Physical Design Engineer/ Signoff Engineer - CA/ TX - (JK)

Central Business Solutions, Inc; San Diego (TX); On-site; USD 110,000 - 140,000; Full time

Job summary

Central Business Solutions, Inc is seeking Static Timing Analysis engineers to own timing constraints and drive timing closure across multi-mode multi-corner designs in a fast-paced SoC environment.

You will collaborate with Synthesis, P&R, CTS, DFT and IR/EM teams to deliver silicon-ready timing signoff while applying advanced node knowledge and automation to optimize flows.

Qualifications

• Strong fundamentals in setup/hold and derating concepts.
• Hands-on PrimeTime / PrimeTime SI for block/full-chip timing signoff.
• Proficiency in SDC constraint development and validation (clocks, I/O timing, CDC).
• Experience with MMMC (multi-mode multi-corner) analysis and closure.
• Knowledge of OCV / AOCV / POCV variation-aware timing methodologies.
• Familiarity with crosstalk and signal-integrity analysis and noise closure.
• Understanding of parasitic extraction and RC corner concepts (SPEF, StarRC/Quantus QRC).
• Solid understanding of the physical design flow and its timing interaction.
• Exposure to advanced nodes (16nm/7nm/5nm/3nm FinFET).
• Mandatory TCL scripting; Python or Perl for flow automation.
• Strong debugging and clear cross-functional communication skills.

Responsibilities

• Develop, review, and maintain timing constraints (SDC) including clocks, generated clocks, I/O delays, and CDCs.
• Perform block-level and full-chip timing signoff using PrimeTime / PrimeTime SI (and Cadence Tempus).
• Close setup/hold and other timing violations; implement timing ECOs with P&R teams.
• Run SI analyses for crosstalk delay and noise; correlate with extraction data.
• Set up RC parasitics extractions and validate extraction-signoff correlation.
• Apply MMMC and variation-aware timing methodologies across designs.
• Create timing abstracts/ETM/ILM models and budgets for hierarchical designs.
• Support low-power timing with UPF-based multi-voltage domains and level shifters.
• Automate timing flows with TCL/Python/Perl; improve turnaround and reporting.
• Collaborate with Synthesis, P&R, CTS, DFT, and IR/EM teams; document methodologies.

Skills

Static timing

Timing signoff

MMM C analysis

TCL scripting

Debugging

Cross-functional teamwork

Education

B.E./B.Tech. in Electronics & Communication/EE/VLSI

Tools

Synopsys PrimeTime

PrimeTime SI

Cadence Tempus

SPEF/RC extraction tools

Job description

About the Role

We are hiring Static Timing Analysis engineers to strengthen the timing signoff team supporting a leading SoC manufacturer on advanced-node designs. In this role you will own timing constraints, drive block- and full-chip timing closure across all modes and corners, and collaborate closely with the physical design, synthesis, and DFT teams to deliver clean, silicon-ready timing signoff.

The ideal candidate has strong fundamentals in static timing analysis, hands-on experience with industry signoff tools, and a proven track record of closing timing on complex, high-frequency designs at advanced FinFET technology nodes.

Key Responsibilities

• Timing constraints (SDC): Develop, review, validate, and maintain timing constraints — clock definitions, generated clocks, I/O delays, false paths, multicycle paths, and clock-domain-crossing (CDC) exceptions — and ensure constraint consistency and quality.
• Timing signoff: Perform block-level and full-chip static timing analysis and signoff using Synopsys PrimeTime / PrimeTime SI (and/or Cadence Tempus) across a full multi-mode multi-corner (MMMC) setup.
• Timing closure: Analyze and close setup, hold, recovery/removal, and transition/capacitance violations; generate and implement timing ECOs and coordinate fixes with the place-and-route team.
• Signal integrity: Run crosstalk delay and noise (SI) analysis, identify and resolve SI-induced violations, and correlate with extraction and physical data.
• Parasitic correlation: Set up and validate RC parasitic extraction and SPEF (StarRC / Quantus QRC), manage RC corners, and ensure extraction-vs-signoff correlation.
• Variation-aware analysis: Apply OCV / AOCV / POCV (SOCV) derating methodologies and drive accurate margin-aware signoff.
• Hierarchical timing: Build and validate timing abstracts / interface models (ETM / ILM), perform interface timing budgeting, and support top-level integration for hierarchical designs.
• Low-power timing: Handle UPF-based multi-voltage / multi-power-domain designs, including level shifters, isolation cells, and power-aware timing checks.
• Flow & automation: Automate and enhance timing analysis and ECO flows using TCL / Python / Perl; improve turnaround time and reporting.
• Collaboration & signoff quality: Work with synthesis, P&R, CTS, DFT, and IR/EM teams; document methodology, present timing reviews, and provide silicon-ready signoff sign-off criteria and reports.

Required Skills & Experience (Must-Have)

• Strong fundamentals in static timing analysis — setup/hold, recovery/removal, timing arcs, slack, path groups, clock latency, uncertainty, and derating concepts.
• Hands-on experience with Synopsys PrimeTime / PrimeTime SI for block and/or full-chip timing signoff.
• Proficiency in SDC constraint development, debug, and validation (clocks, I/O timing, exceptions, CDC).
• Experience with MMMC (multi-mode multi-corner) analysis and closure.
• Understanding of OCV / AOCV / POCV variation-aware timing methodologies.
• Working knowledge of crosstalk / signal-integrity analysis and noise closure.
• Familiarity with parasitic extraction and SPEF (StarRC / Quantus QRC) and RC corner concepts.
• Solid understanding of the physical design flow — synthesis, place-and-route, and clock tree synthesis — and its interaction with timing.
• Exposure to advanced technology nodes (16nm / 7nm / 5nm / 3nm FinFET).
• Strong scripting skills in TCL (mandatory); Python or Perl for flow automation.
• Good debugging skills, clear communication, and the ability to work in a cross-functional, delivery-driven team.

Good-to-Have Skills

• Experience with Cadence Tempus / Quantus signoff tools.
• Low-power design exposure — UPF, power domains, level shifters, and isolation cells.
• Hierarchical timing signoff, timing budgeting, and ETM / ILM model generation and validation.
• IR-drop / electromigration awareness and exposure to Ansys RedHawk / Cadence Voltus (rail-aware timing).
• DFT timing knowledge — scan, ATPG, and test-mode (shift/capture) timing closure.
• Formal SDC / constraint verification tools and glitch / dynamic-power awareness.
• Experience across multiple full tapeouts from RTL-to-GDSII signoff perspective.

Experience Levels

• Candidates across the 3–8 year band are welcome. Depth of ownership and independence are expected to scale with experience:
• Experience Typical Scope & Expectations
• 3 – 5 years Block-level SDC development and timing closure; setup/hold and SI debug.
• Timing ECO generation and support under guidance; extraction and MMMC runs.
• Contributes to flow scripts and signoff reports.
• 5 – 8 years Independent ownership of full-chip / hierarchical timing signoff and closure.
• Interface timing budgeting, ETM/ILM modeling, and methodology/flow definition.
• Drives complex ECO closure, reviews constraints, and mentors junior engineers.

Educational Qualification

• B.E. / B.Tech. / M.E. / M.Tech. in Electronics & Communication, Electrical & Electronics, VLSI Design, Microelectronics, or a related discipline.