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RU (Radio Unit) Interoperability Engineer –

Littleton/Denver, Colorado

My client is looking for seeking an Interoperability Engineer to be responsible for working directly with our customer, 3rd parties, and internal development, product, and services teams in the development of applicable test cases and processes to ensure industry standards (oRAN/3GPP) and customer requirements are met. Work with internal and external resources to execute design and validation of product with other vendor's products. Define and conduct detailed integration test plans with Fujitsu, partner, and customer resources. Hands-on works, customer, or partner’s test facilities. Develop integration Customer Acceptance Test Plans and execution of same.

Technical Experience:

• Lead Software, Hardware and Firmware integration for LTE and 5G NR RAN
• Extensive experience troubleshooting (system logs, OS logs, UE logs, network logs)
• End to End Open RAN Integration Knowledge is required
• Familiarity with over-the-air testing of LTE, LTE-A, 5G NR, CPE and UE
• Understanding of 3GPP standards, call flows, KPIs
• Deep knowledge of BBU (L1, L2 and L3) signaling protocols
• Ability to provide a detailed analysis of NE logs and subscriber traces to pinpoint and resolve issues,
including network troubleshooting of layer 2 and 3
• Fronthaul Interfaces: CPRI, eCPRI, RoE and IEEE 1914 and xRAN/oRAN (option 7.2 x) knowledge
• Wireless Standards/Organizations: 3GPP, IETF, ONAP, LTE, 5G NR and 802.11 protocols
• Thorough understanding of vRAN/ORAN architecture described in 3GPP standards (Rel 15 & 16)
• Provide ongoing technical deliverables, i.e. customer reports, RFx inputs, test cases, solution descriptions,
network diagrams and solution reports.
• Responsible for the technical assurance of the overall wireless solution as it goes through technical
scrutiny, performance evaluation, IOT, OSS Integration and FOA testing
• Development life-cycle process knowledge
• Experience with RAN products including cloud RAN, Software-defined networking, massive MIMO, 5G
macros and small cell deployments
• Knowledge of PHY and MAC Layer and Embedded software
• Antenna design, beamforming and interference mitigation for 5G/4G is a plus
• Core experience: EPC and 5G NG Cores
• Network integration of RAN into mobile operator’s experience is required
• Network Protocols: TCP/IP, UDP/IP and HTTP
• Software: Audit, Qualify and Evaluation of 3rd party software features and applications
• Testing: Design integration test plans for lab and field
• Test tools: Must have worked with an array of test equipment and tools
• Processes: familiar with engineering design process (design reviews, documentation, performance analysis
and defect analysis)
• Software Development Processes: familiar with Waterfall, Agile and Scrum (Iterative)
• Familiar with NFV, Software virtualization, Virtual machines, containers and VNF’s
• Overall system performance verification is required


• Required to be based in Littleton, CO
• Bachelor's degree in Electrical, Electronics, Computer Science or Telecommunications Engineering
(Masters or PHD will be favorable)
• MS Degree in EE or CS or equivalent
• Ten years of experience in Radio Access Network (RAN) systems or combined experience
• Minimum of 7 to 10 years of LTE, 5G and network architecture specifically focused on RAN systems
• Minimum 7 to 10 years with protocol analyzers, test tools such as XCAL, QXDM, Wireshark, Channel
Emulator, Spectrum Analyzers, Signal Generators is a plus.
• Direct hands-on product experience and knowledge working with Service Providers and Engineering for
5G, ORAN, vRAN, Cloud RAN and LTE solutions
• Strong knowledge in LTE Air Interface, PHY, MAC, RLC, RRC and PDCP layers is required
• Ability to provide knowledge transfer and knowledge sharing to internal teams and colleagues
• Ability to quickly grasp and adapt to new technologies and methodologies
• Ability to contribute to Whitepapers
• Document project status, conduct analytics and write final reports. Conduct integration status meetings
with partners, customers and internal teams as needed
• Strong organizational skills: disciplined w/ priorities, meets dates, handles multiple responsibilities
• Demonstrates leadership strength; self-motivated, accepts authority and responsibility
• Ability to work across boundaries and influence others outside the span of control
• Good communication skills; oral, written, non-verbal; internal and external facing w/ executive presence

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