Avionics Hardware Engineer, Senior, Staff

We are hiring experienced Avionics Hardware Engineers to specialize in high-speed digital design, flight computer architecture, and advanced avionics hardware development across our avionics organization. This role is ideal for engineers with deep EE fundamentals and hands-on ownership experience designing complex embedded hardware for mission-critical systems.

Engineers in this role focus on flight computer architecture, high-speed digital board design, system bring-up, and hardware validation across real flight hardware. The ideal candidate has experience owning complex board designs from architecture through integration and thrives in fast-paced hardware development environments.

Responsibilities

• Design and develop advanced board-level electrical hardware including schematic capture, PCB layout oversight, component selection, and interface definition
• Own high-speed digital and embedded flight computer architectures including processors, memory systems, and board-level integration
• Perform board bring-up, validation, debugging, and root-cause analysis in the lab
• Test reference boards and early prototypes using standard lab equipment
• Drive signal integrity, power integrity, and hardware reliability considerations throughout the design lifecycle
• Work with avionics, embedded software, test, and manufacturing teams to iterate designs quickly
• Support hardware/software integration and troubleshooting across avionics platforms
• Document designs, test results, and engineering changes clearly

Avionics, Computer Engineering, Avionics, Computer Engineering, Computer Architecture, Graphic Design, Hardware Development, Embedded Hardware, Hardware Design, Digital Circuit Design, * Bachelor’s degree in electrical engineering or related field

• Strong experience with complex digital or mixed-signal hardware design
• Experience with high-speed digital systems, embedded processors, memory interfaces, and board-level architecture
• Experience with PCB design tools (Altium preferred)
• Hands-on experience with oscilloscopes, logic analyzers, and power supplies
• Strong understanding of core EE principles including digital systems, signal integrity, power distribution, and hardware debugging
• Comfortable working in a fast-paced, highly collaborative environment, * Experience owning flight computer, avionics, or embedded compute hardware architectures
• Experience taking complex PCBAs from concept through bring-up, validation, and integration
• Exposure to embedded systems, firmware, or FPGA interaction
• Familiarity with aerospace, automotive, robotics, defense, or other high-reliability hardware environments
• Familiarity with interfaces such as Ethernet, SPI, I2C, UART, CAN, PCIe, or DDR memory systems
• Basic scripting or programming experience (Python, C/C++)

Why Castelion, Why Now

Castelion is moving incredibly fast to develop and deliver advanced defense systems at a time when execution matters more than ever. We believe focus, ownership, and excellence are decisive advantages - and we’re building a world-class team to turn bold ideas into real capability.

This is a rare opportunity to join at an early stage, where you’ll have significant ownership, collaborate with exceptional teammates, and make a direct, measurable impact on our mission and the future of the company - regardless of your function.