Senior Engineer, CPU Implementation & Flow Automation
SiFiveJob Title
Senior Engineer, CPU Implementation & Flow Automation
Role Summary
Execute and optimize RTL-to-GDS implementation flows for high-performance CPU cores. Own block-level implementation, develop and maintain automation, and apply ML-enhanced methods to meet aggressive power, performance, and area (PPA) targets on advanced process nodes.
Experience Level
Senior — requires 3+ years of hands-on Physical Design/Methodology experience.
Responsibilities
Key responsibilities include:
- Implement, validate, and maintain production RTL-to-GDS recipes using Synopsys Fusion Compiler.
- Own end-to-end implementation of medium-sized CPU sub-blocks from synthesis through final GDS sign-off.
- Drive block-level PPA closure and contribute to hierarchical timing closure (placement, CTS, routing).
- Apply ML tools (e.g., DSO.ai) for design-space exploration and PPA optimization.
- Identify, debug, and resolve flow and tool-related issues; collaborate with methodology and core engineering teams.
- Collaborate with IP teams (SRAM/std cell) to analyze and model PPA impacts.
- Develop and maintain Tcl/Python automation to improve flow efficiency and reproducibility.
Requirements
Must-haves:
- 3+ years of practical experience in Physical Design/Methodology and digital implementation.
- Experience with FinFET nodes (N5/N3); familiarity with N2/GAA is a plus.
- Hands-on knowledge of Synopsys tools: Fusion Compiler, ICC2, PrimeTime, StarRC.
- Strong understanding of floorplanning, pin assignment, and timing budgeting in hierarchical designs.
- Proficiency in Tcl and Python for flow customization, debugging, and data analysis.
- Proven ability to analyze and resolve timing, power, and congestion issues in high-speed, high-density blocks.
- Effective communication skills and ability to collaborate within a structured engineering team.
- Right to work in India and ability to pass background/reference checks; export-control clearance or the ability to obtain necessary approvals may be required.
Education Requirements
Not specified.
About the Company
Company: SiFive
Headquarters: San Mateo, California, United States
SiFive is a pioneering company in the RISC-V ecosystem, focused on transforming the future of computing by delivering high-performance, data-intensive RISC-V solutions. Their compute platforms empower leading technology firms to innovate across various markets, including AI, machine learning, and automotive sectors. SiFive is recognized for its commitment to ongoing innovation and fostering collaboration among talented teams, impacting lives by enabling advanced chip design.
