Senior Software Engineer / RF Systems

About Us: Quartermaster is building the world's most comprehensive maritime intelligence platform. Our SmartMast™ system transforms commercial and civilian vessels into a persistent, distributed sensing network—combining HD video, AI, radar, RF sensing, and AIS to deliver real-time maritime domain awareness at global scale. With 600+ sensors deployed across 25+ countries and more than 400,000 vessels identified outside of AIS, we are setting a new standard for what ocean surveillance and safety can look like. We are a mission-driven, high-velocity team building dual-use technology for defense agencies, coast guards, and commercial maritime operators.

Job Description: We are looking for a Senior Software Engineer to help build the software backbone of Quartermaster's RF sensing platform—the edge applications, distributed data pipelines, and cloud services that turn raw spectrum captured on vessels around the world into actionable maritime intelligence. You will work alongside RF, FPGA, and hardware engineers to take signal processing from the lab bench to a deployed fleet: writing high-performance, hardware-aware code that runs on compute-constrained embedded Linux at the mast, moving timestamped IQ data and detections reliably from ship to cloud, and processing that data at scale as our sensor network grows into the thousands.

This role sits at the inter