About SiFive

As the pioneers who introduced RISC-V to the world, SiFive is transforming the future of compute by bringing the limitless potential of RISC-V to the highest performance and most data-intensive applications in the world. SiFive’s unrivaled compute platforms have enabled leading technology companies around the world to innovate, optimize, and deliver the most advanced solutions of tomorrow across every market segment of chip design, including artificial intelligence, machine learning, automotive, datacenter, mobile, and consumer. With SiFive, the future of RISC-V has no limits.

In this position, you will drive the redesign of the software in our FPGA-accelerated simulation infrastructure which employs cloud-hosted PCIE-attached FPGAs to rapidly evaluate new RISC-V core designs. We’re looking for a self-directed engineer who can use their experience writing performant code for PCI-E-based FPGAs and building scalable applications in C++ to take our infrastructure, based on FireSim (https://fires.im), to the next level. With your help, we aim to build the next generation of hardware emulation capacity for our RISC-V core IP: fast to support RISC-V software development, productive to debug, and cost-effective, so that it can be deployed to every engineer in the company.


  • Redesign the software-component of Firesim infrastructure.
  • Optimize PCI-E performance to improve throughput.
  • Co-design FPGA RTL and simulator compiler subsystems.
  • Work with SiFive engineers to build out new emulator features.


  • Strong experience writing C++ (> 8 years as a primary language).
  • Experience with designing standalone applications / libraries.
  • Experience with developing PCI-E applications (Ideally, for FPGAs over PCI-E).
  • Self-directed. Strong oral and written communication skills.
  • BS in Computer Engineering, Computer Science, or Electrical Engineering.
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.
We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.
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 the place for you!
Notice to Staffing Agencies / External Recruiters:
Thank you for your interest in SiFive Inc. Please note that SiFive does not accept unsolicited resumes from external agencies unless contracted to fill a specific position. Agencies are hereby specifically directed NOT to contact SiFive employees directly in an attempt to present candidates – all applications must go through SiFive's internal recruiting team. Any third-party resume forwarded by agencies/external recruiters to a SiFive mailing address, fax machine or email address, directly to SiFive employees, or to SiFive's resume database will be considered property of SiFive Inc and treated as a direct application. This exchange does not constitute an agreement between SiFive and the agency/external recruiter. SiFive reserves the right to contact the candidate directly. Employment agencies/external recruiters will receive no compensation from SiFive or its companies.

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