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AST SpaceMobile is building the first and only global cellular broadband network in space to operate directly with standard, unmodified mobile devices based on our extensive IP and patent portfolio and designed for both commercial and government applications. Our engineers and space scientists are on a mission to eliminate the connectivity gaps faced by today’s five billion mobile subscribers and finally bring broadband to the billions who remain unconnected. Position Overview We are seeking a highly skilled High-Speed Hardware Engineer (RF & Digital Systems) to design and develop advanced electronic systems for next-generation satellite and telecommunications platforms. The role focuses on high-frequency and high-data-rate hardware development across the full product lifecycle, ensuring robust performance, reliability, and compliance with industry standards. Key Responsibilities • Design high-speed multilayer PCBs with controlled impedance. • Develop high-speed digital interfaces such as DDR, PCIe, Ethernet, and SerDes. • Ensure signal integrity and power integrity across complex electronic systems. • Design and integrate RF and mixed-signal circuits. • Perform schematic design, layout supervision, and PCB stack-up definition. • Conduct signal integrity and RF simulations to validate designs. • Support hardware validation, testing, debugging, and troubleshooting activities. • Collaborate with FPGA, RF, and system engineering teams to ensure successful product integration. • Prepare technical documentation and support manufacturing and production processes. Qualifications Education: • Bachelor’s degree in Electrical Engineering, Telecommunications Engineering, or a related field. Experience: • A minimum of 5 years of experience in high-speed hardware design. • Strong experience using PCB design tools such as Altium Designer or Cadence. • Solid knowledge of signal integrity principles and transmission line theory. • Experience with high-speed communication protocols including PCIe, Ethernet, DDR, and SerDes. • Hands-on laboratory experience using oscilloscopes, spectrum analyzers, and related test equipment. Preferred Qualifications: • RF design experience in the GHz frequency range. • Experience within satellite, aerospace, or telecommunications industries. • Familiarity with FPGA-based systems. • Experience with simulation tools such as HyperLynx, ADS, and HFSS. • Knowledge of EMC/EMI standards and compliance requirements. Soft Skills: • Strong analytical and problem-solving skills. • Excellent attention to detail. • Strong written and verbal communication skills. • Proven ability to collaborate effectively within cross-functional teams. • Strong organizational and project management skills. • Ability to work independently and manage multiple priorities. • Results-oriented mindset with a commitment to quality and continuous improvement. Technology Stack: • Altium Designer. • Cadence Design Systems. • HyperLynx. • ADS (Advanced Design System). • HFSS. • Oscilloscopes. • Spectrum analyzers and electronic test equipment. • PCB design and simulation tools. • Microsoft Office Suite. Physical Requirements • Ability to work in a standard office environment and use a computer for extended periods. • Ability to work in laboratory environments and interact safely with electronic test equipment. • Ability to perform hardware testing, validation, and debugging activities. • May require occasional travel to support testing, integration, manufacturing, or customer activities. • Ability to handle electronic hardware and laboratory equipment as required.             This job description may not be inclusive to the duties and responsibilities listed. Additional tasks may be assigned to the employee from time to time or the scope of the job may chan