Castelion
Mission Software Engineer
Torrance, CA +1 · Full-time · Posted Sep 28, 2026
- Location
- Torrance, CA
19951 Mariner Ave, Torance, CA 90503 - Experience
- 3+ years of professional software engineering experience.
- Education
- Bachelor's degree in Computer Science, Computer Engineering, Electrical Engineering, Aerospace Engineering, or a related technical field.
- Visa sponsorship
- Ability to obtain and maintain a U.S. security clearance is required. Employment is contingent on the ability to access applicable export-controlled information without additional export licensing; citizenship or other eligibility requirements may apply if imposed by law, regulation, or contract.
About the job
Build and integrate production mission software connecting Castelion’s weapons, launchers, sensors, command-and-control systems, operators, and external platforms from mission planning through testing and operational use.
What you'll do
- Develop, test, and deploy software, APIs, services, and data pipelines for mission systems and command-and-control.
- Integrate systems across software, hardware, networks, and tactical interfaces; debug issues and support laboratory, ground, and flight testing.
- Own software capabilities from requirements and architecture through implementation, testing, deployment, and fielding.
What they ask for
- Bachelor’s degree in Computer Science, Computer Engineering, Electrical Engineering, Aerospace Engineering, or a related technical field.
- 3+ years of professional software engineering experience.
- Software development experience in C++, Rust, Python, Go, C, or similar languages, plus experience with Git, code review, automated testing, and CI/CD.
- Ability to obtain and maintain a U.S. security clearance; role requires full-time onsite presence in Torrance, CA.
Nice to have
- Experience with mission planning, C2, fire control, targeting, autonomy, sensor integration, or weapon-system software.
- Experience with tactical interfaces, embedded or real-time systems, Linux-based applications, or SIL/HIL and flight-test environments.
Tools
C++, Rust, Python, Go, C, Git, CI/CD, MIL-STD-1553
Model-written summary · the original posting is authoritative