Computational and Software Engineering Intern, Xcimer

12 Week Summer 2027 Internship

Salary not provided

Undergraduate intern: $25 USD per hour, Masters intern: $30/hr, PhD intern: $35/hr

Denver

More information about location

5 days a week in office

Developing carbon-free fusion energy

Be an early applicant

Developing carbon-free fusion energy

101-200 employees

B2BEnergyManufacturingDeep TechScience

Be an early applicant

Salary not provided

Undergraduate intern: $25 USD per hour, Masters intern: $30/hr, PhD intern: $35/hr

Denver

More information about location

5 days a week in office

101-200 employees

B2BEnergyManufacturingDeep TechScience

Company mission

To free humanity from fossil fuels, save the planet from climate change and unlock a new era of progress, prosperity and safety for all.

Job

Company

Role

Who you are

We are seeking interns who are passionate about applying their technical skills, problem-solving abilities, and commitment to quality to drive the future of clean energy!
Qualified candidates must be enrolled in a Bachelor's, Master’s or PhD degree program from an accredited college or university in mechanical engineering, electrical engineer, physics, nuclear engineering, or other related engineering discipline
Application of technical skills outside of the classroom (examples include: extracurricular projects, volunteering, personal projects, laboratory research, or prior internship/work experience)
Proficiency in CAD software for 3D modeling and simulation
Strong written, verbal, communication, and interpersonal skills
Passion for fusion energy!
Ability to work full-time onsite through the duration of the 12 week internship program in Denver, CO
Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum

What the job involves

Join Xcimer’s engineering internship program and gain hands-on experience in designing and building cutting-edge laser-driven inertial fusion hardware and software
As an intern, you will be integral to developing the systems needed for the world’s first commercial fusion energy power plant
During this 12-week program at our headquarters in Denver, CO, you’ll work alongside an industry expert mentor to tackle complex, real-world challenges in fields such as structures, mechanisms, optics, pulsed power, computational engineering, plasma physics, and manufacturing
Responsibilities will vary depending on each intern's are of expertise and interests:
Mechanical design and hardware development
Mechanical and thermal analysis using finite element analysis
Systems engineering
Manufacturing engineering
Electrical engineering (pulsed power)
Control systems engineering
Computational and software engineering (simulations)
Nuclear engineering
Optical engineering
Plasma physics

Application process

Application close date: 12/31/2026

Our take

The need for safe, reliable, and zero-carbon energy is urgent. Fossil fuels cause significant emissions and environmental harm, while renewables like wind and solar are limited by their intermittent nature. This has intensified the search for sustainable solutions, with nuclear fusion standing out.

Xcimer is advancing laser-driven inertial fusion technology to address this energy problem. Leveraging decades of research and advancements in technology, the company hopes to enhance the efficiency and scalability of fusion energy production.

In a nutshell, the company is developing the world's highest-energy laser system, using innovative techniques to scale fusion generation to industrial levels. This approach has the potential to make fusion a viable and economical energy source - having a significant effect on global energy woes.

With a successful round of fundraising in 2024, Xcimer is set to advance its technological and commercialisation efforts. It turned on its prototype Phoenix laser in 2026, a step towards its aim of building a fusion powerplant. However, its first iteration is just a fraction of the power needed to make Xcimer's dreams a profitable reality. A $9 million award from the US Department of Energy further highlights the value of bringing the promise of fusion power closer to a working form of energy.

Steph

Company Specialist at Welcome to the Jungle

Company

Company benefits

Medical, Dental, Vision
Basic and supplemental life insurance
Paid parental leave
Short and long-term disability
401(k) with company match of up to 6%
Paid Time Off: 15 days per year based on weekly scheduled hours
10 paid sick leave
13 company-paid holidays
Equity for eligible employees

Company HQ

Central Park, Denver, CO

Leadership

Conner Galloway

(Co-Founder & CEO)

Previously a Technical Lead at AliveCor. Also served as a Chief Scientist at IE Energy Partners.

Alexander Valys

(Co-Founder & CTO)

Previously a Staff Engineer at Meta. Prior to that, they were Director of Engineering at AliveCor and the Vice President of IE Energy Partners.

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