Senior Radar Algorithm Engineer

Why Castelion, Why Now

Castelionis moving incredibly fast to develop and deliver advanced defense systems at a time when execution matters more than ever. We believe focus and technical excellence are decisive advantages - and we are building a team that can deliver real capability, not just concepts.

This is a rare opportunity to join at an early stage, where your work will directly shape critical systems, influence major technical decisions, and have immediate, real-world impact.

As a Senior Radar Algorithm Engineer, you will develop and deploy advanced algorithms for air-to-air radar systems operating in contested, modern electronic warfare environments. This role goes beyond theory - you will own the full lifecycle from algorithm design through production-ready implementation, validation, and integration into real hardware systems.

• Own end-to-end development of air-to-air radar algorithms—from concept through production—ensuring performance, affordability, testability, and scalability
• Design, implement, and validate radar mode logic in Python or Rust, delivering robust performance in modern electronic warfare environments
• Develop and execute verification and validation plans across simulation, chamber testing, captive flight, and live-fire scenarios, including calibration considerations
• Operate within a disciplined software engineering environment, leveraging version control, code reviews, CI/CD, and testing frameworks

• Bachelor's or Master's degree in Electrical Engineering, Computer Science, Physics, or a related technical field
• Direct experience with air-to-air radar systems and associated algorithms
• Strong background in signal processing, detection, tracking, and radar modes
• Proficiency in Python and/or Rust, with experience writing production-quality code
• Ability to operate in a disciplined software engineering environment (e.g., Git, code reviews, testing, issue tracking tools like Jira)

• Experience working in electronic warfare or contested RF environments
• Background in taking algorithms from concept through deployment on hardware systems
• Familiarity with radar system calibration, integration, and test across multiple environments
• Experience building scalable, maintainable software architectures for real-time systems

• Ability to put in extended hours, including evenings and weekends, when required to meet aggressive timelines
• This role is based in Allen, TX and requires full-time onsite presence

All full-time employees are granted meaningful long-term equity, sharing in the company's significant growth trajectory. We offer four (4) weeks of paid time off, ten (10) company-paid holidays, and comprehensive health benefits-including 100% employee-covered medical and strong dependent coverage, along with dental and vision plans. We also provide paid parental leave to support growing families, a $100 monthly fitness stipend to promote health and performance, and onsite EV charging for convenience.

In addition, employees enjoy perks like catered meals, company-covered food during high-demand periods, and a fully stocked kitchen to stay fueled throughout the day.

While this position does not currently require a U.S government-issued security clearance, it may in the near future. Therefore, the ability to obtain and maintain a U.S. government–issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Employment with Castelion is governed on the basis of competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.