Sr. Technical lead Packet Core QA

Rakuten Kobo Inc.; Bengaluru; On-site; INR 1,200,000 - 2,400,000; Full time

Benefits offered by this job

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Job summary

Rakuten Symphony is seeking an experienced telecom test engineer in Bengaluru to design, build, and execute test scenarios for 4G/5G core networks. You will work with scripting and testing tools, interpret logs for root-cause analysis, and contribute to improving test strategies and tooling.

The role requires strong knowledge of core network protocols and hands-on testing experience in NFVi environments. With a focus on scalable, cloud-native telecom platforms, the team values meticulous

Qualifications

• Minimum 4–10 years of experience in telecom/test design and validation.
• Strong exposure to 4G/5G core networks and related protocols.
• Experience with end-to-end call flow testing and debugging.
• Familiarity with modern test tools, scripting, and NFV/VNF concepts.

Responsibilities

• Create test scripts using available test tools and develop novel scenarios.
• Build test setups per the feature's test strategy and environment.
• Execute test cases and validate test status against expectations.
• Analyze system and test logs to debug and identify root causes.
• Suggest improvements for testing approaches and tool usage.

Skills

4G/5G knowledge

S1AP/NGAP protocols

Packet Core testing

Kubernetes

Helm/JSON/YAML

NFVi Lifecycle

Spirent Landslide

L2/L3 Networking

Calico service mesh

Education

Bachelor's/Master's in Telecommunication Engineering or CS

Tools

Spirent Landslide

Kubernetes

Helm

JSON/YAML

Calico

Job description

KEY RESPONSIBILITIES

Creating test scripts using available test tools. This will involve getting familiarized with the test tools and figuring out innovative ways of re-creating practically possible scenarios. Ability to build test setups as per the requirements of the test case and environment. Executing test cases and validating the test status based on the expectations for the test case. Ability to fully understand system logs, test tool logs and use this understanding for debugging issues and identifying accurate root causes for the problems seen on the system under test or in the network Using the test expertise and identifying overall improvements and enhancements

MINIMUM REQUIREMENTS (Knowledge, Skills, Abilities)

To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. Minimum 4 to 10 years of experience Good exposure of Packet Core Nodes which should primarily include SGSN, GGSN, MME, PCRF , ePDG , vEPC (vMME, vSAE-GW) Good exposure with AMF,SMF,UPF, NRF, NSSF, UDM, UDR, UDSF, PCF etc. In-depth knowledge of core network 4G/5G message flows based on 3GPP based protocols like S1AP,NGAP, GTP, Http2, NAS, PFCP, Diameter. Thorough knowledge and hands on experience in (4G, 5G NSA/SA ), call flow, control plane and data plane functions. Hands on Experience on testing E2E call flows with respect to Packet Core. Expertise in product /capacity testing using simulators/scripting /open source tools Ability to create/build test setups as per the test strategy of the feature. Executing test cases and validating the test status based on the expectations for the test case. Ability to fully understand system logs, test tool logs and use this understanding for debugging issues and identifying accurate root causes for the problems seen on the system under test or in the network. Expertise with core network simulated tools like Spirent Landslide. Good understanding of NFVi Architecture and VNF Life Cycle Management. Experience in K8S is a plus. Working knowledge with Helm, json, yaml etc. L2/L3 network and k8s Networking expertise CNIs like Calico and service mesh.

QUALIFICATION REQUIREMENTS

Bachelor's/Master's degree in Telecommunication Engineering, Computer Science, Computer Information System or any equivalent degree. Ability to communicate written and verbally in English is a must. German, Japanese is a plus.

Rakuten Symphony is reimagining telecom, changing supply chain norms and disrupting outmoded thinking that threatens the industry's pursuit of rapid innovation and growth. Based on proven modern infrastructure practices, its open interface platforms make it possible to launch and operate advanced mobile services in a fraction of the time and cost of conventional approaches, with no compromise to network quality or security. Rakuten Symphony has operations in Japan, the United States, Singapore, India, South Korea, Europe, and the Middle East Africa region. For more information, visit: https://symphony.rakuten.com Building on the technology Rakuten used to launch Japan's newest mobile network, we are taking our mobile offering global. To support our ambitions to provide an innovative cloud-native telco platform for our customers, Rakuten Symphony is looking to recruit and develop top talent from around the globe. We are looking for individuals to join our team across all functional areas of our business - from sales to engineering, support functions to product development. Let's build the future of mobile telecommunications together!