Mainspring Energy
Staff CFD Modeling Engineer
Menlo Park, CA · Staff+
Stay score
odds of building a lasting career here
Sponsors, but it's cap-subject — you still face the weighted lottery (~61% per draw at Level IV). Good if you win; have a cap-exempt backup on your list.
Lottery odds assume a STEM candidate.
Personalize to your clock →H-1B wage level
the lottery is wage-weighted — each level is one more entry
$1,886 more — $161,886 — moves this role to Level III and 3 lottery entries. That figure is inside the range the employer already advertised.
Based on the DOL prevailing wage for this occupation and worksite, a base salary of $161,886 would place this position at wage Level III. That figure is within the posted range, and I'd like to target it. This role classifies under "Electrical Engineers" for prevailing-wage purposes.
DOL prevailing wage, 2026-27 wage year · Electrical Engineers (17-2071) · San Francisco-Oakland-Fremont, CA. Wage level is derived by USCIS from the offered wage, occupation and worksite; the occupation shown is inferred from the job title.
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Sourced from Department of Labor LCA, PERM and prevailing-wage disclosure data. Employer matching is by name, so figures may be split across an employer's legal entities. Absence of a filing means none appears in our copy of the data, not that none exists.
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About the role
- The company began commercial shipments of its Mainspring Linear Generators in 2020 and today has hundreds of megawatts in advanced development and field operations for leading Fortune 500 companies, data centers, and utilities.
- The core values that ground our work, guide our decisions, and connect us together: - Pragmatic Optimism - Excellence without Ego - Proactive Collaboration Job Overview Do you have a favorite upwinding technique for hyperbolic PDEs?
- The ideal candidate can break down complex flow and multidimensional phenomena into fundamental behavior, enabling actionable feedback to improve our product.
Responsibilities
- Manage computational resources on local hardware and on the cloud (AWS / GCP)
- Generate lower order models for use in system-level simulations. Run system-level models to quantify the impact of design choices on generator performance
- Participate in peer review of software written in support of modeling work throughout the team
- Oversee the execution of those plans on the generator with support from the test team
- Run system-level models to quantify the impact of design choices on generator performance
- At the root of our core mission, you will be collaborating across technical domains, frequently integrating with executives and other leaders of software, mechanical design, and product development.
Requirements
- Graduate-level engineering degree (Mechanical, Aerospace, Electrical, Chemical, etc) with 10+ years experience in Computational Fluid Dynamics and its applied mathematical foundations
- 2+ years experience with at least one commercial CFD package (Fluent, Star-CCM, Converge, etc) and one commercial CAD package (Solidworks, Catia, etc)
- Experience generating and validating custom models of varying fidelity (0D through 3D) in at least one programming language, e.g. C/C++, Python, Julia, etc
- Generate test plans to validate observations gleaned from CFD simulations, or to get required boundary conditions needed to appropriately define a model.
- Does your experience not meet all of our posted requirements? Studies have shown that some people are less likely to apply to positions unless they meet every listed requirement. At Mainspring, we are committed to building a diverse, inclusive, flexible, and collaborative environment, so if you want to help us transition the world to clean and affordable electricity, and don't meet all posted requirements for a particular role, we'd still love to hear from you. Mainspring can sometimes be flexible enough to shift responsibilities for the right person, or otherwise identify open or upcoming roles that may better fit your professional background. In more traditional words, Mainspring Energy, Inc is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability. This compensation and benefits information is based on Mainspring Energy's estimate as of the date of publication and may be modified in the future. We generally do not negotiate on salary once we have made an offer. The level of pay within the range will depend on a variety of job-related factors that may include location, relevant prior experience and/or education, or particular skills and expertise. New hires joining the company tend to be paid within the starting base pay range noted above, with opportunities to increase pay over time based on development of additional skills, competencies, and company-specific knowledge.
Compensation
- This compensation and benefits information is based on Mainspring Energy's estimate as of the date of publication and may be modified in the future.
Company info
- As part of this role, you will: - Run commercial CFD software to analyze transient gas flow, chemical kinetics, and heat transfer.
- As part of this role, you will:
This listing is sourced directly from Mainspring Energy's careers page and normalized into a canonical job model.