Cellular DevOps Engineer

TekWissen•Menlo Park, CA

3d•Onsite

About The Position

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.

Requirements

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

Nice To Haves

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

Responsibilities

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)
Optimize RSRP/RSRQ/SINR measurements in shielded test environments; troubleshoot signal path issues including cabling, attenuation, and antenna configuration
Manage modem calibration file provisioning, EFS (Embedded File System) operations, QMI/DIAG interfaces, and modem mode configuration
Run and validate NR attach/detach cycles, data path verification (ping/DNS/iperf3), GNSS integration, and multi-RAT connectivity scenarios
Stage and pair devices in shield boxes, manage rack equipment mapping, coordinate with callbox vendors, and maintain reference device baselines
Configure and maintain automated test lanes - both blocking and non-blocking - for cellular test suites within continuous integration frameworks
Manage network ACLs, network configuration pushes, proxy filters, and DNS automation pipelines
Build and maintain automated services such as IP management pipelines (static routing, DNS verification, asset tagging, batch processing)
Administer MySQL databases, schema migrations, configuration management systems, and service state stores
Instrument services with time-series metrics, manage alerting thresholds, respond to health alerts, and track SLA compliance
Extend and maintain device inventory systems - CLI tools, reservation workflows, and device registration pipelines
Author config-driven cellular E2E tests (JavaScript/Jest) covering LTE, NR SA, NR-RedCap, and attach/detach scenarios
Develop and maintain Python/Thrift bridges for callbox queries and control RPCs
Contribute to shared libraries for device-side modem management (mode switching, airplane mode, cellular measurements)
Build and maintain lab network management features (PoE control, port management, VLAN allocation)