Senior Software Engineer, Multiphysics Simulation

Antares; Los Angeles (CA); On-site; USD 140,000 - 190,000; Full time

Job summary

Antares in Los Angeles is seeking a Senior Software Engineer to develop in-house multiphysics simulations for nuclear reactor predictions. You will lead technical work with scientists, engineers, and designers to deliver end-to-end simulation features.

You will design data-intensive Python tools, write clean, tested code, and help shape frameworks and best practices. The role requires 5+ years in software or physics modeling, strong Python skills, and experience with Git and CI/CD in a

Qualifications

• 5+ years of industry experience in software or physics modeling.
• 3+ years of strong proficiency in Python.
• Systems design and architecture mastery of data intensive applications
• Experience with Git and CI/CD pipelines
• Familiarity with Python-based scientific computing libraries (Pandas, NumPy, HDF5, Matplotlib).

Responsibilities

• Collaborate with Mechanical, Nuclear, Structural, Thermal, and Systems Engineers to construct multi-physics simulation tools
• Design, develop, and deploy high-quality, performant, and scalable data-intensive applications using Python
• Write clean, well-documented, and secure code that everyone can contribute to.
• Implement unit tests, integration tests, and help shepherd the frameworks that run them.
• Debug, troubleshoot, and resolve technical issues in a timely and efficient manner.

Skills

Python

Software engineering

Systems design

Collaboration

Problem solving

Tools

Git

CI/CD pipelines

Pandas

NumPy

HDF5

Matplotlib

Django

Job description

About Us

At Antares, our long-term mission is to make clean energy abundant from Earth to the Asteroid Belt. We’re fueled by the belief that advanced nuclear energy can strengthen our military, solve the climate crisis, elevate global living standards, and expand humanity's presence in outer space. To achieve our mission, we’re building mass-producible, inherently safe, deployable microreactors that can be used terrestrially, underwater, and in space.

Formed in 2023, the Antares team hails from SpaceX, The White House, MIT, Rigetti Computing, The Air Force, General Atomics, Relativity Space, Ursa Major, and National Laboratories like Los Alamos, Idaho, and Oak Ridge. Antares has raised over $600M in venture capital from top-tier investors and has over $13M in government funding.

About the Team

As a Senior member of Antares' Software Engineering team, you will take a prominent role in developing our in-house multiphysics simulations: the design, development, and deployment of critical features that allow the company to build end to end predictions of all the applicable physics of nuclear reactors. You'll be a technical leader, collaborating closely with scientists and engineers from others disciplines to bring complex products to life.

Roles & Responsibilities:

• Collaborate with Mechanical, Nuclear, Structural, Thermal, and Systems Engineers to construct multi-physics simulation tools
• Design, develop, and deploy high-quality, performant, and scalable data-intensive applications using Python
• Write clean, well-documented, and secure code that everyone can contribute to.
• Implement unit tests, integration tests, and help shepherd the frameworks that run them.
• Debug, troubleshoot, and resolve technical issues in a timely and efficient manner.

Basic Qualifications:

• 5+ years of industry experience in software or physics modeling
• 3+ years of strong proficiency in Python
• Systems design and architecture mastery of data intensive applications
• Experience with Git and CI/CD pipelines
• Familiarity with Python-based scientific computing libraries (Pandas, NumPy, HDF5, Matplotlib)

Preferred Skills & Experience:

• Excellent communication, collaboration, and problem-solving skills
• A passion for building high-quality software for end users and a desire to learn and grow
• Professional experience with stochastic simulation frameworks, computational geometry, and/or numerical methods
• Additional language and framework experience up the stack (JS/TypeScript/Ruby/Rails/Django)
• Additional language and framework experience down into firmware (C/++/Go/Embedded/RTOS)
• Track record of working within your company to develop valuable, effective internal tools
• Experience working on software for hardware products
• Cloud platforms (e.g., AWS, GCP, Azure) and Cloud Compute
• DevOps principles and Infrastructure as a Service

Culture

At Antares, we like to specifically tie each role to our founding document’s set of values–here are the top five cultural values we think you should believe at your core to be successful:

• Think in Systems - Energy and Defense are complex ecosystems with numerous stakeholders with competing priorities, conflicting policies, perverse incentives, and emergent and path-dependent properties. First principles thinking alone is insufficient. Think probabilistically and then take action. “If you want to be certain, then you are apt to be obsolete.” Over-optimizing the components often degrades the system
• Obsess over the End User - The customer and end user are often not the same. We will never build globally competitive commercial products if we lose sight of our end users and their entire interaction with the product life cycle
• Be Unconstrained by Convention - Our only limits are the laws of physics. Many, even experts, will say what we are working on is impossible. They said the same about SpaceX reusing rockets. Generationally impactful companies, by definition, must accomplish the seemingly impossible. If it was easy, it would have already been done. Never shy away from a solution because it has never been tried before, and never choose to do something because that's “how it's always been done”
• Go Where the Work Is - Never miss a chance to meet a customer, user, stakeholder face to face, even if that means hopping on a plane. If you can’t make it, find a teammate who can channel your intentions and go in your place. Deep work can be done from anywhere, but we believe teams are built in person, and aim to maximize our time together
• Operate in the Grey - Embrace nuance in pursuit of truth. Question every fundamental assumption

Equal Opportunity

Antares is an Equal Opportunity Employer. Employment decisions are based solely on merit, competence, and qualifications, without regard to race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability, or any other legally protected status.

ITAR Requirements

To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR here.