Senior Firmware Engineer
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Job Description
Senior Firmware Engineer developing and securing firmware for Blockstream's Jade hardware wallet. Collaborating with a team on Bitcoin security and innovative signing protocols.
Responsibilities:
- 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.
Requirements:
- Proven track record in C/C++ development for microcontrollers with real world esp32/esp32s specific experience.
- Solid understanding of Bitcoin internals, with a specific focus on Taproot, SegWit, and PSBTs.
- Experience with secure boot, memory protection, and defending against software based and side-channel attacks.
- Comfortable working with peripherals (cameras, screens) and low-level protocols (SPI, I2C, UART).
- An active GitHub presence with contributions to open-source projects is highly preferred.
Benefits:
- Health insurance
- Flexible work arrangements
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