EM Solver Architect for High-Speed Electronics

CDFAM - Computational Design Symposium; Palo Alto, Northern (CA, KY); Hybrid; USD 120,000 - 180,000; Full time

Benefits offered by this job

Equity

Flexible work

Job summary

Vinci4D is seeking a computational electromagnetics engineer to design and implement full-wave EM solvers for GHz- range SI/CEM applications within a multi-physics platform. You will derive discretisations, implement solvers, validate against references, and integrate results into SI workflows for PCB packaging and interconnects.

You will contribute to time-domain and frequency-domain solvers (FDTD, FDFD, quasi-static), develop S-parameter extraction, and support EM-thermal coupling.

Qualifications

• Deep working knowledge of computational electromagnetics: FDTD, FDFD, and quasi-static methods
• Hands-on experience with signal integrity simulation for the semiconductor industry
• Solid understanding of the full SI simulation workflow: from 3D EM field solutions through S-parameter extraction to eye diagram
• Experience implementing FDTD solvers including Yee cell, CFL stability, PML, and port-based S-parameter extraction
• Experience with frequency-domain EM (FDFD or equivalent) including complex material properties and sparse linear systems
• Experience with quasi-static field solvers for resistive, capacitive, and inductive parasitic extraction
• Proficiency in C++ and/or Python in a performance-critical scientific computing context
• Strong software engineering practices: Git, code review, automated testing, CI/CD pipelines, regression testing against reference solutions

Responsibilities

• Design and implement frequency-domain and time-domain full-wave EM solvers targeting IC package, via, connector, and PCB interconnect structures at GHz frequencies
• Develop S-parameter port extraction workflows - implementing waveport and lumped port excitations, Fourier-transforming time-domain responses, and producing touchstone-format output compatible with industry channel simulators
• Build signal integrity analysis capabilities: transmission line characterisation, via resonance prediction, crosstalk analysis, and eye diagram generation from simulated channel responses
• Implement time-domain methods (FDTD) with PML absorbing boundary conditions for broadband signal integrity and EMI analysis, including Gaussian pulse excitation and wideband S-parameter extraction in a single simulation run
• Develop quasi-static field solvers for parasitic extraction - resistive, capacitive, and inductive - with frequency-dependent skin-effect corrections, producing RLGC outputs for SPICE and channel simulation workflows
• Build the EM-to-thermal coupling layer: computing volumetric Ohmic dissipation from EM field solutions and passing it as a source term to Vinci4D’s thermal solver, with support for iterative coupling under temperature-dependent material properties
• Develop and maintain validation infrastructure: convergence tests, golden-output comparisons against commercial reference tools (HFSS, CST, SIwave), and SI-specific benchmarks covering via S-parameters, transmission line impedance, and crosstalk
• Collaborate with the team to integrate EM capabilities into the Vinci app, delivering outputs in formats familiar to SI engineers: S-parameters, eye diagrams, impedance profiles, and RLGC matrices

Skills

FDTD

FDFD

Signal integrity

C++

Python

SI workflow

CI/CD

GPU computing

Education

Graduate degree in electrical engineering / applied mathematics / computational physics

Tools

HFSS

CST

SIwave

CUDA

Job description

Vinci4D is seeking a computational electromagnetics engineer to design and implement full-wave EM solvers for GHz- range SI/CEM applications within a multi-physics platform. You will derive discretisations, implement solvers, validate against references, and integrate results into SI workflows for PCB packaging and interconnects.

You will contribute to time-domain and frequency-domain solvers (FDTD, FDFD, quasi-static), develop S-parameter extraction, and support EM-thermal coupling.