Lead Mission Software Architect

Castelion Corporation; Torrance (CA); On-site; USD 180,000 - 240,000; Full time

Job summary

Castelion Corporation seeks a Lead, Mission Software Engineer to define and build software that unites products into a cohesive mission capability. You will own major software components, shape architecture across the mission stack, and drive interfaces between systems for end‑to‑end operation.

This hands‑on leadership role requires mentoring engineers, guiding complex integrations from concept to flight test, and delivering production code with modern Git workflows and CI/CD. A U.S.

Qualifications

• Bachelor’s degree in Computer Science, Computer Engineering, Electrical Engineering, Aerospace Engineering, or a related technical field.
• 7+ years of professional software engineering experience.
• Experience owning and delivering complex software systems or major software capabilities.
• Experience designing software architectures and interfaces across distributed or integrated systems.
• Experience contributing to and leading development in a production software codebase using Git, code review, automated testing, and CI/CD.
• Strong understanding of software architecture, APIs, networking, data serialization, concurrency, and distributed systems.
• Experience developing software that interfaces with hardware, embedded systems, or external services.
• Experience debugging complex integrated software systems across software and hardware boundaries.
• Ability to lead ambiguous technical efforts and drive them from initial definition through implementation and test.
• Strong communication skills and the ability to work across software, hardware, systems, operations, and customer teams.
• Ability to obtain and maintain a U.S. security clearance.

Responsibilities

• Lead the architecture, development, integration, and deployment of mission software across weapons, launchers, C2 systems, sensors, and mission planning.
• Own major software capabilities from early requirements and architecture through implementation, integration, test, and operational deployment.
• Develop and integrate command-and-control software connecting operators, sensors, weapons, launchers, tactical networks, and external platforms.
• Define software architectures, APIs, data models, and interfaces that allow Castelion products to operate together as an integrated mission system.
• Develop software interfaces between Castelion products and aircraft, launchers, mission computers, fire‑control systems, sensors, and government C2 systems.
• Implement communications across interfaces and protocols such as Ethernet, TCP/UDP, CAN, MIL‑STD‑1553, MIL‑STD‑1760, and other tactical interfaces.
• Translate operational concepts, system requirements, and ICDs into scalable software architectures and production implementations.
• Build tools, simulators, and test infrastructure for software‑in‑the‑loop, hardware‑in‑the‑loop, and system‑level testing.
• Lead debugging and root‑cause efforts for complex issues spanning application software, embedded systems, networks, avionics, sensors, and hardware.
• Write and review production code using modern Git‑based workflows, automated testing, and continuous integration.
• Establish strong software engineering practices around code quality, testability, interfaces, and system architecture.
• Mentor software engineers and provide technical guidance across mission software efforts.
• Partner closely with flight software, avionics, guidance and navigation, vehicle engineering, test, and integration teams.
• Work directly with government customers, platform partners, operators, and external engineering teams during integration and fielding.
• Support integration and test activities from laboratory testing through ground and flight test.

Skills

Software architecture

Distributed systems

Leadership

Git workflows

Communication

Mentoring

Security clearance

Education

Bachelor's degree in Computer Science or related technical field

Tools

Git

CI/CD

Linux

Job description

Castelion Corporation seeks a Lead, Mission Software Engineer to define and build software that unites products into a cohesive mission capability. You will own major software components, shape architecture across the mission stack, and drive interfaces between systems for end‑to‑end operation.

This hands‑on leadership role requires mentoring engineers, guiding complex integrations from concept to flight test, and delivering production code with modern Git workflows and CI/CD. A U.S.