Computational Nuclear Engineer (Fusion)

Location: Kearny, New Jersey, United States; on-site

Salary: $120,000–$180,000 per year

Company

hirify.global is developing stellarator fusion systems using computer-controlled arrays of planar coils to simplify the design and commercialization of fusion energy.

What you will do

• Develop high-fidelity neutronics and multiphysics simulation workflows for complex 3D stellarator geometries.
• Simulate fusion blanket performance, including tritium breeding ratios, energy deposition, material activation, and radiation shielding.
• Couple neutronics simulations with thermal-hydraulics and structural analysis to refine reactor designs.
• Calculate dose rates and design shielding for personnel and sensitive equipment.
• Prepare technical reports, presentations, and publications based on simulation and optimization results.

Requirements

• PhD in Nuclear Engineering, Computational Physics, Applied Physics, or a related field with 2+ years of experience, or a relevant Master’s degree with 4+ years of experience.
• Strong knowledge of Monte Carlo radiation transport codes such as OpenMC, MCNP, or Serpent.
• Proficiency in Python and C++ for scientific computing.
• Experience with scientific software development practices, including Git, GitHub, and CI.
• Experience with multiphysics coupling frameworks such as MOOSE, Cardinal, or NekRS.
• Ability to work independently, solve complex problems, and collaborate with scientists and engineers.

Nice to have

• Experience with nuclear data processing and libraries such as NJOY.
• Experience with deterministic neutron transport solvers such as Attila or OpenSN.
• Familiarity with HPC environments and MPI/OpenMP parallel programming.
• Experience applying machine learning to nuclear simulation optimization or data handling.
• Understanding of fusion-specific challenges, including first-wall material damage and tritium fuel cycle management.

Culture & Benefits

• Startup environment with independent work and project ownership.
• Collaboration with a diverse team of scientists and engineers.
• Comprehensive medical, dental, and vision benefits.
• Employee equity stock options.
• 20 days of paid time off.