Mixed Signal Designer

  • San Francisco, CA, USA
  • Employees can work remotely
  • Full-time

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

You will be part of the custom silicon team in Block that develops bitcoin mining ASIC.

You will:

  • Understand block level specifications and translate them into circuit-level specifications.
  • Design and simulation of mixed-signal blocks on the leading-edge technology node
  • Assist physical layout design of all essential circuits and have a thorough understanding of all layout requirements.
  • Present and participate in regular design reviews.
  • Prepare and maintain project documentation including general specification, circuit description, and evaluation plan
  • Analyze hardware product requirements and translate into silicon specifications.



You have:

  • Master of Science in Electrical Engineering
  • 5+ years of design experience in transistor-level and system level mixed signal design
  • Bitcoin related experience is a plus
  • FinFet design experience on 10nm or below
  • Excellent problem-solving, organizational and analytical skills are necessary .
  • Experience in design with Cadence Spectre, SpectreRF, AMS and Virtuoso.
  • Strong knowledge of Verilog-A & Matlab for system modeling and verification.
  • Understanding of digital ASIC design and design flow is an asset.
  • Experience with high volume IC manufacturing is a plus
  • Broad expertise in ASIC design, such as PLL, memory, IP integration
  • Experience as technical lead, driving all aspects of ASIC projects including: IC design, digital design, embedded FW, verification, and silicon validation.


Additional Information

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 a proud equal opportunity employer. We work hard to evaluate all employees and job applicants consistently, without regard to race, color, religion, gender, national origin, age, disability, veteran status, pregnancy, gender expression or identity, sexual orientation, citizenship, or any other legally protected class. 

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

Additionally, we consider qualified applicants with criminal histories for employment on our team, assessing candidates in a manner consistent with the requirements of the San Francisco Fair Chance Ordinance.


We want you to be well and thrive. Our global benefits package includes:

  • Healthcare coverage
  • Retirement Plans
  • Employee Stock Purchase Program
  • Wellness perks
  • Paid parental leave
  • Paid time off
  • Learning and Development resources

Block, Inc. (NYSE: SQ) is a global technology company with a focus on financial services. Made up of Square, Cash App, Spiral, TIDAL, and TBD54566975, we build tools to help more people access the economy. Square helps sellers run and grow their businesses with its integrated ecosystem of commerce solutions, business software, and banking services. With Cash App, anyone can easily send, spend, or invest their money in stocks or Bitcoin. Spiral (formerly Square Crypto) builds and funds free, open-source Bitcoin projects. Artists use TIDAL to help them succeed as entrepreneurs and connect more deeply with fans. TBD54566975 is building an open developer platform to make it easier to access Bitcoin and other blockchain technologies without having to go through an institution.

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