ASIC 物理设计工程师 - 电源
ASIC Physical Design Engineer - Power
### **关于 Positron AI**
Positron AI 正在打造下一代 AI 推理加速器，从零开始设计，专为低延迟、高吞吐量的大语言模型推理而生。为训练时代设计的芯片在推理时会遇到两大瓶颈：内存带宽和芯片间网络。我们设计的架构突破了这两个限制。我们的第一代 Atlas 系统正在 Oracle Cloud Infrastructure 上部署。Asimov 是我们的首款定制 ASIC，将这一架构转化为硅片。在模拟中，Asimov 在功率仅为一半的情况下，每美元和每瓦特的令牌数是领先 GPU 的几倍。在 Titan 系统中，Asimov 被设计用于服务超过 16 万亿参数的模型。2026 年 9 月，我们以 50 亿美元估值筹集了 8.75 亿美元。NEA 领投了此轮融资，Atreides Management、Valor Equity Partners 等其他投资方也参与其中，以将 Asimov 和 Titan 带入市场。我们的团队包括来自 Groq、Lambda、NVIDIA、Meta、F5 等多家行业领袖的工程师。
#### 职位概述
作为高级物理设计工程师 - 电源，你将推动 Positron AI 加速器路线图中关键模块和子系统的电源估算、优化和验证。与高级技术领导合作，你将执行并改进从架构建模到硅片验证的电源方法，帮助我们实现领先的每瓦性能，同时满足严格的电源和热力约束。
#### 主要职责
**电源架构与策略**
- 参与整体芯片电源策略，负责分配模块和子系统的电源方案，涵盖动态电源、漏电、时钟电源、内存电源、互连电源、空闲电源和峰值电源。
**电源建模**
- 在开发生命周期中建立并维护准确的电源模型，从早期架构估算到 RTL 和门级估算。
- 进行基于向量和活动驱动的电源分析，以验证估算结果是否符合实际工作负载行为。
**电源优化**
- 实施并推动电源优化技术，包括时钟门控、操作数隔离、电源门控、电压域和多 Vt 优化。
- 识别并应用内存、流水线、翻转减少和数据移动优化，包括针对 AI 工作负载的特定方法。
- 为 RTL 团队提供可操作的反馈，以在设计周期早期降低电源消耗。
**电源完整性**
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### **About Positron AI**
Positron AI is building next-generation AI inference accelerators designed from the ground up for low-latency, high-throughput large language model inference. Chips built for the training era keep running into two walls at inference time: memory bandwidth and chip-to-chip networking. We designed our architecture to break through both. Our first-generation Atlas systems are deploying in Oracle Cloud Infrastructure. Asimov, our first custom ASIC, takes that architecture to silicon. In simulations, Asimov delivers several times more tokens per dollar and tokens per watt than leading GPUs, at a fraction of the power. Paired in our Titan system, Asimov is built to serve models beyond 16 trillion parameters. In September 2026, we raised $875 million at a $5 billion valuation. NEA led the round, joined by Atreides Management, Valor Equity Partners, and others, to bring Asimov and Titan to market. Our team includes engineers from Groq, Lambda, NVIDIA, Meta, F5, and many other industry leaders.
#### Role Overview
As a Senior Physical Design Engineer - Power, you will drive power estimation, optimization, and verification for key blocks and subsystems across Positron's AI accelerator roadmap. Working alongside senior technical leadership, you will execute and help improve our power methodology from architectural modeling through silicon validation, helping us deliver industry-leading performance-per-watt while meeting aggressive power and thermal constraints.
#### Key Responsibilities
**Power Architecture & Strategy**
- Contribute to the overall chip power strategy, and own power approaches for assigned blocks and subsystems across dynamic power, leakage, clock power, memory power, interconnect power, idle power, and peak power.
**Power Modeling**
- Build and maintain accurate power models across the development lifecycle, from early architectural estimation through RTL and gate-level estimation.
- Perform vector-based and activity-driven power analysis to validate estimates against real workload behavior.
**Power Optimization**
- Implement and drive power optimization techniques including clock gating, operand isolation, power gating, voltage islands, and multi-Vt optimization.
- Identify and apply memory, pipeline, toggle-reduction, and data-movement optimizations, including approaches tailored to AI workloads.
- Give RTL teams actionable feedback to reduce power early in the design cycle.
**Power Integrity**
- Work with the backend team on IR drop, electromigration (EM), power distribution, and power grid analysis.
- Develop and maintain UPF/CPF specifications for assigned domains, including power domains, isolation, retention, power-on sequencing, and reset sequencing.
**Power Verification**
- Run power-aware simulation and UPF verification for your blocks.
- Support reset verification, low-power state validation, wakeup validation, and power sequencing verification.
**Cross-Functional Collaboration**
- Partner with Architecture, RTL, Backend, Firmware, Thermal, Packaging, and System Engineering teams to align power decisions across the chip development flow.
**AI-Enabled Engineering**
- Use AI-driven tools to improve power analysis, regression triage, power anomaly detection, activity clustering, and identification of optimization opportunities.
#### Required Qualifications
- 8+ years of ASIC design or implementation experience, with a significant focus on power.
- Strong hands-on expertise in low-power design techniques.
- Hands-on experience with UPF/CPF power specification and verification flows.
- Strong proficiency with PrimePower and Joules or equivalent power analysis tools.
- Experience working with advanced process nodes.
- A solid grasp of RTL design and its impact on chip power.
- Track record of contributing to power targets on production silicon.
- Strong Tcl and/or Python scripting skills for analysis and automation.
#### Preferred Qualifications
- Experience with AI accelerator architectures.
- Familiarity with LPDDR and HBM memory interfaces.
- Working knowledge of PCIe.
- Experience with dynamic voltage and frequency scaling (DVFS).
- Exposure to thermal modeling.
- Hands-on experience with silicon power validation.
- Experience mentoring junior engineers or leading power efforts for a subsystem.
#### Leveling & Scope
While this role is currently posted at a specific level, we are a growth-oriented organization and are open to hiring at a more senior level for the right candidate. This job description is a focused but generalized overview of the role; specific responsibilities and impact expectations will be tailored to the experience and seniority of the final hire.
#### What Success Looks Like
Within one year, this person will have delivered power estimates for their assigned blocks that reliably predict silicon behavior, driven measurable power reductions through targeted optimizations, delivered clean UPF and power verification for their domains, and contributed meaningfully to a power methodology that scales across future chip generations.
#### Why Join Us?
- Play a key role in power estimation and optimization for a new generation of AI inference accelerators, directly contributing to Positron's performance-per-watt leadership.
- Work at the frontier of silicon and AI, on chips built specifically for the demands of large-scale LLM inference.
- Grow your technical scope alongside an experienced, high-caliber implementation team.
#### Compensation & Benefits
The base salary range for this role is **$200,000 – $300,000**.
These figures represent the base salary range only and do not include other elements of our total compensation package, equity, or comprehensive benefits.
At Positron AI, we value the unique expertise each candidate brings. While the range above reflects our typical expectation for the position, we reserve the flexibility to exceed this range for candidates whose specialized skills, significant experience, or unique qualifications fall outside the standard scope of the role. Final offers are determined based on a variety of factors, including internal equity and individual impact.
#### Benefits & Perks
We want you to do your best work and feel confident that you and your family are taken care of. That means comprehensive coverage, real time to rest, and support for your future.
**Health and wellness**
- Fully company-paid medical, dental, and vision insurance for you and your dependents
- Company-paid life and disability coverage, with voluntary options to add more
- Supplemental hospital, critical illness, and accident coverage available
**Time off and flexibility**
- Unlimited paid time off — we encourage everyone to truly unplug and recharge
- 13 paid company holidays
- Remote-first culture with a company-provided computer and home office setup
**Compensation and future**
- Competitive salary and equity
- 401(k) with company matching, eligible from day one
#### Visa Support
This position is open to candidates currently authorized to work in the U.S. We cannot provide new visa sponsorship for this role but are open to facilitating H-1B visa transfers for eligible candidates.
_Equal Opportunity Employer. If you're excited about the role but don't meet every bullet, we'd still love to hear from you._