Job Information

- Work Experience 10 - 12 Years

- Date Opened 08/25/2026

- Industry IT Services

- Job Type Full Time Employment

- City Hyderabad

- State/Province Telangana

- Country India

- Zip/Postal Code 500001

Job Summary

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.

Key Responsibilities

- 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.

- Improve product reliability, supportability, logging, diagnostics, and troubleshooting capabilities.

- Develop unit, integration, functional, and regression tests to prevent recurring issues.

- Participate in code reviews with focus on performance, compatibility, concurrency, security, and regression risks.

- Analyze recurring defects and field issues and drive long-term corrective actions.

- Support release readiness, maintenance releases,



defect reviews, and technical documentation.

- Clearly document root cause, resolution, testing, and customer/product impact.

Required Skills

- 6-10 years of software engineering experience, preferably in networking, security, distributed systems, or telecom products.

- Strong C and/or C++ programming experience.

- Robust Linux systems and debugging skills.

- Good understanding of IPv4/IPv6, TCP/UDP, routing, forwarding, tunneling, NAT, QoS, and packet flows.

- Hands-on experience with SD-WAN, routers, firewalls, network operating systems, or networking products.

- Experience with GDB, packet capture tools (Wireshark/tcpdump), logs, tracing, and performance analysis tools.

- Strong experience in troubleshooting production, intermittent, performance, scale, and environment-specific issues.

- Ability to trace issues across control plane, management plane, and datapath.

- Experience with Git/source control, code reviews, CI/CD, defect tracking, and regression testing.

- Strong analytical, problem-solving, communication, and ownership skills.

- Bachelor's or Master's degree in Computer Science, Computer Engineering, Electrical Engineering, or equivalent practical experience.

Good to Have

- Experience developing or sustaining SD-WAN appliances.

- Experience with networking/security products or carrier-grade systems.

- Knowledge of high availability, packet processing, performance optimization, and system-level troubleshooting.

- Experience working on maintained release branches and backporting production fixes

📌 Senior Sustaining Software Engineer (Hyderabad)
🏢 Veltris
📍 Hyderabad