Worked on embedded development for cryptocurrency wallets, focusing on stability and compatibility across two repositories. In LedgerHQ/ledger-app-database, performed routine maintenance by updating IOTA application dependencies using C, ensuring the project remained compatible with the latest IOTA ecosystem without introducing user-facing changes. This approach reduced technical debt and maintained backward compatibility, verified through continuous integration and validation tests. Later, contributed to KeystoneHQ/keystone3-firmware by implementing IOTA chain type support in the hardware wallet derivation path, mapping IOTA to the correct BIP44 path. Leveraged C and Rust to expand hardware wallet functionality, emphasizing maintainability and precise traceability in all changes.