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PD - Principal STA Signoff (Top-Level)

EliyanBay Area1d ago

Join the leading chiplet startup! As an Eliyan Synthesis and STA lead, you will be working at a fast-paced early-stage startup creating technologies that fuel tomorrow’s chiplet based systems with best-in-class power, area, manufacturability, and design flexibility. You will be responsible for putting together synthesis and STA methodologies for best-in-class PHYs and Controllers. You will work with a cross-functional team of experts that operate from first principles, innovate and push the envelope to create high-volume and high-performance manufacturable products. We offer a fun work environment with excellent benefits.

Responsibilities:

Own Subsystem and full-chip STA signoff across all functional and test modes with complete MMMC coverage.

Define and drive a scalable hierarchical constraints & flat Constraint methodology, including:

----Push down constraints, timing budgets, interface constraints (I/O delays), generated clocks, exceptions, case analysis, and mode definitions.

----Merging IP constraints, validated interface assumptions, updated clock/latency intent, propagated exceptions, and closure feedback to top-level signoff.

Lead functional ECO strategy and execution:

----Root-cause critical paths, select optimal fixes on clock ad data, and deliver ECO-ready recommendations to implementation teams.

----Champion high-throughput ECO / PnR iteration methodology to reduce closure cycle time.

Debug and resolve complex timing/constraint issues during implementation.

Partner closely with RTL/design/DFT/physical design teams to align constraints intent, clocking architecture, and closure plan across milestones (place/CTS/route/signoff).

Define MMMC corner strategy by stage (synthesis, PnR, signoff) and ensure consistent signoff criteria and reporting.

Establish and maintain STA signoff collateral: signoff checklist / signoff document per foundry/node, standardized reports, and closure metrics.

Build automation and dashboards for STA productivity: run frameworks, regression, constraints QA, PPA trending, and signoff readiness indicators.

Support low-power timing methodology when applicable (UPF/CPF impacts: level shifters, isolation, retention, power states).

Qualifications (Minimum Required):

8–12 years of hands-on experience in STA and timing closure for complex ASIC/SoC designs (block + top level).

Strong expertise in timing constraints SDC creation, validation, and maintenance across functional + scan/test modes.

Proven track record as a functional ECO expert—able to drive closure with actionable, implementation-friendly ECO guidance.

Strong understanding of deep sub-micron timing effects and signoff considerations: variation/OCV, SI/noise, crosstalk, and margining concepts.

Proficient in Tcl and at least one scripting language for flow automation and reporting.

Ability to work cross-functionally with RTL, DFT, PD/CTS, and signoff teams; strong written and verbal communication.

Preferred (Strong Plus):

Advanced-node experience with TSMC 3nm/2nm (N3/N2) and/or Samsung 3nm/2nm technologies.

Working understanding of library characterization fundamentals and timing model interpretation/debug (timing arcs, constraints arcs, NLDM/CCS concepts, LVF/variation concepts as relevant).

Experience building reusable signoff methodologies across multiple blocks/chips, including constraints QA gates and signoff dashboards.

PD - Principal STA Signoff (Top-Level)

Responsibilities:

Qualifications (Minimum Required):

Preferred (Strong Plus):

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