Foundry Interface Engineer
Block, Inc. is a global financial-technology company building products for economic empowerment across payments, consumer finance, commerce, Bitcoin, music, and AI.
Maintainer signals as of 9/25/2026
Projects
About Block, Inc.
Block, Inc., formerly Square, Inc., operates the Square and Cash App ecosystems and current businesses including Afterpay, TIDAL, Bitkey, Proto, and Spiral. Its current Bitcoin ecosystem includes Cash App Bitcoin services, Bitkey self-custody wallet technology, Proto mining systems, and Spiral open-source Bitcoin initiatives. Block also develops open-source AI and collaboration projects including Goose, Buzz, and Berd.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You will improve ASIC designs by analyzing silicon and production wafer data against design goals. You will collaborate with foundry partners, circuit designers, test engineers, and internal engineering teams to refine processes, validate data, manage design collateral, and support product bring-up.
Requirements
- 10+ years of post-education experience in FAB or fabless environments, technology definition and bring-up, device or process architecture, and NPI
- Experience with foundry design kits, SPICE, DR or DRC evaluation, and SPICE-to-silicon assessment
- Experience with advanced-node device physics, backside power, and product design phases
- Experience with product KPIs, DTCO, and parametric, DLY or PLY analysis and gap closure
- Understanding of low-power design techniques
- Understanding of layout effects and their impact on circuit design
Responsibilities
- Review silicon data against SPICE and design goals and compile gap analyses
- Drive foundry process improvements through corrective improvement plans
- Identify device parameter changes for efficient low-voltage operation
- Collaborate with circuit designers on device improvements for performance and energy efficiency
- Manage foundry PDK, design kit, and design-library collateral
- Guide design teams on technology usage for performance, power, area, and cost requirements
- Collaborate on product bring-up and productization
- Analyze and validate production wafer data
- Contribute to binning strategies that maximize parametric yield
Benefits
- Remote work
- Medical insurance
- Flexible time off
- Retirement savings plans
- Modern family planning