Software Engineer - Platform

Job TitleArlington, VA, or New York, NY (on-site/hybrid)The platform is a privacy-first mobile carrier built from the ground up, running its own network rather than a layer over legacy infrastructure. Secure cellular service for consumers, businesses, and government, with privacy and security engineered into every layer of the stack, from the device, through contested infrastructure, to the network core. The charge is connectivity without compromise: resilient global connectivity that separates users from the legacy telecom ecosystem.The WorkBuild a best-in-class signaling firewall to detect and mitigate malicious signaling attacksDetect fake base stations (cell-site simulators)Detect and prevent spam and smishing campaignsAlert users transparently when they are actively targeted by hackers or nation statesOwn the full software lifecycle, from problem discovery to delivery, across foundational components of the telecom stackShip reliable, performant, scalable systems that let other product teams build without deep infrastructure expertiseRequired4+ years of professional software engineeringStrong foundation in computer science or a related technical fieldFluency in a modern backend language (Go, Rust, Java/Kotlin, or Python)Solid command of algorithms, data structures, cloud infrastructure, and distributed systemsClear written and verbal communication, fast iteration, high-quality barNice To HaveActive US security clearance, or eligibility and willingness to obtain one