Staff Cellular Software Engineer

United States of America

Full Time

4 days ago

$190,000 - $290,000 USD

H1B Sponsor Likely

Key skills

Linux/POSIX systemsCellular software developmentModem control interface layersQualcomm TelSDKQMIAndroid RILCellular data integrationRoutingFirewallsTetheringVPNsWiFi and cellular handoffsPacket capture analysisC programmingC++ programmingJava programmingRadio and operating system debuggingIMS system integrationVoLTEVoWiFiEmergency calling flowsQoS policy4G/5G device behaviorNetwork selection policiesRoaming behaviorDual-SIM/DSDS state managementeSIM/eUICC userland flowsActivation and provisioning UXProfile managementSecure storageLifecycle and error recoveryAutomation for cellular reliabilityLab harnessesSimulated networksTest plansTelemetry-driven regression detectionModem control-plane interfacesMBIMAT-style commandsPower and thermal coordinationConnectivity policyJavaC++CAndroidCommunication

About this role

General Motors is looking for cellular experts to join their vehicle communication team as a Staff Cellular Software Engineer. The role involves designing and developing cellular software for their Linux-based networking system, ensuring reliable connectivity experiences in vehicles.

Responsibilities:

Design and develop cellular software in our Linux-based networking system
Work closely with hardware teams to meet the tough power, signal, and reliability requirements of vehicles
Work closely with our application and cloud teams to ensure end-to-end reliability and performance

Requirements:

You should know Linux/POSIX systems and system software fundamentals across the whole stack - from drivers through applications
You've shipped software at the junction of the cellular stack and the operating system. You've worked with modem control interface layers, such as Qualcomm's TelSDK or QMI, or the Android RIL
You know how to integrate cellular data into an operating system, through routing, firewalls, tethering, VPNs, and handoffs between WiFi and cellular
You know how to triage and debug end-to-end issues in a team, and can perform and analyze packet captures. You enjoy debugging difficult latency and connection issues that span framework, modem control, radio, kernel, and carrier
Most of our code is written in C, C++, and Java, so we expect you know at least one of these languages well
BS/MS/PhD in computer science or electrical engineering (or equivalent experience)
5+ years software development experience
Most importantly, you have a deep drive to make cellular work perfectly, on any carrier, modem, and in any signal conditions
Experience collaborating with radio and operating system vendors to debug issues
Experience with IMS-adjacent system integration (VoLTE/VoWiFi behaviors, emergency calling flows, QoS policy plumbing) focusing on OS services and reliability rather than deep protocol implementation
Familiarity with 4G/5G device behavior from an OS perspective (network selection policies, roaming behavior, dual-SIM/DSDS state management, recovery strategies)
Experience with eSIM/eUICC userland flows (activation/provisioning UX, profile management, secure storage, lifecycle and error recovery) and carrier-driven edge cases
Strong automation background for cellular reliability: lab harnesses, simulated networks, test plans aligned with certification suites, and telemetry-driven regression detection
Working knowledge of modem control-plane interfaces end-to-end: high-level vendor control APIs/SDK patterns and their underlying transports (e.g., QMI/MBIM/AT-style concepts), plus coordination with power/thermal and connectivity policy
The ability to collaborate with hardware engineers to debug antenna, power and operating system issues