Interconnect Design Engineer in Cambridge

SiFive is looking for a staff level hardware engineer who is 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. We’re creating massively customizable IP and improving time‑to‑market by designing hardware as highly‑configurable generators. We leverage technology and ideas from the software industry to execute hardware design with the agility of software development.

Responsibilities

• Architect, design and implement an enhanced TileLink interconnect, cache controllers, protocol bridges, and other infrastructure/uncore logic as RTL generators in Chisel.
• Implement RTL generators such that elements self‑configure to optimally connect to each other.
• Enhance future designs to provide higher performance, more efficient multi‑core and multi‑system coherence.
• Design extensive configurability as a first‑class consideration.
• Integrate new design content into SiFive’s Chisel/FIRRTL framework and contribute to improvements that enable automatic configuration/generation of documentation, verification testbenches, and tests.
• Perform initial sandbox verification and work with the design verification team to create and execute thorough verification test plans.
• Ensure that knowledge is shared via creation and maintenance of great documentation and participation in a culture of collaborative design.

Qualifications

• Knowledge of cache and cache coherency architectures and concepts.
• Experience with NoC or other interconnect fabrics.
• Familiarity with industry‑standard bus protocols (AXI, AHB, APB, CHI).
• Ability to architect solutions to connect bus fabrics of disparate protocols.
• Strong software engineering skills/background, including:

• Object‑oriented, aspect‑oriented, and functional programming.
• Templated metaprogramming in any language.
• Compiler infrastructures, particularly for domain‑specific languages.
• Data modeling for intermediate representations that optimize or transform compiler passes.
• Test‑driven development and adaptive unit testing.

Nice to Have

• Experience with Scala/Chisel, Bluespec, or another DSL for expressing configurable hardware via software.
• Knowledge of RISC‑V architecture.
• Experience with Git, GitHub, Jira, Confluence.

Pay & Benefits

Base Pay Range: $158,760.00 – $194,040.00. In addition to base pay, this role may be eligible for variable or incentive compensation and/or equity. The role also includes a comprehensive benefits package, which may include healthcare, retirement plans, paid time off, and more.

Additional Information

This position requires a successful background and reference checks and satisfactory proof of your right to work in the United States of America. Any offer is contingent on the Company verifying that you are authorized for access to export‑controlled technology under applicable export control laws or that we can obtain the required export licenses.

Equal Opportunity Employer SiFive is an equal‑opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. As an E‑Verify employer, we use this system to confirm the employment eligibility of all new hires in accordance with federal law. All applicants will be required to complete a Form I‑9, Employment Eligibility Verification, upon hire. We do not use E‑Verify to pre‑screen job candidates and will comply with all E‑Verify regulations.

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