Senior Sustaining Software Engineer

About the role

We are looking for a Senior SD-WAN Sustaining Engineer to develop, troubleshoot, and debug software for an SD-WAN appliance/platform. The role focuses primarily on production support, sustaining engineering, complex defect resolution, and product reliability rather than new feature development. The ideal candidate should have strong C/C++, Linux, networking, and SD-WAN experience, with excellent debugging and root-cause analysis skills.

What you'll do

• Investigate and resolve complex production and customer issues in SD-WAN software
• Perform root-cause analysis across datapath, routing, packet processing, session management, and system components
• Develop, test, and deliver high-quality fixes for supported releases
• Debug issues related to performance, scale, HA, configuration, networking, and hardware/OS interactions
• Work closely with Engineering, QA, Product Management, and Release Engineering teams

What you need

• 10–12 yrs of experience
• Git
• C++
• C
• Linux
• CI/CD
• Bug tracking
• M.Sc or B.Tech or B.E. or B.Sc or BCA or M.Tech or MCA

Good to have

• Telecom
• Regression testing
• Firewalls
• Root cause analysis