Embedded Software Engineer Torrance, CA Software Engineering On-Site

About the job Staff Embedded Software Engineer

About Castelion

Castelion is bringing a new approach to defense development and production: one that focuses on short, iterative design cycles, rapid testing in development, and modern commercial manufacturing strategies for production e designing, building, and testing next generation long range strike weapons systems to give America and its Allies a definitive edge and deter future conflicts.

As a Staff Embedded Software Engineer you will be at the forefront of creating, developing, and testing the software that drives and simulates our flight systems. Your role involves close collaboration with fellow Castelion engineers across software and hardware domains to implement and debug software across the entire technology stack from applications and operating systems to networking, firmware, and simulation, ensuring complete mission success.

We seek intelligent, collaborative, and driven engineers of all levels who are passionate about problem-solving and eager to contribute to an extraordinary mission. If you thrive in challenging environments and are excited by the prospect of making a tangible impact, we want to hear from you.

• Autonomous Systems:
  Design and implement reliable autonomous software systems, along with the simulations required to validate their precision and dependability.
• Comprehensive Software Development:
  Manage the entire software development process, from initial design, prototyping, and testing, to final integration and deployment for mission-critical applications.
• System Testing:
  Evaluate test outcomes and troubleshoot issues necessitating detailed investigations, including hands‑on integration and debugging of hardware/software systems. Develop tools to facilitate testing across various environments: virtualized hardware, real hardware‑in‑the‑loop, and vehicle‑in‑the‑loop testing.
• Collaboration:
  
  Partner with multidisciplinary engineering teams to brainstorm, design, and develop next‑generation hypersonic missile capabilities, including advanced guidance algorithms and integrated seeker image processing.
• Project Leadership:
  Lead major projects that propel Castelion’s mission forward, ensuring alignment with overall objectives and occasionally traveling to launch and customer sites for testing and operations.
• Enhance Standards and Practices:
  Continuously improve software standards and best practices within the software team, fostering an environment of ongoing improvement and innovation.

• Educational Background:
  Bachelor’s degree in Computer Science, Computer Engineering, Electrical Engineering, Mathematics, or a related STEM field, or equivalent practical experience.
• Experience:
  
  Typically requires 8+ years of professional software engineering experience, or equivalent hands‑on experience through industry work, advanced research, or significant technical contributions.
• Technical Proficiency:
  Deep experience with systems programming in languages such as C++, Python, or Rust, and strong proficiency in Linux-based development environments. Experience may include work with low‑level systems such as Linux kernel development, hardware interfaces, or driver development (e.g., UART, I2C, or similar peripherals), with demonstrated ability to architect systems, make cross-disciplinary technical decisions, and lead development of complex, integrated software and hardware systems.

• Programming Expertise: Proven proficiency in C++, Rust, or similar systems programming languages.
• System
  
  Experience:
  
  Practical experience with real‑time embedded systems or distributed computing environments in Linux-based systems, including developing high-quality Linux-based C++ software for common processors and microcontrollers (e.g., Power
  
  PC, x86, ARM).
• Technical
  
  Skills:
  
  Proficiency in Linux, including Bash shell scripting, network troubleshooting, and performance analysis (strace, ftrace, etc.), with strong skills in debugging, performance optimization, and unit testing.
• System Knowledge:
  Comprehensive understanding of computer architecture and networking protocols (TCP, UDP,…