Cellular DevOps Engineer

Job Title: Cellular DevOps EngineerLocation: Menlo Park, CA (Onsite – 5 Days/Week)We are seeking a Cellular DevOps Engineer to join our Wearables Cellular team within Engineering Labs. This role sits at the intersection of public and private 5G/LTE cellular network engineering and DevOps automation, supporting the development and testing of next-generation wearable devices with cellular connectivity.In this role, you will build, operate, and automate the infrastructure enabling end-to-end cellular testing—from RF signal path optimization and modem provisioning to CI/CD pipeline integration and automated IP management services. This is a hands-on engineering position requiring both hardware lab familiarity and strong software/automation skills.Key ResponsibilitiesCellular & RF Engineering (40%)Private 5G/LTE Network Operations: Configure and maintain small-cell/callbox infrastructure supporting NR SA, LTE, and NR-RedCap across multiple frequency bands (n2, n5, n25, n66, B2, B5, B66).RF Signal Path Management: Optimize RSRP/RSRQ/SINR measurements in shielded test environments; troubleshoot cabling, attenuation, and antenna configurations.Device Modem Provisioning: Manage modem calibration file provisioning, EFS (Embedded File System) operations, QMI/DIAG interfaces, and modem mode configuration.Cellular E2E Test Execution: Run and validate NR attach/detach cycles, data path verification (ping/DNS/iperf3), GNSS integration, and multi-RAT connectivity scenarios.Hardware Lab Operations: Stage and pair devices in shield boxes, manage rack equipment mapping, coordinate with vendor tools, and maintain reference device baselines.DevOps & Automation (40%)CI/CD Pipeline Integration: Configure and maintain automated blocking and non-blocking test lanes for cellular test suites.Infrastructure-as-Code: Manage network ACLs, configuration pushes, proxy filters, and DNS automation pipelines.Service Development (Python): Build and maintain automated services like IP management pipelines (static routing, DNS verification, asset tagging, batch processing).Database & State Management: Administer MySQL databases, schema migrations, configuration management systems, and service state stores.Monitoring & Observability: Instrument services with time-series metrics, manage alerting thresholds, respond to health alerts, and track SLA compliance.Inventory & Asset Management: Extend CLI tools, reservation workflows, and device registration pipelines.Test Framework & Tooling (20%)E2E Test Development: Author config-driven cellular E2E tests (JavaScript/Jest) covering LTE, NR SA, NR-RedCap, and attach/detach scenarios.Callbox Integration Tooling: Develop and maintain Python/Thrift bridges for callbox queries and control RPCs.Modem Utility Libraries: Contribute to shared device-side modem management libraries (mode switching, airplane mode, cellular measurements).Lab Network Tooling: Build and maintain lab network management features (PoE control, port management, VLAN allocation).Required Qualifications3+ years of experience in cellular/wireless engineering, DevOps, or a combined infrastructure role.Private Cellular Network Experience: Hands-on with 4G LTE and/or 5G NR—including cell planning, RF measurements (RSRP, RSRQ, SINR), and UE attach/registration flows.Programming Proficiency: Python (primary) with working knowledge of JavaScript; capability to write production services and test automation.Linux Systems Administration: Shell scripting, systemd services, networking (VLANs, static routing, iptables/nftables), and embedded device interaction (adb, fastboot, serial).Infrastructure Automation: Experience with at least two: CI/CD pipelines, IaC, configuration management, database administration, or monitoring systems.Full-Stack Debugging Mindset: Ability to troubleshoot from RF signal levels and modem firmware up to service RPCs and database queries.Preferred QualificationsExperience with Amarisoft, Keysight, Rohde & Schwarz, or similar small-cell/callbox platforms.Familiarity with Qualcomm modem tooling (QXDM, QMI, DIAG, NV item provisioning, EFS management).Exposure to wearable or IoT device development and testing.Experience with Thrift/gRPC service development and service mesh architectures.Knowledge of MCTP/NCSI or other baseboard management protocols.Background in test automation frameworks (Jest, pytest, or similar).Familiarity with network security tooling (ACL generation, firewall policy management).Experience operating shielded/anechoic test environments.