CPU Architecture

SiFive is the leading provider of market-ready processor core IP, development tools and silicon solutions based on the free and open RISC-V instruction set architecture. Led by a team of seasoned silicon executives and the RISC-V inventors, SiFive helps SoC designers reduce time-to-market and realize cost savings with customized, open-architecture processor cores, and democratizes access to optimized silicon by enabling system designers in all market verticals to build customized RISC-V based semiconductors.
At SiFive, you’ll be part of a fun, engaging team and be afforded the opportunity to grow within the company. You will bring fruition the new RISC-V architecture and enable its rapid adoption by implementing new tools, breakthrough design methods and services. We need people who are trail-blazers, aren’t afraid to take a chance, and don’t always “go with the flow”.


  • Configuration/Customize of RISC-V CPU according to different application requirement
  • Optimize the micro architecture of current RISC-V CPU core
  • Optimize or re-design the memory sub-system for CPU core
  • Define the micro architecture spec and C model for hardware engine of co-processor to RISC-V
  • Direction RTL coding of CPU building block and extension instruction hardware
  • Co-work with compiler team/partner to support extension feature of CPU


  • BS degree or equivalent practical experience. MS in EE or CS is preferred.
  • 8+years’ experience in CPU core development with RISC ISA
  • Knowledge of compiler principle and open source compiler
  • Strong experience of verification of CPU core according to ISA
  • Experience of DSP instruction and pipe-line design
  • Experience of cache implementation for instruction and data
  • Experience of CPU related verification methodology
  • Good people and communication skills in Mandarin and English

Big Plus:

  • Experience of chisel usage of RISC-V
  • Experience of IoT ASIC/SoC architecture design.
  • Experience of AI related hardware accelerator engineer, especially for CNN, DNN and SIMD/SIMT
SiFive is proud to be an equal employment opportunity workplace. We offer a competitive compensation package that includes flexible paid time off, health, vision and dental benefits, 401(k) plan, employee stock option program, and much more. If you yearn to be challenged and wish to work in an environment where the boundaries of your creativity and skills will be tested, then SiFive is place for you. Collaborate | Innovate | Empower