Cellular-DevOps Engineer

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. You will be responsible for building, operating, and automating the infrastructure that enables 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 role that requires both hardware lab familiarity and strong software/automation skills., Cellular & 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 signal path issues including cabling, attenuation, and antenna configuration
• 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 callbox vendors, and maintain reference device baselines.

DevOps & Automation (40%)

• CI/CD Pipeline Integration : Configure and maintain automated test lanes - both blocking and non-blocking - for cellular test suites within continuous integration frameworks
• Infrastructure-as-Code : Manage network ACLs, network configuration pushes, proxy filters, and DNS automation pipelines
• Service Development (Python) : Build and maintain automated services such as 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 and maintain device inventory systems - 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 libraries for device-side modem management (mode switching, airplane mode, cellular measurements)
• Lab Network Tooling : Build and maintain lab network management features (PoE control, port management, VLAN allocation), 1. Month 1-2, Onboard to the cellular lab environment; gain hands-on familiarity with the callbox infrastructure, wearable devices, and the existing test suite

2. Month 2-3 : Own and extend one automation pipeline (e.g., IP management or device inventory); deliver at least one improvement to reliability or throughput
3. Month 3-4 : Author or extend a cellular E2E test covering a new band/RAT/scenario; integrate it into the CI pipeline as an automated gate
4. Month 4-6 : Drive an infrastructure improvement end-to-end - e.g., automated modem provisioning, callbox health monitoring, or test fleet scaling.

• 3+ 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; ability to write production services and test automation
• Linux systems administration : Comfortable with shell scripting, systemd services, networking (VLANs, static routing, iptables/nftables), and embedded device interaction (adb, fastboot, serial)
• Infrastructure automation : Experience with at least two of: CI/CD pipelines, Infrastructure-as-Code, configuration management, database administration, or monitoring systems
• Debugging mindset : Ability to troubleshoot across the full stack - from RF signal levels and modem firmware to service RPCs and database queries., * Experience with Amarisoft or similar small-cell/callbox platforms (Keysight, R&S)
• Familiarity with Qualcomm modem tooling (QXDM, QMI, DIAG, NV item provisioning, EFS management)
• Exposure to wearable/IoT device development or 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.

What We're Looking For' Beyond technical skills, we value the following traits in candidates for this role:

• Quick Learner : You pick up new tools, protocols, and systems fast - whether it's a new modem chipset, a CI framework you haven't used before, or an unfamiliar RF measurement technique. You don't wait to be taught; you dig in and figure it out.
• Self-Starter : You identify problems and fix them without waiting for someone to assign the work. When you see a gap in automation or a flaky test, you take ownership.
• Comfortable with Ambiguity : This role spans hardware, software, and RF - you won't always have a playbook. You're energized (not paralyzed) by open-ended problems.
• Collaborative : You work across disciplines (firmware, RF, DevOps, test engineering) and communicate clearly with people who have different technical backgrounds. You share knowledge freely.
• Bias Toward Action : You ship incremental improvements rather than waiting for the perfect solution. You're comfortable iterating in production lab environments where speed matters.
• Detail-Oriented Under Pressure : RF and modem work demand precision - a wrong attenuation value or misconfigured NV item can waste hours. You double-check your work and build safeguards into your automation.