# Software Engineer in the cnBNG Solution Testing team

**Company**: Cisco
**Location**: Bangalore
**Experience**: senior
**Job type**: full-time
**Category**: Engineering
**Industry**: Technology

**Apply**: https://cisco.wd5.myworkdayjobs.com/en-US/Cisco_Careers/job/Bangalore-India/Software-Engineer----Cloud-Native-BNG-Solution-Testing--Scale---Performance--Python---8-12-year_2025251-1?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply
**Canonical**: https://yubhub.co/jobs/job_5e05e7ba-56d

## Description

The Cisco cnBNG Solution Testing team validates carrier-grade broadband solutions running on IOS-XR routing platforms. As a Software Engineer in this 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.

Key responsibilities:

- 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.

- Create traffic profiles that model real-world broadband deployments.

- 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.

- Validate IOS-XR forwarding functionality.

- Develop and maintain scalable Python-based test automation using pyATS/Genie or equivalent frameworks.

- Analyze performance trends and identify bottlenecks.

- Perform soak, longevity, stress, negative, boundary, and capacity testing.

- Validate subscriber QoS, accounting, lawful intercept, policy enforcement, and other service-provider features.

- Debug sophisticated solution-level issues.

- Partner closely with development, platform, system architecture, and customer-facing engineering teams.

- Define measurable test exit criteria and provide data-driven release-quality and readiness recommendations.

Minimum qualifications:

- Bachelor's or master's degree in Computer Science, Electrical/Computer Engineering, Telecommunications, or a related field.

- Strong experience in system, solution, scale, performance, and resiliency testing of networking products or carrier-grade networking solutions.

- Strong understanding of test methodologies.

- Hands-on expertise with Keysight IXIA and/or Spirent traffic-generation platforms.

- Strong Python programming and experience developing scalable test automation.

- Experience integrating automated test suites into CI/CD and continuous regression pipelines.

- Strong IP networking fundamentals.

- Knowledge of broadband/subscriber technologies and protocols.

- Experience configuring, validating, and solving IOS-XR or another carrier-grade network operating system.

- Ability to design and implement large-scale network topologies.

- Strong understanding of high availability, duplication, subscriber-state management, and fault-recovery mechanisms.

- Strong Linux skills and experience with Git, debugging tools, packet collections, logs, telemetry, and defect-management systems.

- Strong solving and analytical skills.

- AI-assisted engineering is a must.

## Skills

### Required
- Python
- Keysight IXIA
- Spirent
- pyATS/Genie
- IOS-XR
- IP networking
- broadband/subscriber technologies
- Linux
- Git

### Nice to have
- cnBNG
- BNG
- broadband subscriber solutions
- CUPS / Control Plane–User Plane separation
- IXIA BreakingPoint/IxNetwork
- Spirent Test Center
- Cisco 8000
- ASR 9000
- NCS 5500/5700
- Silicon One
- SRv6/Segment Routing
- MPLS
- EVPN/VPLS
- TE/GRE tunnels
- BFD
- BGP Flowspec
- ACLs
- YANG
- gRPC
- NETCONF
- gNMI
- OpenConfig
- telemetry

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Source: [Apply at cisco.wd5.myworkdayjobs.com](https://cisco.wd5.myworkdayjobs.com/en-US/Cisco_Careers/job/Bangalore-India/Software-Engineer----Cloud-Native-BNG-Solution-Testing--Scale---Performance--Python---8-12-year_2025251-1?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)