Multiphysics Modeling Engineer — Equity & Startup Impact

Ultrasonium; Woburn (MA); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

Stock options or equity

Flexible working arrangements

Job summary

Ultrasonium is seeking a highly capable engineer to develop and validate multiphysics models that guide thermal, fluid, and structural decisions. You will own VV/UQ, correlate simulations with experiments, and translate results into engineering decisions with the founding team.

You will collaborate across process, controls, electrical, and mechanical engineering while contributing to IP development. Flexible on-site environment with strong autonomy and growth potential.

Qualifications

• Master's or PhD in Mechanical, Aerospace, Physics, Applied Mathematics, or related field, or Bachelor's with equivalent experience.
• 2+ years of multiphysics simulation experience with COMSOL, ANSYS, OpenFOAM, or equivalent.
• Strong foundation in finite element or finite volume methods.
• Thermal-fluid or structural modeling experience.
• Scripting for simulation and data analysis (Python, MATLAB, or equivalent).
• Experience validating models against experimental data.

Responsibilities

• Develop multiphysics models (thermal, fluid, structural, and coupled) of our process.
• Establish verification, validation, and uncertainty quantification (VVUQ) practice for those models.
• Design simulations to test hypotheses and discriminate between explanations.
• Correlate model predictions against experimental data and drive model improvement.
• Document assumptions, validation status, and confidence for every model used in decisions.
• Collaborate with process, controls, electrical, and mechanical engineering.
• Contribute to IP development with the founding team.

Skills

Multiphysics simulation

Finite element / finite volume methods

Scripting (Python, MATLAB)

Model validation against experimental/

Education

Master's degree in Mechanical, Aerospace, Physics, Applied Mathematics

Bachelor's degree with equivalent experience

Tools

COMSOL

ANSYS

OpenFOAM

Job description

Ultrasonium is seeking a highly capable engineer to develop and validate multiphysics models that guide thermal, fluid, and structural decisions. You will own VV/UQ, correlate simulations with experiments, and translate results into engineering decisions with the founding team.

You will collaborate across process, controls, electrical, and mechanical engineering while contributing to IP development. Flexible on-site environment with strong autonomy and growth potential.