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RTL Design Engineer – Interconnect/Uncore

RTL Design Engineer – Interconnect/Uncore

Website SiFive

We bring RISC-V, software, and silicon experts together to innovate with a modern, software-driven approach to semiconductors.

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. For more information, please visit

SiFive is looking for hardware engineers who are passionate about designing industry-leading CPU and interconnect IP to help drive the tidal wave of adoption of RISC-V as the architecture of choice for SoC designs across a broad variety of vertical applications. We build and maintain multiple CPU family lines, TileLink interconnects and other uncore/infrastructure IP, and are seeking motivated individuals to improve/evolve our existing IP, as well as develop new IP. Join us and surf the RISC-V wave with SiFive!



  • Architect, design and implement an enhanced TileLink interconnect, protocol bridges, and other infrastructure/uncore logic as RTL generators, including both open-source and proprietary designs.
  • Improve current designs and work on future designs to provide higher performance, more efficient multi-core and multi-cluster system coherence.
  • Integrate new design content into SiFive’s Chisel/FIRRTL framework and contribute to improvements to that framework to enable automatic configuration/generation of design collateral.
  • Microarchitecture development and specification. Ensure that knowledge is shared via great documentation and participation in a culture of collaborative design.
  • Perform initial sandbox verification, and work with design verification team to create and execute thorough verification test plans.
  • Work with physical implementation team to implement and optimize physical design to meet frequency, area, power goals.


  • 5+ yrs of recent industry experience with coherent fabric, protocols for scalable multi-core and multi-cluster SoC designs.
  • Experience with NoC or other interconnect fabrics.
  • Experience with industry standard bus protocols (e.g. AMBA). Knowledge of TileLink is a plus.
  • Knowledge of cache coherence protocols, architectures and concepts.
  • Ability to architect solutions to connect bus fabrics of disparate protocols.
  • Strong software engineering skills/background, including:
    • object-oriented, aspect-oriented, and particularly functional programming;
    • compiler infrastructures and data modeling for intermediate representations, particularly for domain-specific languages.
  • Proficiency with hardware (RTL) design in Verilog, System Verilog, or VHDL.
  • Experience with Chisel, Bluespec, or other HDL for expressing configurable hardware via software is a plus.
  • Attention to detail and a focus on high-quality design.
  • Ability to work well with others and a belief that engineering is a team sport.
  • BS/MS degree in EE, CE, CS or a related technical discipline, or equivalent experience.

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