Note: The job is a remote job and is open to candidates in USA. AdAstra Talent Advisors is an aerospace startup revolutionizing the skies with high-altitude, solar-powered UAVs. They are seeking a Principal RF Systems & Hardware Engineer to lead the definition and execution of communication payloads, bridging high-level system theory with practical hardware implementation.
Responsibilities
- Define 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
Skills
- Deep 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
- Competitive startup salary
- Ground-floor equity
- Excellent health insurance
- Dog-friendly office with Bay views
Company Overview