Worked on LedgerHQ/ledger-live, delivering end-to-end Speculos swap tests for SOL/USDC with added support for ETH_USDC. Used TypeScript and Solidity to expand test coverage for cross-asset swaps, introducing new account and currency enums to support evolving asset workflows. Scaffolded multi-scenario test cases, laying the foundation for broader swap functionality while documenting a flaky balance retrieval issue for future resolution. This approach improved release reliability and reduced risk by ensuring robust automated testing for new asset pairs. The work focused on E2E testing and Speculos integration, positioning the team to accelerate time-to-market for additional asset support in future releases.