edge-case handling, and test-driven development, with commits including fixes for underestimation (TSD-8985), minimum-fee enforcement (TSD-8995), coverage improvements, and custom-fee support.
6 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for Ledger Live (LedgerHQ/ledger-live). Focused on Tezos fee estimation and transaction crafting improvements across complex operation types. Delivered robust fee estimation for reveal and delegation, enforced minimum fees, supported unrevealed accounts and custom fees, and expanded test coverage. Fixed critical bugs that under-estimated Tezos fees and did not respect minimums. These changes reduce user transaction failures, improve fee predictability, and strengthen transactional safety for Tezos operations. Demonstrated strengths in debugging, edge-case handling, and test-driven development, with commits including fixes for underestimation (TSD-8985), minimum-fee enforcement (TSD-8995), coverage improvements, and custom-fee support.
February 2026
January 2026
22 Commits • 5 Features
Jan 1, 2026January 2026 monthly summary for Ledger Live: Focused on reliability, interoperability, and scalability. Key deliverables include Hedera block immutability and lastBlock finalization fixes; Hedera ERC20 transfers to EVM addresses with comprehensive tests, fixtures, snapshots, and address resolution improvements; addition of several new EVM currencies; updated test snapshots and README; and tooling stabilization by reverting unintended changes, aligning with blockscoutExplorerView, addressing RSK EIP-1191 address validation, and NaN-to-BigInt edge cases. These workstreams collectively improve cross-chain compatibility, reduce runtime risk, and create a stronger base for future Hedera integration and currency support.
January 2026
22 Commits • 5 Features
Jan 1, 2026January 2026 monthly summary for Ledger Live: Focused on reliability, interoperability, and scalability. Key deliverables include Hedera block immutability and lastBlock finalization fixes; Hedera ERC20 transfers to EVM addresses with comprehensive tests, fixtures, snapshots, and address resolution improvements; addition of several new EVM currencies; updated test snapshots and README; and tooling stabilization by reverting unintended changes, aligning with blockscoutExplorerView, addressing RSK EIP-1191 address validation, and NaN-to-BigInt edge cases. These workstreams collectively improve cross-chain compatibility, reduce runtime risk, and create a stronger base for future Hedera integration and currency support.
November 2025
19 Commits • 1 Features
Nov 1, 2025November 2025 monthly summary for LedgerHQ/ledger-live focusing on delivering a unified transaction failure status, stabilizing Tezos fee estimation workflow with improved logging, and refreshing test data for Stellar/Polkadot integration tests. These efforts improve user-facing history accuracy, transaction reliability across coin modules, and overall test coverage and resilience.
19 Commits • 1 Features
Nov 1, 2025November 2025 monthly summary for LedgerHQ/ledger-live focusing on delivering a unified transaction failure status, stabilizing Tezos fee estimation workflow with improved logging, and refreshing test data for Stellar/Polkadot integration tests. These efforts improve user-facing history accuracy, transaction reliability across coin modules, and overall test coverage and resilience.
November 2025
October 2025
2 Commits
Oct 1, 2025Month: 2025-10 | LedgerHQ/ledger-live: Strengthened transaction reliability and user trust by fixing critical edge-cases in XRP and TronGrid integrations. Delivered targeted fixes with test coverage and improved validation and error handling, leading to more robust crafting/validation logic, clearer telemetry, and reduced risk of failed or misprocessed transactions.
October 2025
2 Commits
Oct 1, 2025Month: 2025-10 | LedgerHQ/ledger-live: Strengthened transaction reliability and user trust by fixing critical edge-cases in XRP and TronGrid integrations. Delivered targeted fixes with test coverage and improved validation and error handling, leading to more robust crafting/validation logic, clearer telemetry, and reduced risk of failed or misprocessed transactions.
September 2025
34 Commits • 13 Features
Sep 1, 2025September 2025 monthly summary for LedgerHQ/ledger-live focused on BACK-9645-related enhancements, reliability improvements, and performance gains. Delivered end-to-end features in AlpacaApi craftTransaction, aligned Alpaca bridge with new craftTransaction behavior, expanded test coverage and boilerplate, and upgraded dependencies for stability and maintainability. Resulting improvements include better transaction construction visibility, stronger cross-service integration, faster EVM balance fetches, and improved release readiness and code quality.
34 Commits • 13 Features
Sep 1, 2025September 2025 monthly summary for LedgerHQ/ledger-live focused on BACK-9645-related enhancements, reliability improvements, and performance gains. Delivered end-to-end features in AlpacaApi craftTransaction, aligned Alpaca bridge with new craftTransaction behavior, expanded test coverage and boilerplate, and upgraded dependencies for stability and maintainability. Resulting improvements include better transaction construction visibility, stronger cross-service integration, faster EVM balance fetches, and improved release readiness and code quality.
September 2025
August 2025
7 Commits • 2 Features
Aug 1, 2025August 2025 Ledger Live monthly summary: Focused on stabilizing Stellar integration, laying groundwork for Canton staking/rewards, and improving UI memo rendering to enhance user experience and reduce regression risk. Key outcomes include test data drift fixes for Stellar bridge, API scaffolding for staking/rewards, and UI/memo rendering improvements with backward compatibility.
August 2025
7 Commits • 2 Features
Aug 1, 2025August 2025 Ledger Live monthly summary: Focused on stabilizing Stellar integration, laying groundwork for Canton staking/rewards, and improving UI memo rendering to enhance user experience and reduce regression risk. Key outcomes include test data drift fixes for Stellar bridge, API scaffolding for staking/rewards, and UI/memo rendering improvements with backward compatibility.
July 2025
29 Commits • 8 Features
Jul 1, 2025July 2025 monthly work summary for LedgerHQ/ledger-live: Key features delivered include ALPACA API Core Migration and Block Modeling, SUI block retrieval, and the Draft Transaction Model. Major bugs fixed include XRP memo crafting issue and SUI token mapping edge cases, plus memo/UI changes. The work improved API reliability, data accessibility for blocks/transactions, and transaction handling, with substantial quality improvements through linting, tests, and governance updates. Technologies demonstrated include ALPACA API, SUI integration, TypeScript/JavaScript, linting and test-driven development, and Cloud Wallet code ownership governance.
29 Commits • 8 Features
Jul 1, 2025July 2025 monthly work summary for LedgerHQ/ledger-live: Key features delivered include ALPACA API Core Migration and Block Modeling, SUI block retrieval, and the Draft Transaction Model. Major bugs fixed include XRP memo crafting issue and SUI token mapping edge cases, plus memo/UI changes. The work improved API reliability, data accessibility for blocks/transactions, and transaction handling, with substantial quality improvements through linting, tests, and governance updates. Technologies demonstrated include ALPACA API, SUI integration, TypeScript/JavaScript, linting and test-driven development, and Cloud Wallet code ownership governance.
July 2025
June 2025
3 Commits
Jun 1, 2025June 2025 monthly summary for LedgerHQ/ledger-live focused on reliability and data fidelity in cross-chain coin modules (Tezos and Stellar). Delivered critical bugs fixes in Tezos encoding/parsing and Stellar core operation handling, with enhanced test coverage and traceability. Achieved measurable improvements in compatibility, signing reliability, and data fidelity, contributing to a smoother production experience for users interacting with Tezos and Stellar assets.
June 2025
3 Commits
Jun 1, 2025June 2025 monthly summary for LedgerHQ/ledger-live focused on reliability and data fidelity in cross-chain coin modules (Tezos and Stellar). Delivered critical bugs fixes in Tezos encoding/parsing and Stellar core operation handling, with enhanced test coverage and traceability. Achieved measurable improvements in compatibility, signing reliability, and data fidelity, contributing to a smoother production experience for users interacting with Tezos and Stellar assets.
May 2025
3 Commits • 1 Features
May 1, 2025In 2025-05, LedgerHQ/ledger-live focused on reliability and performance improvements in the coin-modules with targeted fixes for Tezos and optimized Stellar querying. The work delivered clearer fee handling, stronger test alignment, and reduced server load through query optimization, contributing to a more reliable user experience and lower operational risk.
3 Commits • 1 Features
May 1, 2025In 2025-05, LedgerHQ/ledger-live focused on reliability and performance improvements in the coin-modules with targeted fixes for Tezos and optimized Stellar querying. The work delivered clearer fee handling, stronger test alignment, and reduced server load through query optimization, contributing to a more reliable user experience and lower operational risk.
May 2025
April 2025
17 Commits • 2 Features
Apr 1, 2025April 2025 delivered a focused set of features and reliability fixes across Ledger Live modules, strengthening API resilience, HSM readiness, and cross-coin workflows. Key work included Tezos fee estimation error handling, Stellar Vault HSM compatibility, XRP crafting with sender context, and Tron balance/broadcast improvements. The changes increased system reliability, reduced customer-facing errors, and expanded test coverage with explicit changesets to streamline deployments.
April 2025
17 Commits • 2 Features
Apr 1, 2025April 2025 delivered a focused set of features and reliability fixes across Ledger Live modules, strengthening API resilience, HSM readiness, and cross-coin workflows. Key work included Tezos fee estimation error handling, Stellar Vault HSM compatibility, XRP crafting with sender context, and Tron balance/broadcast improvements. The changes increased system reliability, reduced customer-facing errors, and expanded test coverage with explicit changesets to streamline deployments.
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Quality Metrics
Correctness93.4%
Maintainability90.4%
Architecture89.0%
Performance87.4%
AI Usage20.8%
Skills & Technologies
Programming Languages
JSONJavaScriptMarkdownTypeScriptYAML
Technical Skills
API DesignAPI DevelopmentAPI IntegrationAPI Integration TestingAPI TestingAPI developmentAPI integrationAsynchronous ProgrammingBackend DevelopmentBackend developmentBackward CompatibilityBlockchainBlockchain API DevelopmentBlockchain DevelopmentBlockchain Integration
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