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!
The Role
With Proto, we're building hardware and software that will help decentralize bitcoin mining, promote new and innovative use cases for bitcoin mining, and drive a major new business for Block. We're looking for a Post-Silicon Lead who will drive productization of our bitcoin mining chips.
You will:

• Bring Proto silicon from first samples to mass production
• Develop and implement test strategies that lead to better performance and faster delivery
• Collect and analyze both wafer-level and bench test data and collaborate with data scientists to characterize and optimize silicon performance
• Work with foundry to identify potential device parameter changes to enable efficient low-voltage operation and maximize performance
• Collaborate with hardware system engineers to determine appropriate binning strategies and to design systems that get the most out of the individual and collective ASIC performance
• Collaborate with ASIC design engineers to improve test capabilities at a silicon level and to inform what device improvements could improve circuit performance and energy efficiency
• Lead a small team of test engineers to deliver on the responsibilities in this job description

You have:

• 10 + years of post-education experience in fab or fabless environments, technology definition and bring-up, device/process architecture, and NPI
• Experience with near-threshold operation (and bitcoin mining specifically is a huge plus)
• Experience with CP, FT, and bench test data collection and analysis - and ability and willingness to get your hands dirty on all of these activities
• Bias to action - if it needs doing, you're already working on it, and with the right level of scrappiness for the task
• An effective technical leadership approach and ability to inspire and develop great engineers
• Deep understanding of SPICE fundamentals, simulation methodologies, and BSIM FinFET models

We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances.
We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page .
While there is no specific deadline to apply for this role, U.S. roles are typically open for an average of 55 days before being filled by a successful candidate. Please refer to the date listed at the top of this job page for when this role was first posted.
Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate's starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.
To find a location's zone designation, please refer to this resource . If a location of interest is not listed, please speak with a recruiter for additional information.
Zone A:
$251,600 - $377,400 USD
Zone B:
$251,600 - $377,400 USD
Zone C:
$251,600 - $377,400 USD
Zone D:
$251,600 - $377,400 USD
Application Guidelines
Candidates may submit up to 9 active applications within a 60-day period. Reapplications to the same role are accepted 90 days after a previous application has been reviewed.
Use of AI in Our Hiring Process
We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws.
Contact us here with hiring practice or data usage questions.
Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block.
Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone.