Software Engineer - C, C++ and Routing Protocols - 8 to 10 years

The DSE Platform Independent Common (PI-Common) group develops high-performance, platform-independent system software that runs across Cisco’s flagship routers and switches. We design and deliver core routing protocols and infrastructure components that power Cisco’s Mass Scale Infrastructure, Cloud Networking, and Network Experience portfolios.

Our team owns the architecture, implementation, and lifecycle of BGP, a key control plane protocol that enable critical solutions for the Data Center and provide them a competitive edge.

This Data Center group is in the forefront of developing products that power the largest networks in the world. The networking industry is going through a massive transformation to build the next generation infrastructure to meet the needs of AI/ML workloads and continuously increasing internet users and application. We are uniquely positioned to capture that market transition.

Your Impact

As a Software Engineer in PI-Common, you will design, build, and sustain critical routing protocol and infrastructure components used across Cisco platforms. Your work will directly impact production networks operating at massive scale across enterprise, service provider, cloud, and AI infrastructure environments. Key responsibilities include:

• Designing and implementing enhancements to BGP Routing protocol.

  
  
  

• Building systems that scale efficiently, are secure by design, and provide strong programmability, observability and debuggability in production.

  
  
  

• Debugging complex system-level issues in large-scale, multi-threaded environments, including high-priority customer escalations.

  
  
  

• Owning issues end-to-end — from root cause analysis through fix development, validation, and deployment.

  
  
  

• Representing Cisco in IETF forums and technical discussions; contributing to protocol evolution and influencing standards where appropriate.

  
  
  

• Collaborating closely with platform, hardware, and test teams to validate performance, scale limits, and system behaviour.

  
  
  

• Mentoring junior engineers and contributing to a culture of technical rigor and ownership.

  
  
  

• Contributing to innovation initiatives, including Cisco’s Patent Program.

  
  
  

Minimum Qualifications (Required)

Master’s degree with 4+ years or Bachelor’s degree with 6+ years of relevant experience.

“Strong experience developing software in multi-threaded environments with excellent problem-solving skills.

• Practical experience with Data Structures, Operating Systems and Concepts of Data Networking

  
  
  

• Programming experience (C, C++), script languages (Perl, Python)

  
  
  

• Familiarity with Unix/Linux

  
  
  

• Exposure to development of software for large/complex network devices including routing & switching systems.

  
  
  

• Understanding of networking fundamentals and protocols (ex: TCP/IP, Ethernet)

  
  
  

Preferred Qualifications (Good to have)

• Hands-on experience in routing protocols and/or routing infrastructure.

  
  
  

• Experience in manageability frameworks such as YANG/SNMP/XML.

  
  
  

• Good understanding of concepts in operating system, Inter process communication, high availability etc

  
  
  

• Experience in any Cisco OS – XR, XE or NXOS would be a plus

  
  
  

• Creative problem-solving skills and excellent troubleshooting/debugging skills

  
  
  

• Excellent teamwork and people skills

  
  
  

At Cisco, we’re revolutionizing how data and infrastructure connect and protect organizations in the AI era – and beyond. We’ve been innovating fearlessly for 40 years to create solutions that power how humans and technology work together across the physical and digital worlds. These solutions provide customers with unparalleled security, visibility, and insights across the entire digital footprint.

Fueled by the depth and breadth of our technology, we experiment and create meaningful solutions. Add to that our worldwide network of doers and experts, and you’ll see that the opportunities to grow and build are limitless. We work as a team, collaborating with empathy to make really big things happen on a global scale. Because our solutions are everywhere, our impact is everywhere. 

We are Cisco, and our power starts with you.