Staff Engineer - CPU DV

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 are continuing to enable 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, data center, mobile, and consumer. With SiFive, the future of RISC-V has no limits.

At SiFive, we are always excited to connect with talented individuals, who are just as passionate about driving innovation and changing the world as we are.

Our constant innovation and ongoing success is down to our amazing teams of incredibly talented people, who collaborate and support each other to come up with truly groundbreaking ideas and solutions. Solutions that will have a huge impact on people's lives; making the world a better place, one processor at a time.

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Job Description:

Role Overview

We are seeking a highly skilled Staff Design Verification Engineer with 6+ years of experience to lead verification of complex CPU core microarchitecture. The candidate will drive DV strategy, architecture validation, and closure for high-performance processors, ensuring functional correctness, performance, and quality at silicon level.

Key Responsibilities

• CPU Core Verification

• Own end-to-end verification of CPU core components (Fetch, Decode, Execute, Memory, Pipeline, Cache, MMU)

• Validate microarchitectural features such as:

• Out-of-order execution

• Branch prediction

• Cache coherency

• Virtual memory & paging

• Develop test plans from architecture specifications and ensure full coverage closure

Verification Methodology & Execution

• Lead verification using System Verilog / UVM

Develop:

• Testbenches

• Constrained-random tests

• Scoreboards and checkers

• Coverage models (functional + code)

• Drive regressions and debug complex failures across simulation/emulation platforms

Architecture & Feature Validation

• Work closely with Architecture & Design teams to:

• Understand ISA behavior (e.g., ARM ISA, RISC-V, or x86)

• Validate corner cases, exceptions, interrupts

• Perform ISA-level validation and compliance testing

Additional Information:

This position requires a successful background and reference checks and satisfactory proof of your right to work in:

Any offer of employment for this position is also contingent on the Company verifying that you are a authorized for access to export-controlled technology under applicable export control laws or, if you are not already authorized, our ability to successfully obtain any necessary export license(s) or other approvals.

SiFive is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.