Company Description
Block is one company built from many blocks, all united by the same purpose of economic empowerment. The blocks that form our foundational teams - People, Finance, Counsel, Hardware, Information Security, Platform Infrastructure Engineering, and more - provide support and guidance at the corporate level. They work across business groups and around the globe, spanning time zones and disciplines to develop inclusive People policies, forecast finances, give legal counsel, safeguard systems, nurture new initiatives, and more. Every challenge creates possibilities, and we need different perspectives to see them all. Bring yours to Block.
Job Description
Proto is accelerating the world's transition to an open economy with products that increase access and independence for everyone. We're building Bitkey, a simple and safe self-custody bitcoin wallet that will put customers in control, as well as hardware and software that will help decentralize bitcoin mining and enable new and innovative use cases for bitcoin mining. We're developing these products in the open - you can read more about them at bitkey.build and mining.build
Within Proto, our Bitcoin Products team delivers the product and go-to-market strategy, software, firmware, and custom silicon needed to make Bitkey and our ambitious mining initiatives a reality. Come build the future of money with us!
Qualifications
As Security and Privacy Lead, you will:

• Define our security and privacy roadmap in collaboration with engineering, operations, design, and business functions
• Build and evaluate threat models across all aspects of the product
• Develop security and privacy features from design through delivery
• Work with and through internal and external experts in a broad range of engineering domains critical to the security of our product, spanning firmware, mobile, backend, frontend, and more
• Engage with the external community of experts, developers, and potential customers to inform, vet, and test our approach

You have:

• Expertise in identifying and prioritizing security threats across multiple domains
• Expertise in applied cryptography and key management
• Demonstrated ability to navigate difficult tradeoffs between security, privacy, and customer experience goals
• Experience shipping products, ideally including experience developing in both backend and either mobile or hardware domains
• Collaborative approach to developing and communicating with colleagues across business, engineering, and operations disciplines
• Deep understanding of bitcoin internals, or an interest in learning quickly in this area

Qualifications
As Security and Privacy Lead, you will:

• Define our security and privacy roadmap in collaboration with engineering, operations, design, and business functions
• Build and evaluate threat models across all aspects of the product
• Develop security and privacy features from design through delivery
• Work with and through internal and external experts in a broad range of engineering domains critical to the security of our product, spanning firmware, mobile, backend, frontend, and more
• Engage with the external community of experts, developers, and potential customers to inform, vet, and test our approach

You have:

• Expertise in identifying and prioritizing security threats across multiple domains
• Expertise in applied cryptography and key management
• Demonstrated ability to navigate difficult tradeoffs between security, privacy, and customer experience goals
• Experience shipping products, ideally including experience developing in both backend and either mobile or hardware domains
• Collaborative approach to developing and communicating with colleagues across business, engineering, and operations disciplines
• Deep understanding of bitcoin internals, or an interest in learning quickly in this area