Mid-End ASIC Engineer, Senior

Positron AI specializes in developing custom hardware systems to accelerate AI inference. These inference systems offer significant performance and efficiency gains over traditional GPU-based systems, delivering advantages in both performance per dollar and performance per watt. Positron exists to create the world's best AI inference systems.

We're looking for an exceptional Senior Mid-End ASIC Engineer to own synthesis, timing convergence, implementation readiness, and logical design quality across our AI accelerator roadmap. This is a deeply technical, hands‑on engineering role responsible for transforming high-quality RTL into implementation-ready netlists while driving timing closure strategy, constraint development, physical‑aware optimization, and close collaboration between RTL designers and backend implementation partners. You will serve as the technical bridge between architecture, RTL, verification, and physical implementation.

• Define and own synthesis methodology across current and future ASIC generations, including scalable flows for RTL synthesis, constraint development, timing budgeting, QoR optimization, incremental synthesis, and hierarchical implementation.
• Establish signoff criteria and methodology for synthesis deliverables.

• Own hands‑on synthesis using industry‑leading EDA tools, including Cadence Genus and Synopsys Design Compiler (or equivalent).
• Develop and maintain SDC constraints, clock definitions, false paths, multicycle paths, generated clocks, and MMMC environments.
• Drive continuous improvement of synthesis QoR.
• Own logical timing closure and drive optimization across frequency, area, power, congestion, and wireability.
• Perform root‑cause analysis of timing bottlenecks and develop timing budgets across all chip partitions.
• Collaborate closely with architecture and RTL teams to eliminate timing risks before physical implementation.

• Partner closely with backend implementation engineers to drive physical‑aware synthesis, retiming, register balancing, pipeline optimization, logic restructuring, and hierarchical timing budgeting.
• Ensure RTL is implementation‑friendly from the outset.

• Partner closely with architecture, RTL, verification, physical design, DFT, IP providers, and backend design services to drive rapid issue resolution.
• Serve as Positron's synthesis technical lead with external implementation partners, reviewing QoR, timing, area reports, and constraint methodology, and defining acceptance criteria.

• Apply AI to improve timing analysis, QoR regression, constraint generation, timing debug, report analysis, documentation, and engineering automation.

• 12+ years of ASIC implementation experience, including multiple successful tapeouts.
• Expert‑level proficiency in synthesis methodology and flow development.
• Expert‑level command of Cadence Genus and/or Synopsys Design Compiler.
• Strong SDC expertise, including constraint development and MMMC environments.
• A solid grasp of RTL design principles and implementation‑friendly coding practices.
• Hands‑on experience with advanced process nodes at 5nm and below.
• Strong Tcl and Python scripting ability for automation and flow development.
• Excellent debugging and root‑cause analysis skills.

• Experience with AI accelerators, CPUs, or GPUs.
• Familiarity with LPDDR, PCIe, or Ser Des interfaces.
• Exposure to chiplet‑based architectures and multi‑clock SoC designs.

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. Please note that this job description serves as 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.

Within one year, this person will have established a production‑grade synthesis methodology, delivered predictable timing closure, reduced implementation…