Solver Developer - Series B Physics AI startup

Saragossa; San Francisco (CA); Hybrid; USD 180,000 - 240,000; Full time

Job summary

Saragossa is seeking Staff and Senior Staff Solver Developers to design and optimize high-fidelity solvers for CFD and FEM applications. The role emphasizes building solvers from scratch with deep focus on numerics, algorithms, performance, and core software components.

Candidates should have exposure to either CFD/FVM or FEM domains, including unstructured grids, turbulence, and implicit methods. The Bay Area base offers remote work with quarterly office visits; sponsorship is not available and

Qualifications

• Built solvers from scratch with focus on numerics, architecture and performance.
• Experience with CFD/FVM or FEM solvers and unstructured grids.
• Background in structural mechanics or computational electromagnetics is a plus for FEM track.

Skills

Solver development

Numerics

Performance optimization

Core software architecture

CFD

FVM

FEM

Structural mechanics

Computational electromagnetics

Job description

If you’ve spent your career building computational physics solvers, rather than simply using them, this could be worth a conversation and a perfect next step in your career.

We’re partnered with a well funded Series B Physics AI startup building high fidelity simulation technology for complex industrial engineering problems. We’re looking for Staff and Senior Staff Solver Developers across both fluids and non fluids.

You’ll be a perfect fit here if you’ve actually built solvers from scratch and worked on the numerics, architecture, algorithms, performance, and core software behind them.

On the fluids side, you’ll probably be a strong fit if your background is in CFD solver development and you’ve worked deeply with Finite Volume Method (FVM), on complex unstructured grids. Compressible or incompressible flow, turbulence, implicit methods, and strong numerical methods experience are all highly relevant.

On the non fluids side, I’d love to speak with people who’ve built solvers around Finite Element Method (FEM), particularly in structural mechanics or computational electromagnetics. If you’ve owned core numerical work rather than just running commercial tools, that’s the kind of background we’re after.

The company is based in the Bay Area, but remote can work if you’re able to visit the office a few times each quarter.

Important note: Due to the nature of their customer base and projects, candidates must be US citizens or lawful permanent residents. Sponsorship isn’t available for these roles.

If this sounds close to what you’ve been working on, I’d love to chat.