Senior Algorithm Engineer Jobs (NOW HIRING)

WhyCastelion, 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.

Senior Radar Algorithm Engineer

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.

Responsibilities

• 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

Basic Qualifications

• 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)

Preferred Skills and Experience

• 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

Additional Requirements

• 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

Other Duties
Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice.

Benefits And Perks

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.

Affirmative Action/EEO Statement
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.