Silicon Product and Test Engineer
Block, Inc. is a technology company building tools for economic empowerment, operating a portfolio of financial brands including Square, Cash App, Afterpay, TIDAL, Bitkey, and Proto. It serves sellers, consumers, artists, and bitcoin users through payments, banking, buy-now-pay-later, music streaming, and bitcoin self-custody and mining products.
Maintainer signals as of 8/11/2026
About Block, Inc.
Block, Inc. builds technology aimed at increasing access to the global economy. Its brands each unlock different aspects of the economy: Square makes commerce and financial services accessible to sellers; Cash App is an easy way to spend, send, and store money; Afterpay (Clearpay in the UK) helps customers manage spending over time; TIDAL is a music platform empowering artists as entrepreneurs; Bitkey is a self-custody bitcoin wallet; and Proto builds open, accessible bitcoin mining hardware and services. Block has been a long-time advocate for bitcoin, integrating bitcoin buying/selling and Lightning Network payments into Cash App and Square, funding open-source bitcoin infrastructure through Spiral (including the Lightning Development Kit), and engaging in bitcoin policy advocacy through groups like COPA, the Digital Energy Council, the Crypto Council for Innovation, and the Texas Blockchain Council. The company also runs a significant open source program (contributing to projects like Goose, an on-machine AI developer agent, OkHttp, Retrofit, gRPC, Envoy, and MySQL) and an AI research effort, including co-founding the Agentic AI Foundation with Anthropic and OpenAI. Block serves individual consumers, small and medium-sized businesses/merchants, artists, and developers.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You will drive post silicon bring up and productization from first silicon through mass production You will develop and execute characterization plans across process voltage and temperature You will analyze silicon data across CP FT Bench and System platforms to improve correlation and optimize system level performance You will collaborate with foundry OSAT and external vendors to support bring up qualification yield improvement and manufacturing execution You will develop KPIs and dashboards to track power performance process variation yield and product quality metrics
Requirements
- Bachelor's or Master's degree in Electrical Engineering, Computer Engineering, or a related field.
- 5–10 years of experience in Product Engineering, Test Engineering, Silicon Validation, or Post-Silicon Engineering in fabless or semiconductor environments.
- Strong understanding of semiconductor manufacturing flows including wafer sort (CP), final test (FT), qualification, and high-volume manufacturing.
- Experience with silicon bring-up, characterization, yield analysis, and product qualification for advanced-node ASICs or SoCs.
- Experience with ATE platforms such as Advantest 93K or Chroma.
- Experience developing or debugging ATE test programs and production screening methodologies.
- Strong statistical data analysis and debugging skills using tools such as JMP, Python, or similar analysis frameworks.
- Experience with DOE planning, silicon correlation, and yield optimization methodologies.
- Experience collaborating cross-functionally across Design, Systems, Firmware, Reliability, Manufacturing, Foundry, and OSAT teams.
- Strong problem-solving skills with the ability to independently drive technical issues to closure.
- Comfortable operating in ambiguous, fast-moving environments with a high degree of ownership.
Responsibilities
- Drive post-silicon bring-up, characterization, qualification, and productization activities from first silicon through mass production.
- Develop and optimize wafer sort (CP) and final test (FT) screening strategies to improve power, performance, yield, quality, and DPPM.
- Develop, debug, and maintain ATE test programs and screening methodologies for advanced-node ASICs.
- Define and execute characterization plans across process, voltage, and temperature (PVT) conditions.
- Perform silicon data analysis across CP, FT, Bench, and System platforms to improve correlation and optimize system-level performance.
- Drive DOE planning, execution, and analysis for silicon characterization, yield optimization, and process tuning.
- Collaborate with system and hardware engineers to develop effective ASIC binning methodologies and system optimization strategies.
- Define and support ATE hardware requirements including probe cards, sockets, and load boards.
- Analyze wafer-level and package-level parametric and functional data to identify trends, root-cause failures, and drive corrective actions.
- Engage with foundry, OSAT, and external vendors to support bring-up, qualification, yield improvement, and manufacturing execution.
- Develop KPIs and dashboards to track power, performance, process variation, yield, and product quality metrics.
Benefits
- Remote work
- Medical insurance
- Flexible time off
- Retirement savings plans
- Modern family planning