Cellular DevOps Engineer

Role Overview

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.

Key Responsibilities

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)

Required Qualifications

● 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

Preferred Qualifications

● 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