Principal Simulation Engineer (C++/CUDA)

Location: Los Angeles, CA; based in Hawthorne with full-time onsite presence five days a week

Salary: $225,000–$300,000 annually, plus stock options; compensation outside this range may be considered case by case.

Company

hirify.global develops AI-native manufacturing systems that integrate software, hardware, and physics to produce industrial-scale parts through automated metal 3D printing.

What you will do

• Develop high-performance numerical solvers and physics-based models for advanced metal 3D printing systems.
• Implement real-time or near-real-time simulations for HPC, GPU, and specialized hardware platforms.
• Collaborate with software engineers to deploy laser powder bed fusion models, integrate low-level solvers into simulation pipelines, and interface with hardware systems.
• Guide computational geometry and meshing approaches for large-scale physics-driven simulations.
• Architect simulation modules for FPGAs and GPUs.
• Contribute to model-predictive control strategies and maintain documentation for algorithms, solvers, and integrated systems.

Requirements

• Bachelor’s degree in applied mathematics, physics, computer science, mechanical engineering, or a related technical field.
• 10+ years of professional experience developing custom simulation solvers, with a PhD in a relevant field.
• Demonstrated experience writing low-level numerical solvers for physical simulations.
• Strong programming skills in C, C++, or CUDA.
• Experience developing simulations in high-performance computing environments, including GPUs.
• Academic or professional familiarity with solid mechanics, continuum mechanics, or related physical modeling domains.

Nice to have

• Experience with real-time or near-real-time GPU and parallel computing simulations.
• Experience with direct numerical simulation, thermo-elastic or thermo-elastoplastic modeling, and hybrid physics/data-driven methods.
• Familiarity with computational geometry, optimization, control theory, and 2D/3D meshing libraries.
• Strong foundations in numerical analysis, first-principles problem solving, and technical communication.

Culture & Benefits

• Inclusive, diverse, collaborative, and learning-oriented environment with data-driven decision-making.
• Significant stock option package and employer-paid medical, dental, and vision insurance.
• Life insurance, traditional and Roth 401(k), paid vacation, sick leave, company holidays, and generous paid parental leave.
• Relocation assistance, free catered meals, flexible work hours, casual dress, and regular team-building events.