Senior Software Engineer - C/C++ Networking & Security

123 Cisco Systems (India) Private Limited; Bengaluru; On-site; INR 2,000,000 - 3,000,000; Full time

Job summary

123 Cisco Systems (India) Private Limited in Bengaluru is seeking a seasoned professional with over 9 years of deep technical experience in networking and security. You will lead the design and development of secure networking solutions, ensuring resilience and scalability.

The ideal candidate possesses strong programming expertise in C/C++, alongside validated experience in system design, and has a deep understanding of networking concepts. Innovation and leadership will be key to driving secure networking initiatives within the team.

Qualifications

• 9+ years of deep technical experience across networking and security domains.
• Strong programming expertise in C/C++.
• Validated experience in system design and architecture for scalable, reliable systems.

Responsibilities

• Lead the design and development of secure networking solutions.
• Architect systems ensuring high scalability and security posture.
• Drive innovation in secure networking initiatives.

Skills

C/C++ programming

Networking concepts (TCP/IP, routing)

System design and architecture

Technical leadership

Communication skills

Tools

Embedded Linux

AI-assisted development tools

Job description

We, Security, Solutions and SDWAN Platform Infra, are a team passionate about 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 SDWAN Platform Infrastructure, crypto infrastructure, PKI systems, VPN technologies, SD‑WAN secure fabric, and post‑quantum security, powering millions of secure connections globally.

Responsibilities

• Lead the design and development of secure networking solutions across VPN (IPSec/IKEv2), PKI, cryptography, and SD‑WAN Platform Infra.
• Architect systems that ensure high scalability, resiliency, and security posture.
• Drive multi‑functional teamwork to deliver critically significant features.
• Improve performance, reliability, and operational excellence of distributed systems at scale.
• Influence technical direction and execution for high‑impact projects that improve scalability, resiliency, security posture, and customer experience.
• Drive innovation in next‑generation secure networking initiatives.
• Take complete ownership from conception to production release by demonstrating your ability to influence, facilitate, and work multi‑functionally across teams.
• Drive the adoption of AI‑assisted tools such as Codex to improve engineering productivity, automate development workflows, accelerate debugging, and enhance software quality across the team.
• Lead, mentor, and spread standard processes to other specialists on the team.

Minimum Qualifications

• 9+ 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).