Package & SI/PI - Senior/Staff Packaging Engineer - Electro-Thermal Engineering Bay Area Bay Area Full-time Join the leading chiplet interconnect startup! We are seeking an experienced Senior/Staff Packaging Engineer specializing in electro-thermal simulation to join our advanced packaging team. You will develop comprehensive thermal and electrical simulations for next-generation semiconductor packaging solutions, including 2.5D/3D IC integration, chiplet-based systems, and advanced heterogeneous integration technologies. This role is critical in enabling high-performance computing, AI accelerators, and advanced chiplet architectures. We offer a fun work environment with excellent benefits. ONSITE M-F Join the leading chiplet interconnect startup! We are seeking an experienced Senior/Staff Packaging Engineer specializing in electro-thermal simulation to join our advanced packaging team. You will develop comprehensive thermal and electrical simulations for next-generation semiconductor packaging solutions, including 2.5D/3D IC integration, chiplet-based systems, and advanced heterogeneous integration technologies. This role is critical in enabling high-performance computing, AI accelerators, and advanced chiplet architectures. We offer a fun work environment with excellent benefits. ONSITE M-F Key Responsibilities:

Develop detailed thermal models for 2.5D/3D IC packages, chiplets, and multi-die systems; perform steady-state and transient thermal analysis with hotspot identification

Execute power integrity (PI) and IR drop analysis; optimize power distribution networks (PDN) and power delivery architectures

Conduct electromigration (EM) and reliability analysis for interconnects, bumps, TSVs, and redistribution layers (RDL)

Develop chip-package co-simulation workflows using industry-standard EDA tools (ANSYS RedHawkSC, RHSC-ET, SIwave, Cadence Sigrity/Clarity)

Create hierarchical compact macro models (CMM) and reduced-order thermal models for earlystage design optimization

Automate simulation workflows using Python, TCL, and Shell scripting; build design space exploration tools

Collaborate with silicon design, package design, and manufacturing teams on design-for-reliability (DFR) initiatives

Support customer engagements with technical analysis and present findings to stakeholders

Minimum Qualifications:

Education:

PhD in Electrical/Mechanical Engineering, or related field with focus on thermal management, power delivery, or electronic packaging (Master's with 5+ years experience considered)

Strong academic background in power integrity, signal integrity, and thermal management for advanced packaging

Technical Skills:

Expert proficiency in: ANSYS RedHawk-SC, RHSC Electrothermal, Totem, PathFinder, SIwave, HFSS, Q3D; Cadence Voltus, Sigrity, Clarity; Synopsys RedHawk Fusion, PrimeTime, ICC2

Experience with physical design tools (Cadence Innovus, Synopsys ICC2, Siemens Calibre) and RTLto-GDSII flows

Strong programming/scripting: Python, C/C++, Tcl, Shell (bash); Verilog/VHDL/SystemVerilog for verification

Knowledge of advanced packaging: 2.5D/3D ICs (CoWoS, InFO, EMIB), chiplets, TSVs, interposers, FOWLP, RDL design

Domain Expertise:

Deep understanding of EM/IR analysis, power integrity, thermal physics, and electrothermal cosimulation

Expertise in heat transfer principles (conduction, convection, radiation), thermal material properties, and CTE mismatch

Knowledge of chiplet standards (UCIe and BoW), die-to-die interfaces, and wafer-scale integration

Hands-on experience with semiconductor package thermal/electrical analysis and tape-outs

Ideal Qualifications:

Familiarity with machine learning applications in EDA and design optimization

Experience with HPC, AI/ML accelerator packaging, or co-packaged optics (CPO)

Background in reliability testing (thermal cycling, HTOL, THB) and measurement correlation

What we are looking for:

Strong analytical mindset with expertise across multiple physics domains (thermal, electrical, mechanical)

Excellent communication skills to present complex technical concepts to diverse audiences

Cross-functional collaboration abilities to work with silicon, package, product, and manufacturing teams

Self-motivated professional who thrives in fast-paced environments with minimal supervision

Continuous learner staying current with emerging technologies; innovation-driven with creative problem-solving

Results-oriented engineer delivering high-quality work to enable product milestones on schedule

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