CPU Design Verification Engineer

SiFive; Hyderabad; On-site; INR 3,000,000 - 6,000,000; Full time

Job summary

SiFive in Hyderabad seeks an experienced verification engineer to own DV strategy for out-of-order CPU cores. You will drive testbench design, coverage, and sign-off for major blocks, mentor junior engineers, and collaborate with micro-architecture, RTL, and post-silicon teams to ensure robust, bug-free cores across OOO subsystems.

You will architect SystemVerilog/UVM environments, develop constrained-random stimulus for deep speculation and memory ordering, and lead DV reviews to shape

Qualifications

• Experience in out-of-order core verification and DV leadership.
• Proficient in SystemVerilog/UVM based testbench design.
• Strong debugging skills for complex DV failures.

Responsibilities

• Own DV strategy, methodology, and execution for major OOO core blocks.
• Architect and implement SystemVerilog/UVM testbenches and reusable environments.
• Define coverage models, sign-off criteria, and drive closure of OOO verification.
• Mentor junior to mid-level DV engineers and lead DV reviews.

Skills

SystemVerilog

UVM

DV leadership

Debug expertise

Memory ordering

Tools

UVM environments

Job description

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. Are you ready? To learn more about SiFive’s phenomenal success and to see why we have won the GSA’s prestigious Most Respected Private Company Award (for the fourth time!), check out our website and Glassdoor pages.

Job Description

As part of complex out‑of‑order (OOO) CPU cores verification, we are looking for the role, where you will own verification strategy, methodology, and execution for major core blocks, drive coverage and sign‑off, and act as a technical leader and mentor within the DV team.

Key Responsibilities Education & Experience

• Own DV for major OOO core subsystems such as:
• Front‑end: fetch, branch prediction, instruction decode.
• Rename / register mapping and dependency tracking.
• Issue queues / schedulers, execution units, bypass networks.
• Reorder buffer (ROB), retirement, exceptions, interrupts, and pipeline flush/replay.
• Load‑store unit (LSU), store buffer, atomics/LR‑SC, fences, speculative loads/stores.
• L1 caches, TLBs, MMU interfaces, and coherence/protocol interfaces.
• Translate ISA + micro‑architecture specifications into detailed verification plans and test strategies.

Testbench & Methodology Leadership

• Architect and implement System Verilog/UVM testbenches for OOO cores and subsystems:
• Reusable UVM environments, agents, monitors, scoreboards, reference models.
• Constrained‑random and targeted stimulus for OOO corner cases (deep speculation, hazard patterns, reorder stress).
• Define and evolve DV methodology for OOO verification: Scenario libraries for speculation, memory ordering, and multi‑core interactions. Reuse patterns across IPs and projects; contribute to common DV infrastructure.

Coverage, Assertions, and Sign‑off

• Define coverage models and sign‑off criteria: Functional, code, assertion, and scenario coverage for OOO execution and memory model compliance.
• Develop and maintain assertion sets (SVA) for key OOO properties, such as:
• No deadlock/livelock in ROB / scheduler / LSQ.
• Correct branch mispredict, exception, and interrupt recovery.
• Correct load‑store ordering, forwarding, and replay behavior.
• Drive coverage closure and sign‑off for owned blocks; review and sign off plans/coverage for peer areas when needed.

Debug & Cross‑Functional Collaboration

• Lead debug of complex failures:
• Subtle OOO bugs (hazards, wrong‑path effects, starvation, corner replay conditions).
• Memory ordering and coherence violations across cores and caches.
• TLB/MMU and privilege/protection corner cases.

Work closely with:

• Micro‑architecture and RTL teams to refine designs for correctness and verifiability.
• Performance/modeling teams to align micro‑arch behavior with models and performance targets.
• Post‑silicon teams to reproduce and root‑cause silicon issues in pre‑silicon DV.

Mentoring & Influence

• Mentor junior and mid‑level DV engineers in: OOO micro‑architecture concepts and debug.
• Testbench design, stimulus generation, coverage, and methodology.
• Provide technical leadership across projects: Lead DV design and reviews, contribute to architecture/micro‑architecture reviews from a verification perspective.
• Champion best practices in DV and help set technical direction for core verification.

Additional Information

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

Championed by leaders who chose to make a real difference, SiFive led the RISC‑V revolution—creating a tremendous wave with the strength to remove economic hurdles and create opportunities for all. Now that we’ve made history, you have the opportunity to write the future. If you love to be challenged, you can join the best of the best and get rewarded for doing something that truly matters.