AST SpaceMobile is building the first and only integral 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 skilled and detail-oriented

RF Engineer Lead

to design, develop, test, and maintain radio frequency systems and components. The ideal candidate will work on wireless communication systems, ensuring optimal performance, compliance with industry standards, and reliability across applications such as telecommunications, satellite systems, and IoT devices.
Key Responsibilities

Design, develop, and optimize RF circuits, systems, and components, including antennas, amplifiers, and filters.
Conduct RF modeling, simulation, and performance analysis for S-band, UHF, and GPS systems.




Perform acceptance testing of RF systems and equipment.
Execute testing, validation, troubleshooting, and performance verification activities.
Ensure compliance with applicable regulatory and industry standards (e.g., FCC, CE).
Collaborate with cross-functional teams including hardware, software, and product engineering teams.
Analyze signal propagation, interference, and electromagnetic compatibility (EMC) issues.
Develop and maintain technical documentation, including design specifications, test reports, and user manuals.
Support field testing, installation, and system integration activities.
Monitor system performance and implement improvements to enhance reliability and efficiency.
Qualifications

Education

Bachelor’s degree in Electrical Engineering, Electronics Engineering, or a related field.
Experience

A minimum of 3 years of experience in RF Engineering or a related field.
Proven experience i

📌 Radiation Engineer (Madrid)
🏢 AST SpaceMobile
📍 Madrid