Celestial AI · 2 days ago
Staff DFT Engineer
Santa Clara, CA
Full-time
Onsite
Lead/Staff
$225K/yr - $245K/yr
8+ years expCelestial AI is a company innovating in the field of data center infrastructure with its next-generation interconnect technology, Photonic Fabric™. They are seeking a Staff DFT Engineer to lead hands-on scan DFT implementation and ensure quality and coverage closure for complex SoC designs.
Semiconductors
Responsibilities
Lead hands-on scan DFT implementation, including:
Scan insertion and stitching
Scan Streaming Network (SSN) implementation
IJTAG (IEEE 1687) insertion and connectivity
Perform scan DFT verification, debug, and DFT DRC closure
Debug and resolve scan-related DRCs, connectivity issues, and control signal problems
Run, analyze, and debug SpyGlass DFT/RTL checks, partnering with design teams to resolve violations
Generate, simulate, and debug ATPG scan patterns
Analyze ATPG results and drive scan coverage improvement and closure
Develop and validate DFT-related timing constraints (scan, shift, capture, and test modes)
Create and maintain TCL scripts for scan insertion, ATPG setup, and coverage analysis
Optimize scan implementations for pattern efficiency and test quality
Support hierarchical scan integration at both block and SoC levels
Collaborate closely with RTL and Physical Design teams to resolve scan-related issues
Support pre-silicon DFT signoff and post-silicon pattern bring-up and debug
Assist with ATE pattern conversion and scan debug activities
Qualification
Required
Bachelor's degree with 8+ years of relevant experience, OR Master's degree with 6+ years of relevant experience
8+ years of hands-on experience in DFT scan implementation
Strong expertise with Siemens Tessent, including: Scan insertion and verification, ATPG pattern generation and coverage analysis, IJTAG (IEEE 1687) and SSN implementation
Strong understanding of: Scan Streaming Network (SSN), IEEE 1149.x, IEEE 1500, and IEEE 1687 standards
Proven ability to resolve scan DFT DRCs and drive coverage closure
Strong TCL scripting skills for automation and flow customization
Experience developing and validating scan and test-mode timing constraints
Full DFT lifecycle experience, from RTL/netlist through silicon debug
Strong debugging, ownership, and problem-solving skills
Excellent verbal and written communication skills
Preferred
Experience with scan compression and advanced scan architectures
Post-silicon experience, including: Pattern bring-up and debug, Silicon characterization and yield learning
Experience mentoring junior engineers or owning DFT scan signoff
Benefits
Health, vision, dental and life insurance
Company
Celestial AI
AI is touching our lives and driving breakthroughs in healthcare, finance, autonomous systems, and countless other domains.
51-200 employees
H1B Sponsorship
Celestial AI has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
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Trends of Total Sponsorships
2025 (15)
2024 (10)
2023 (4)
2022 (7)
2021 (1)
Funding
Current Stage
Growth StageLeadership Team
David Lazovsky
Founder, CEO
Recent News
Venture Capital Access Online
2025-03-13
2025-03-13
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