Principal RF Systems & Hardware Engineer

Job Description About the CompanyThis aerospace startup is revolutionizing the skies by developing high-altitude, solar-powered UAVs designed for real-time next-gen communication capabilities. With ambitions to surpass traditional satellite and ground-based technologies, the team is pioneering a new era of connectivity — one that will redefine global communications and access for underserved regions. Their vision is to become a trailblazer in solar-powered aviation, reshaping the future of autonomous UAVs and setting a new standard for how the world connects from above.This company has a powerhouse team and the network/tech to surpass competitors.We prefer this person to be located in the Bay Area and be onsite at headquarters, but for the right person we may be able to make a hybrid/remote exception for someone in LA or Seattle.About the RoleWe are looking for a Principal RF Systems & Hardware Engineer to lead the definition and execution of our communication payloads. You will bridge the gap between high-level system theory and board-level reality. This is a hands-on role where you will not only define the architecture and link budgets but also select critical components, design the signal chain, and bring up the radio hardware in the lab.What You'll OwnDefine the end-to-end RF signal chain from the digital interface to the antenna port, ensuring link budgets and coverage goals are met.Lead the evaluation and selection of critical active RF components, including Power Amplifiers (PAs), Low Noise Amplifiers (LNAs), ADCs/DACs, mixers, and filters.Design and prototype high-performance RF subsystems, including schematic capture, board layout oversight, and bring-up of custom radio hardware.Conduct hands-on bench testing to characterize component performance (linearity, noise figure, compression) and validate system-level specifications.Interface with chipset vendors and semiconductor manufacturers to source the best silicon for our unique constraints.Work with the digital engineering team on data converter interfaces and the antenna team on impedance matching and integration.What They're Looking ForDeep experience designing and debugging RF transmit/receive chains, specifically with direct conversion or superheterodyne architectures.Strong grasp of A2D/D2A converters, sampling theory, and PA/LNA linearization techniques.Ability to solder, tune, and debug RF circuits on the bench using signal generators, spectrum analyzers, and oscilloscopes.Experience with link budgeting, cascade analysis (gain, NF, IP3), and frequency planning for cellular or satellite systems.Familiarity with modern modulation schemes and standards (LTE, 5G NR, DVB-S2).A bias for action and comfort with early-stage prototyping and ambiguity.Benefits Why You'll Love Working at this StartupJoin a powerhouse team of brilliant buildersCollaborate with a tight-knit crew of deeply technical and business-savvy innovators. You will work alongside leaders with a star-studded history of Silicon Valley success who are passionate about creating something industry shifting.Competitive startup salaryBe paid well to do the most energizing work of your career.Ground-floor equityOwn meaningful upside from day one. This is your chance to shape the company's trajectory and participate fully in the value you help create.Excellent health insuranceEnjoy strong medical coverage for employees so you can stay healthy while pushing boundaries.Dog-friendly office with Bay viewsBring your pup and enjoy a beautiful workspace with panoramic water views that spark creativity and joy.About AdAstraAdAstra Talent Advisors is a headhunting and talent advising firm focused on the Climate, Space, and Defense sectors of Hard Tech. We specialize in pairing highly technical and executive talent with some of the world's leading Hard Tech startups.At AdAstra, we catalyze the innovations that future generations depend on by placing the right people in the right seats. Our dedicated work enables inconceivable technology from Earth, to the stars. And it's all because of trailblazing talent like you - those driven to do what's never been done before.We care about long term relationships with both candidates and companies. Even if the role we initially discuss isn't a perfect fit, it's likely we'll have something relevant to share with you in the future.Join us on our journey by following along via LinkedIn!CEO, Seyka Mejeur | LinkedIn profileCTO / COO, Brian Mejeur | LinkedIn profileAdAstra Talent Advisors | LinkedIn profileAdAstra Website