# Software Engineer - Cloud Native BNG Solution Testing, Scale & Performance, Python | 4-8 years at Cisco

Cisco is hiring a Software Engineer - Cloud Native BNG Solution Testing, Scale & Performance, Python | 4-8 years in Bengaluru, India. Level rates it Little AI ●○○○; you can [apply on Cisco](https://jobsbylevel.com/go/98c6950b-6fba-4faf-8ad4-a02733702c9e?utm_medium=ai-agent).

AI Level 1, AI centrality 10 out of 100. Bangalore, India.

## Details

- Company: [Cisco](https://jobsbylevel.com/companies/cisco)
- AI level: AI Level 1 (score 10 out of 100)
- Location: Bangalore, India
- Posted: October 29, 2026
- Apply: https://jobsbylevel.com/go/98c6950b-6fba-4faf-8ad4-a02733702c9e?utm_medium=ai-agent
- Free CV review for this job: https://jobsbylevel.com/cv-review?job=software-engineer-cloud-native-bng-solution-testing-scale-performance-python-4-8-years-at-cisco-521b2c

## Prepare for this job

The job page lists 5 likely interview questions for this offer, with a CV checklist: https://jobsbylevel.com/jobs/software-engineer-cloud-native-bng-solution-testing-scale-performance-python-4-8-years-at-cisco-521b2c

## Description

Meet the Team The Cisco cnBNG Solution Testing team validates carrier-grade broadband solutions running on IOS-XR routing platforms, including Cisco 8000, ASR 9000, and NCS 5500/5700. Our focus is ensuring that cnBNG solutions meet demanding service-provider requirements for functionality, scale, performance, resiliency, interoperability, and operational readiness. We validate the cnBNG solution end-to-end across Control Plane and User Plane functions, subscriber protocols, forwarding, high availability, and platform infrastructure. We operate at the intersection of software, hardware, networking, and customer deployments, with an automation-first approach and responsible adoption of AI-assisted engineering practices. Your Impact As a Software Engineer in the cnBNG Solution Testing team, you will own end-to-end solution, scale, performance, and resiliency validation of cnBNG deployments. You will design sophisticated service-provider network topologies, develop comprehensive test strategies, automate large-scale subscriber and traffic scenarios, and validate the system under realistic customer workloads. You will work extensively with traffic-generation platforms such as Keysight IXIA and Spirent, analyze system and forwarding performance, identify bottlenecks, and collaborate with development teams to drive defects to resolution. You will play a critical role in assessing product quality and providing evidence-based recommendations for release readiness. Design and implement end-to-end cnBNG solution testing across Control Plane, User Plane,subscriber management, forwarding, platform infrastructure, and external network elements. Own scale and performance qualification, including subscriber scale, session setup/teardown rates, throughput, latency, packet loss, convergence, CPU/memory utilization, and system behavior under sustained load. Develop realistic service-provider test topologies covering PPPoE, IPoE, DHCPv4/v6, PPP, RADIUS/CoA, L2TP, subscriber policies, accounting, QoS, and subscriber lifecycle scenarios. Build and validate large-scale cnBNG deployments with multiple Control Plane and User Plane nodes. Develop strong proficiency with Keysight IXIA and Spirent traffic generators, including subscriber emulation, protocol emulation, traffic generation, traffic analysis, performance benchmarking, and large-scale test execution. Create traffic profiles that model real-world broadband deployments, including mixed IPv4/IPv6 traffic, multiple packet sizes, bidirectional traffic, QoS classes, and subscriber service profiles. Validate CUPS / CP-UP separation, including session programming, state synchronization, state replay, reconciliation, Control Plane and User Plane failures, and recovery scenarios. Perform comprehensive high-availability and resiliency testing, including SRG geo/warm standby, process restart, node failures, link failures, ISSU, NSR/NSF, control-plane failures, and subscriber session continuity. Validate IOS-XR forwarding functionality including L2/L3 forwarding, FIB/adjacency, MPLS/L3VPN, H-QoS/policing, ACLs, mirroring, OAM/BFD, slowpath, and NPU forwarding behavior. Develop and maintain scalable Python-based test automation using pyATS/Genie or equivalent frameworks, integrating tests into CI/CD pipelines and regression suites. Build reusable automation libraries for topology setup, subscriber provisioning, traffic generation, fault injection, statistics collection, verification, and automated result analysis. Analyze performance trends and identify bottlenecks across software, forwarding hardware, NPU resources, CPU, memory, and control-plane interactions. Perform soak, longevity, stress, negative, boundary, and capacity testing to uncover issues that may only appear under sustained or extreme workloads. Validate subscriber QoS, accounting, lawful intercept, policy enforcement, and other service-provider features under functional and scale conditions. Validate CLI, YANG models, model-driven

The description is cut here. Read the full offer: https://jobsbylevel.com/jobs/software-engineer-cloud-native-bng-solution-testing-scale-performance-python-4-8-years-at-cisco-521b2c

Source: https://jobsbylevel.com/jobs/software-engineer-cloud-native-bng-solution-testing-scale-performance-python-4-8-years-at-cisco-521b2c

## Cite this page

Level. https://jobsbylevel.com/jobs/software-engineer-cloud-native-bng-solution-testing-scale-performance-python-4-8-years-at-cisco-521b2c.

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