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RTL Design Engineer – Interconnect

RTL Design Engineer – Interconnect
by Daniel Nenni on 07-05-2020 at 11:08 am

Website SiFive SiFive

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!

LOCATION: The person in this role can work out of our offices in the Bay Area, CA or Austin, TX. However, due to the current restrictions surrounding COVID-19, this position is work-from-home until further notice.


Architect, design and implement and enhanced TileLink interconnect, high-level cache controllers, 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.

Knowledge of cache and cache coherency architectures and concepts.

Experience with NoC or other interconnect fabrics.

Experience with industry standard bus protocols (e.g. AMBA). Knowledge of TileLink is a plus.
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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