Allen, Texas, United States · On-site
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Houston, Texas, United States · On-site
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Austin, Texas, United States · On-site
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Houston, Texas, United States · Hybrid
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Houston, Texas, United States · Hybrid
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Carrollton, Texas, United States · On-site
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Austin, Texas, United States · On-site
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Cary, North Carolina, United States · On-site
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Houston, Texas, United States · Remote OK
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Irving, Texas, United States · Hybrid
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Austin, Texas, United States · Hybrid
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Nassau County, Florida, United States · On-site
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Austin, Texas, United States · Remote OK
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Harris County, Texas, United States · On-site
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Dallas, Texas, United States · Hybrid
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Houston, Texas, United States · On-site
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Austin, Texas, United States · Remote OK
$85k/yr
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Dallas, Texas, United States · On-site
$153k–$210k/yr
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Lead the FPGA architecture and development for next-generation Hardware-in-the-Loop (HWIL) test capabilities. Collaborate with multidisciplinary teams to integrate high-fidelity simulations with physical hardware for closed-loop testing.
Requires a Bachelor's degree in Electrical or Computer Engineering and 5+ years of professional FPGA development experience. U.S. citizenship is mandatory, and experience with Xilinx platforms and HLS workflows is highly preferred.
Castelion is 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 HWIL FPGA Engineer, you will lead the FPGA architecture and development for Castelion's next-generation Hardware-in-the-Loop (HWIL) test capability. You will be a foundational member of a multidisciplinary team responsible for building a real-time test environment that enables rapid validation of hardware and algorithms before flight testing.
Working alongside simulation, hardware, electrical, mechanical, software, and guidance engineers, you'll develop FPGA-based solutions that bridge high-fidelity 6-DOF simulation with physical hardware, ultimately enabling fully closed-loop testing in representative mission environments.
This role is ideal for engineers who enjoy solving difficult real-time hardware challenges, working across multiple engineering disciplines, and building systems from the ground up.
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.
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.
Modern Defense Production
Peace through Deterrence
Offices: Torrance, CA, US
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