Castelion Corporation is a defense technology company building affordable hypersonic weapons at scale, founded by former SpaceX executives who are applying Apollo-era prototyping philosophy to national security hardware. The company controls critical technologies in-house through vertical integration - a deliberate strategy to eliminate the supply chain bottlenecks and extended timelines that define traditional defense primes. Their development model rejects cost-plus contracts in favor of hardware-rich iteration: constant testing, rapid prototyping, and real-world validation cycles instead of multi-year planning phases.
The technical stack reflects both operational security requirements and modern cloud infrastructure: CrowdStrike and Palo Alto handle endpoint and network security, Splunk provides logging and analytics, while deployments span AWS, Azure, and GCP. Development work involves C/C++ and Python for systems-level engineering, with NodeJS handling web services and Siemens NX/Teamcenter managing CAD and PLM workflows. The threat model here is multi-layered - nation-state actors targeting weapons development IP, supply chain integrity for hardware components, and the operational security demands of classified defense programs.
Castelion's culture prizes velocity over hierarchy, with new hires owning critical projects from day one regardless of seniority. Cross-disciplinary collaboration is required when you're building hypersonic systems that demand mechanical, electrical, software, and materials engineering all moving in lockstep. The security team operates in an environment where urgency isn't marketing speak - it's tied to restoring deterrence capabilities while managing classified data flows, cloud-native deployments, and hardware development cycles that move faster than traditional defense bureaucracy allows.