Senior Software Engineer (C/C++, Networking, Routing, Security)

Meet the Team
We, Security, Solutions and SD-WAN Platform Infra, are a team focused on building next-generation secure connectivity solutions across VPN, cryptography, PKI, and SD-WAN. Across on-prem, cloud, and SSE/SIG environments, we deliver secure, scalable systems and apply AI intelligence to improve security posture, automate certificate lifecycle management, optimize performance, and enable predictive monitoring at scale. Our work spans SD-WAN Platform Infrastructure, crypto infrastructure, PKI systems, VPN technologies, SD-WAN secure fabric, and post-quantum security, powering millions of secure connections globally.
We are looking for a Software Engineer/Sr. Software Engineer to join team. You will belong to a team building secure networking solutions in a high-impact, fast-paced environment. Your work will help shape scalable, secure systems that enable site-to-site and remote access VPNs, certificate-driven trust models, cloud connectivity, and AI-enhanced secure SD-WAN architectures including initiatives in post-quantum security.
Your Impact
Design and build secure networking solutions across VPN (IPSec/IKEv2), PKI, and SD-WAN Platform Infrastructure
Collaborate with multi-functional engineering teams to build and deliver core security and connectivity features for large-scale deployments
Use AI-assisted tools such as Codex to improve engineering efficiency, automation, debugging, and software quality
Contribute to high-impact projects that improve scalability, resiliency, security posture, and customer experience
Share and broaden your knowledge by giving tech talks, and promoting engineering standard processes
Minimum Qualifications
8+ years of deep technical experience across networking and security domains, large-scale, production-grade systems
Strong programming expertise in C/C++
Deep understanding of networking concepts (TCP/IP, routing, distributed systems)
Validated experience in system design and architecture for scalable, reliable systems
Track record of leading critical projects end-to-end
Experience in embedded Linux software development
Ability to influence technical direction across teams
Good communication skills with the ability to simplify complex technical concepts
Preferred Qualifications
Experience with IPSec VPN technologies
Embedded Linux system development, Yocto-based build system expertise, and cloud platform integration skills.
Understanding of PKI systems and certificate lifecycle management
Background in network security, SD-WAN, or secure connectivity
Exposure to cryptographic systems and protocols
Experience demonstrating AI-assisted development tools to improve team productivity
Exposure to post-quantum cryptography (PQC) or cryptographic agility
Experience chipping in to networking/security standards (RFCs)
Why Cisco?
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.
Disclaimer
About
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Work arrangement
No