Physical Flow Integration Engineer

About SiFive

SiFive is an idea-to-silicon company founded by the inventors of RISC-V to simplify the design and production of custom SoCs.

As the leading commercial provider of RISC-V processor IP, SiFive is on a mission to help engineers design custom chips for domain-specific solutions for many markets, including 5G, edge AI, enterprise networking, storage, and consumer devices.

Industry-leading innovators, including six of the top ten semiconductor companies, are working with SiFive thanks to our proven success, deep expertise, and rich partner ecosystem. With SiFive’s rich IP ecosystem and accessible design platform, every market has access to the development of workload-focused hardware needed to design next-generation products.

As a Physical Flow Integration Engineer, you will be joining a small team to architect, build and maintain physical design flows that work with SiFive’s generated RTL code. You will work closely with logic design, physical design and other teams to bring SiFive’s processor IP to market, as well as developing industry-leading automation to support SoC designs in a variety of vertical markets. This is the perfect opportunity for a tool-focused software engineer looking to expand their horizons and become more directly involved in developing innovative products in silicon.


  • Develop modular, reusable and scalable flows that interface industry standard physical design tools with cutting-edge RTL generation engines.
  • Create, deploy, support, and maintain frameworks for automating generation of CPU core performance data and other collateral.
  • Collaborate with digital design and physical design engineers to validate RTL generator outputs over a wide design space.
  • Establish coding standards and conventions that enable parallel development work across teams under one cohesive framework.


  • 2+ years experience working with physical design flows (Cadence, Synopsys toolsets).
  • BS, MS, or PhD in Computer Engineering, Computer Science, or Electrical Engineering.
  • Interest in building modular, scalable and resilient flows and tools.
  • Experience with scripting languages such as Python, Bash or Ruby.
  • Strong written and spoken communication skills.
  • Experience with developing and releasing development tools.
  • Software and API design skills.

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.