• Work as a core contributor to the Blockstream Jade firmware, writing robust, secure C/Python code within a small, agile team. • Extend and optimize our support for advanced signing protocols such as taproot, atomic swaps, and simplicity. • Design and implement features like air-gapped camera signing, cryptographic primitives, and secure communication protocols. • Develop optimized solutions to work within a resource constrained execution environment. • Contribute to a transparent, open source codebase where your work is visible to the entire Bitcoin community.