Castelion · 1 week ago
Software Engineer - Platform Integration
Torrance, CA
Full-time
Onsite
Mid Level
$130K/yr - $185K/yr
3+ years expCastelion is innovating defense development and production, focusing on advanced weapon systems. They are seeking a Software Engineer - Platform Integration to develop embedded software for hypersonic weapon systems, ensuring integration with various launch platforms through protocol implementation and system communication.
AerospaceGovernmentManufacturingMilitaryNational Security
No H1B
Security Clearance RequiredU.S. Citizen OnlyHiring Manager
Nicholas Sparks
Responsibilities
Develop and validate software interfaces using UAI, MIL-STD-1760, MIL-STD-1553, and CANbus
Support integration with Fire Control Systems (FCS) and Operational Flight Programs (OFPs) to enable real-time command & control
Translate Interface Control Documents (ICDs) into clear, testable software modules that meet timing, safety, and operational requirements
Build and maintain hardware-in-the-loop (HIL) and software-in-the-loop (SIL) test environments for simulation and validation
Work cross-functionally with avionics, GNC, and mission software teams to ensure end-to-end system integration and performance
Participate in lab, simulation, and field testing of integrated weapon systems
Qualification
Required
Bachelor's degree in Computer Science, Electrical/Computer Engineering, or a related field
3+ years of professional experience in software engineering
Proficiency in one or more modern programming languages such as Python, C++, Rust, Go, or JavaScript
Familiarity with embedded systems, communication protocols, and hardware/software integration
U.S. Citizenship and eligibility for a Top Secret/SCI clearance
Preferred
Experience working with defense/aerospace protocols such as UAI, MIL-STD-1553, MIL-STD-1760, or CANbus
Exposure to avionics, payload integration, or weapons interface development
Hands-on experience with SIL/HIL test environments
Active Top Secret/SCI clearance
Benefits
Long-term stock incentives
Comprehensive medical, vision, and dental insurance
Four weeks of paid time off per year
Company
Castelion
Castelion is a defense tech company that applies modern hardware development and manufacturing processes to national security challenges.
51-200 employees
Funding
Current Stage
Growth StageTotal Funding
$469.61MKey Investors
Lightspeed Venture PartnersSilicon Valley BankAndreessen Horowitz
2025-12-05Series B· $350M
2025-01-29Series A· $70M
2025-01-29Debt Financing· $30M
Leadership Team
Bryon Hargis
Founder // CEO
Andrew Kreitz
Co-Founder and CFO
Recent News
alleywatch.com
2026-01-23
Company data provided by crunchbase