Simulation Software Engineering Internship (Spring or Summer 2027)

Spacecraft represent the most pressing unmet need across the entire aerospace industry. As more launch vehicles come online and the cost to orbit decreases, more companies launching payloads to space continue to emerge. For the first time in history, this influx of payload companies combined with reduced launch costs has resulted in a massive increase in need for commercial spacecraft platforms, known as satellite buses. These buses hold the payloads of our customers and are flown on launch vehicles. Apex manufactures these satellite buses at scale using a combination of software, vertical integration, and hardware that is designed for manufacturing. Our spacecraft enable the future of society: ranging from earth observation to communications and more. We’d love for you to join us on our mission of providing humankind access to the galaxy beyond our planet.

We are seeking talented engineers to work closely with the broader engineering team for an exciting internship opportunity. This person is passionate about engineering, ready to take ownership over complex challenges, and a strong desire to learn about all things satellites. You will have an opportunity to approach this from a fresh perspective targeting an end result indexed on reliability and efficiency. This will require innovation and creativity to ultimately disrupt and make an impact on the industry. During the 12-week internship program at Apex, you'll gain hands-on experience and professional growth opportunities. You’ll be assigned a project to give you the opportunity to have real impact. Throughout the project you'll have a dedicated mentor to guide you, while participating in learning sessions to elevate your knowledge of aerospace. Plus, you'll connect with peers and industry professionals during our community events, making this a well-rounded experience to launch your career! Simulation Software Engineering: Interns will contribute to developing closed-loop spacecraft test platforms, such as six degrees of freedom simulation platform (6DOF), software-in-the-loop (SITL) and hardware-in-the-loop (HITL) and executing simulation testing strategies to validate and verify the performance, functionality, and reliability of satellite systems.

Graduating in the Fall of 2026 or in the Spring of 2027 BS or MS in Computer Science, Computer Engineering, Electrical Engineering, Aerospace Engineering, or a related field Proficiency in programming languages such as C/C++ Experience with modeling and embedded system is a plus.   Why Join Apex? Apex believes in creating a work environment that you look forward to embracing every day. Our employees love working at Apex, and we want you to love it too. We're a fast-growing startup that has raised more than $500M in funding, and we invest heavily in our people from day one.

For Full-time Employees: Shared upside: Receive equity in Apex, letting you benefit from the work you create Best-in-class healthcare: 100% company-paid medical, dental, and vision for you and your dependents, plus $100k life insurance at no cost Comprehensive PTO package to reset and recharge - starting at 15 days vacation, growing to 20+ days annually, plus 10 paid holidays Competitive 401(k) plan with generous matching - 100% match on first 3%, 50% on next 2% 8 weeks paid parental leave plus childcare reimbursement up to $350/day for work-related travel Daily catered lunch and unlimited snacks to keep you fueled throughout the day Vibrant community: Monthly office socials, pickleball tournaments, run club, and gatherings for you and your family Your dream desk setup and all the tools you need to be your most productive self World-class Playa Vista office with the benefit of in-person collaboration with amazing coworkers and flexibility to integrate work and life Real impact opportunity: Work alongside experts from aerospace, new space, and other cutting-edge industries to make a lasting difference Ready to