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Principal Engineer – STA​/Constraints Sign-Off Engineer

Job in West of England, Bristol, Bristol County, BS1, England, UK
Listing for: Aion Silicon Ltd
Full Time position
Listed on 2026-10-21
Job specializations:
  • Engineering
    Electronics Engineer, Hardware Engineer, Test Engineer, Automation & Mechatronics Engineer
Salary/Wage Range or Industry Benchmark: 110000 - 150000 GBP Yearly GBP 110000.00 150000.00 YEAR
Job Description & How to Apply Below

We are seeking a highly motivated Principal STA / Constraints Sign-Off Engineer to lead timing signoff and constraint methodology development for advanced-node SoC and IP designs. The ideal candidate will have deep expertise in STA, timing constraints, signoff closure, and methodology automation, enabling successful tape-outs with best-in-class quality, performance, power, and area (PPA).

This role requires a strong hands-on technical leader who can drive methodology, execution, and signoff while collaborating closely with Architecture, RTL, Verification, DFT and PD team collaboration.

Key Responsibilities
  • Own and drive SoC/IP/blocks timing signoff methodologies across advanced technology nodes.
  • Develop, review, and validate SDC constraints, timing exceptions, and MMMC signoff environments.
  • Lead setup, hold, SI, OCV/AOCV/POCV, and timing closure activities through final signoff.
  • Drive timing correlation across synthesis, implementation, extraction, and signoff flows.
  • Support ECO closure, low-power timing analysis, and cross-functional signoff activities.
  • Develop automation scripts, methodology documentation, training materials, and best practices.
  • Collaborate closely with RTL, Physical Design, DFT, CAD, Verification, and IP teams to achieve timing convergence.
Required /

Preferred Qualifications
  • BS/MS in Electrical Engineering or related field with 12+ years of experience in STA, timing signoff, and ASIC/SoC implementation.
  • Strong hands-on expertise in Prime Time, SDC development, MMMC analysis, timing closure, OCV/AOCV/POCV, crosstalk, and ECO methodologies.
  • Good understanding of ASIC implementation flows, libraries, memories, PDKs, and advanced-node signoff requirements.
  • Strong scripting skills in Tcl, Python, or Perl for flow automation and methodology development.
  • Excellent debugging, analytical, communication, and technical leadership skills.
  • Experience with advanced-node technologies (7nm/5nm/3nm and below).
  • Knowledge of UPF, low-power design, EMIR, and thermal signoff flows.
  • Familiarity with high-speed protocols such as PCIe, DDR, UCIE,ABB, PLLs and all latest IPs.
  • Experience driving methodology improvements and mentoring engineering teams.
Tools

Required:
  • Synopsys:
    Prime Time (PT/PT-SI/PT-PX), ICC2/Fusion Compiler, StarRC, and ICV for STA, signoff, implementation, extraction, and physical verification.
  • Cadence:
    Tempus, Innovus, and Voltus for timing analysis, physical implementation, and power integrity signoff.
  • Scripting:
    Strong proficiency in Tcl, Python, and Perl for automation, methodology development, and reporting.
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