Senior Native Mobile Developer (Swift & Kotlin – BLE)

We are looking for a Senior Native Mobile Developer with deep expertise in Swift and Kotlin, and a strong understanding of BLE (Bluetooth Low Energy) communications to join our team. This role will play a key part in building and integrating our MPC (Multi-Party Computation) Crypto Wallet solution with a secure hardware device that communicates with the mobile application via BLE. You will work closely with cryptography engineers, firmware teams, and backend developers to embed MPC protocols into the mobile app, define and test mobile-side communication protocols, and ensure a secure and seamless user experience between the wallet and the embedded hardware. Key Responsibilities Implement and maintain native iOS (Swift) and Android (Kotlin) components of our MPC wallet solution. Integrate cryptographic SDKs and MPC libraries to support MPC core functions such as secure key share generation, signing, and transaction flows. Develop and optimize BLE communication between the mobile app and the secure hardware component, including pairing, GATT services, and encrypted data transmission. Collaborate with firmware teams to define packet structures, command sets, and device-side state machines. Ensure mobile security best practices, including biometric authentication, secure local storage, sandboxing, and encrypted communication channels. Build clean, well-tested, and maintainable code that aligns with our cross-platform architecture and performance goals. Work closely with QA to implement robust test coverage, particularly around BLE and MPC integration. Participate in design reviews, code reviews, and contribute to cross-functional discussions and continuous improvement.