Senior Software Engineer

About the Role : We are seeking a Senior Software Engineer with advanced networking expertise, ideally at CCIE/JNCIE-equivalent level, to design, implement, and optimize SD-WAN solutions. This role requires deep technical proficiency in real-time, large-scale networking, combined with hands-on experience in network automation, testing, and troubleshooting.The ideal candidate will possess strong experience in Cisco SD-WAN (vManage, vEdge, cEdge) environments, comprehensive understanding of IPv4/IPv6 routing, and solid scripting skills in Python for automation. This role will involve both engineering and operational responsibilities, including network design, configuration, debugging, and automation of SD-WAN services.Key Responsibilities : - Design, configure, and implement Cisco SD-WAN (Viptela) solutions, including vManage, vBond, and vSmart components.- Perform end-to-end network configuration for both IPv4 and IPv6 using CLI and vManage GUI.- Architect redundant, scalable, and secure WAN topologies for enterprise-grade customers.- Evaluate and recommend SD-WAN policies, traffic engineering strategies, and security frameworks.- Perform advanced troubleshooting of SD-WAN network incidents, including control plane, data plane, and management plane issues.- Debug complex real-time networking environments using diagnostic tools and packet captures (e.g., Wireshark, tcpdump).- Analyze network performance, identify bottlenecks, and recommend optimizations.- Work on incident management and RCA (Root Cause Analysis) for critical issues.- Support post-deployment maintenance and operations, ensuring high network availability.- Configure and troubleshoot major routing protocols : OSPF, EIGRP, BGP (for IPv4 and IPv6).- Implement and manage VPNs (IPSec, TLS, DTLS) and tunneling protocols (GRE, DMVPN).- Configure and support network services and protocols such as : TCP/IP, VRRP, MPLS, BFD, DHCP, QoS, NAT, ZBFW, and Multicast.- Manage and maintain network devices across platforms like ISR/ASR routers, vEdge, cEdge, and Catalyst switches.- Develop automation scripts and network configuration tools using Python (and optionally Ansible or REST APIs).- Integrate automated testing workflows for SD-WAN using Python, Postman, or custom-built frameworks.- Participate in manual and automated SD-WAN testing, ensuring high availability, performance, and compliance.- Design and maintain network simulation/test environments to validate configurations and feature enhancements.- Deploy and manage virtualized network environments using VMware, KVM, or Cisco Cloud platforms.- Implement and troubleshoot security technologies, including firewall policies, IPSec encryption, and ZBFW configurations.- Support VPN, SSL/TLS configurations, and ensure compliance with organizational security standards.- Maintain knowledge of Linux-based systems for network services, log analysis, and scripting automation.- Collaborate with cross-functional teams including QA, DevOps, and Product Engineering for SD-WAN releases and updates.- Participate in design reviews, network audits, and performance tuning sessions.- Provide mentorship to junior network engineers and act as a technical escalation point for complex issues.- Document architecture designs, configuration templates, and troubleshooting runbooks.Required Technical Skills : - Deep understanding of network protocols : OSPF, EIGRP, BGP, MPLS, VRRP, BFD, NAT, GRE, DHCP, QoS, and IPSEC.- Experience with Cisco SD-WAN platforms vEdge, cEdge, vSmart, vManage, ISR/ASR routers, and Catalyst family.- Hands-on experience with IPv4 and IPv6 dual-stack configurations.- Solid knowledge of VPN technologies (IPSec, TLS, DTLS) and ZBFW (Zone-Based Firewall).- Proficiency in Python scripting for automation, data analysis, and network testing.- Experience with network automation tools (REST APIs, Ansible, NETCONF/YANG preferred).- Familiarity with CI/CD concepts for network testing and deployment automation.- Strong knowledge of Linux OS for troubleshooting and automation.- Familiarity with virtualization environments (VMware, KVM, VirtualBox).- Tools : Wireshark, tcpdump, Postman, Git, Jenkins (or similar).- Experience in manual and automated SD-WAN testing (functional, performance, and integration).- Ability to perform deep-dive packet-level debugging and protocol tracing. (ref:hirist.tech)