Software Engineer - Network Security | SD-WAN Platform (C/C++)

Software Engineer - Network Security | SD-WAN Platform (C/C++) Location: Bangalore, India 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 4–8 years of experience building production-grade software systems 4+ Years of Strong programming skills in C/C++ Proven understanding of networking concepts (TCP/IP, routing, distributed systems) 4+ years of experience designing/enhancing core networking or security or SDWAN features Experience crafting and delivering scalable and reliable systems Experience in embedded Linux software development Ability to own features end-to-end from design to deployment Strong problem-solving, communication, and collaboration skills Preferred Qualifications Experience with IPSec VPN technologies Experience in embedded Linux software development workflows, including compilation and integration within Yocto-based or similar Linux platforms. Understanding of PKI systems and certificate lifecycle management Background in network security Exposure to cryptographic systems or secure communication protocols Experience using AI-assisted development tools (e.g., Copilot, Codex) to improve engineering productivity 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.