Backend Engineer Intern Jobs in Fullerton, CA (NOW HIRING)

Hadrian is building autonomous factories to reindustrialize America. By combining AI, advanced software, robotics, and full-stack manufacturing, we help aerospace and defense companies build rockets, satellites, aircraft, ships, and other mission-critical systems up to 10x faster and at significantly lower cost.

Following our $1.37B Series D at a $7.87B valuation, Hadrian is rapidly expanding our manufacturing footprint, launching new capabilities across welding, casting, forging, electronics, additive manufacturing, and more, while scaling our Factory-as-a-Service platform to transform how critical products are built.

Backed by leading investors including JPMorgan Chase, Valor Equity Partners, Andreessen Horowitz, Founders Fund, 137 Ventures, Lux Capital, T. Rowe Price, and Morgan Stanley, we’re building the future of American manufacturing—and looking for exceptional people to help make it happen.

If you’re ready to take on the most challenging and rewarding work of your career while helping create American manufacturing jobs for generations to come, you’re exactly who we’re looking for.

The Role:

Hadrian is looking for a Software Engineer Intern to join the team building the software backbone of our autonomous factory. You'll work alongside experienced engineers on real production systems from internal tooling and data pipelines to the software that powers factory operations and customer-facing workflows. This is a hands-on role where your code will ship, and your contributions will directly impact how Hadrian scales.

What You’ll Do

• Build and improve internal tools, dashboards, and automation systems that support factory operations

• Contribute to backend services, APIs, and data pipelines used across engineering, operations, and quality teams

• Help design and implement features that improve visibility into production workflows, capacity, and program status

• Collaborate with cross-functional teams including operations, program management, and quality to understand requirements and deliver software solutions

• Write clean, well-tested code and participate in code reviews

• Surface technical risks and contribute to architectural discussions

What We’re Looking For

• Current university student pursuing a Bachelor's or Master's degree in Computer Science or a related field, with an expected graduation date between December 2027 and June 2028

• Proficiency in one or more programming languages (Python, TypeScript, Go, or similar)

• Familiarity with backend development, APIs, or data engineering

• Strong problem-solving skills and ability to work through ambiguous technical challenges

• Clear written and verbal communication

• Strong attention to detail and follow-through

• Excitement for manufacturing, aerospace, defense, or industrial systems

• Comfortable working in a fast-moving, highly ambiguous environment

• Willingness to work on-site in Los Angeles, CA

• Internships are available for our Fall 2026, Spring 2027, and Summer 2027 cohorts. Indicate your preferred term(s) when applying

What Will Set You Apart

• Prior internship or project experience shipping production software

• Interest in manufacturing systems, automation, or industrial software

What you’ll Gain

• Hands-on experience building software for a high-growth, mission-driven industrial company

• Direct involvement in real production systems, not just internal tools or side projects

• A front-row seat to how Hadrian is transforming aerospace and defense manufacturing through software, automation, and data

Compensation

For this role, the target hourly range is $46.15 - $50.71

This reflects the lowest to highest hourly rate we reasonably and in good faith believe we would pay for this intern position at the time of this posting. We may ultimately pay more or less than the posted range, and the range is subject to change. An intern's hourly rate within this range will be based on several factors, including, but not limited to relevant education, prior experience, skills, geographic location, and the nature of the internship assignment.

Intern Benefits

Housing support may be available based on business need.

• Medical, dental, vision, and life insurance plans for employees

• 401k

• Relocation support may be provided for certain situations, based on business need.

• Flexible vacation policy

• Equity

To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR here.

Hadrian uses AI-assisted tools in our recruiting and hiring processes to help our team work more efficiently. This may include tools that help organize and analyze recruiting data, as well as an AI-powered notetaker that can record and transcribe interviews and help coordinate feedback. These tools support our team and are not used to make hiring decisions. All candidate evaluations and hiring decisions are performed by humans. If an interview will be recorded, you will be notified in advance and may opt out at any time with no impact on your candidacy. Candidate data processed through these tools is subject to the same protections described in our Privacy Policy.

It is the Company’s policy to provide equal employment opportunity for all applicants and employees. The Company does not unlawfully discriminate on the basis of race inclusive of traits historically associated with race (including, but not limited to, hair texture and protective hairstyles, such as braids, locks and twists), color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, transgender status, national origin (including, in California, possession of a drivers license), ancestry, citizenship, age, physical or mental disability, height or weight, medical condition, family care status, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, exercise of reproductive rights, any other basis protected by local, state, or federal laws, or any combination of the above characteristics. When necessary, the Company also makes reasonable accommodations for disabled candidates and employees, including for candidates or employees who are disabled by pregnancy, childbirth, or related medical conditions.