Senior Layout Engineer; Memory​/Mixed-Signal SoC

Senior Layout Engineer (Memory / Mixed-Signal SoC)

Pay: $ - $ per year

Numem is a California- and Arizona-based company that transforms next-generation memory technologies to power AI applications at the edge and data center. Our solutions deliver ultra-low latency, low power, and optimized density to meet the performance demands of modern AI workloads. We specialize in advancing founder-based MRAM technologies, enhanced through state-of-the‑art innovations in design, sense, power efficiency, and performance optimization, enabling a broad range of applications across edge and data‑center environments.

We are seeking a Senior Layout Engineer to lead physical implementation of a complex memory‑centric mixed‑signal chip through multiple tapeout milestones. The role includes hands‑on full‑custom layout, block integration, and top‑level assembly spanning memory arrays, analog/mixed‑signal blocks, digital logic, place‑and‑route, and IO/ESD structures. You will partner with Memory, Analog, and Digital Design teams to ensure layout quality, reliability, performance, and manufacturability across foundry signoff requirements.

• Lead full‑custom layout for memory, analog/mixed‑signal, and mixed‑voltage interface circuitry.
• Integrate and assemble top‑level chip/block hierarchies including memory macros, analog slices, digital logic, and IO/ESD.
• Drive floor planning, power‑grid planning, shielding, and critical routing strategies for performance and noise robustness.
• Coordinate with digital P&R teams and ensure clean handoff between custom and P&R regions (boundaries, pins, blockages).
• Own layout signoff readiness: DRC/LVS, density/fill, antenna, EM/IR, ESD, and reliability checks.
• Work closely with design engineers to interpret constraints (matching, symmetry, device orientation, guard ringing).
• Manage iterative ECOs and integration changes while maintaining schedule and quality targets.
• Develop scripts/automation (TCL/Python/Shell) to improve productivity for repetitive layout and QA flows.

• 10+ years of hands‑on IC layout experience with multiple successful tapeouts (memory or mixed‑signal preferred).
• Demonstrated experience leading block‑level and top‑level integration including custom + P&R + IO/ESD domains.
• Must be knowledgeable of basic layout and design tools.
• Strong understanding of layout‑dependent effects and analog layout fundamentals (matching, parasitics, shielding, guard rings).
• Experience with multi‑voltage domains, isolation techniques, and reliable power routing methodologies.
• Expertise running and debugging signoff flows: DRC/LVS, parasitic extraction, EM/IR, antenna, and reliability checks.
• Ability to communicate effectively with Memory, Analog, and Digital design teams and drive closure on layout issues.
• Cadence:
  Virtuoso Layout Suite / Custom Compiler equivalents; familiarity with OA libraries and hierarchical flows.
• Synopsys:
  Custom Compiler / ICC2 or equivalent digital implementation tools; ability to collaborate with P&R teams.
• Verification/Signoff:
  Calibre or equivalent DRC/LVS/PERC; extraction and post‑layout simulation workflows.
• Automation: TCL/Python/Shell scripting to automate layout tasks, checks, pinlist generation, and QA.

• Experience integrating memory arrays/macros with shared analog and IO infrastructure.
• Familiarity with ESD methodology and IO ring integration constraints.
• Experience with high‑density routing, noise isolation, and substrate coupling mitigation.
• Comfortable mentoring junior layout engineers and driving quality checklists.