Senior Software Integration Engineer – ONU Interoperability

5 days ago

Bengaluru, Karnataka, India Harmonic Full time

Description
Senior Software Integration Engineer – ONU Interoperability
Harmonic is the worldwide leader in virtualized broadband solutions. We revolutionized broadband networking via the industry's first virtualized broadband solution, enabling broadband operators to more flexibly deploy gigabit internet service to consumers' homes and mobile devices. Learn more at

Role Description
We are seeking a Senior Software Integration Engineer – ONU Interoperability to join our Broadband R&D organization in Bangalore, India.

This position is part of a strategic new team responsible for ensuring the interoperability, stability, and compliance of Optical Network Units (ONUs) with Harmonic's virtualized OLT (vOLT) solutions.

You will serve as a technical bridge between QA and software development, combining deep PON expertise with hands-on coding skills to diagnose complex issues, implement fixes, and ensure seamless ONU integration across customer deployments.

Location
Hybrid role – working at 3-4 days a week from our office in Bangalore.

What You Will Be Doing

  • Execute and maintain the ONU IoP acceptance test suite used to qualify ONUs for customer deployments
  • Diagnose and resolve complex interoperability issues between ONUs and Harmonic's vOLT through deep technical analysis of logs, traces, and source code
  • Read, debug, and modify C++ and Python code to identify root causes and implement fixes for straightforward issues
  • Analyze PON specifications (ITU-T G.984, G.987, G.9807, G.988) to assess compliance and guide resolution of protocol deviations
  • Lead technical discussions with ONU vendors to isolate and resolve interoperability gaps, using captured traces and specification analysis
  • Collaborate with R&D scrum teams on complex issues, providing detailed technical findings and reproduction scenarios
  • Validate vendor fixes through regression and acceptance testing
  • Enhance automation tools and debugging capabilities to improve test coverage and analysis efficiency

What You Will Need To Succeed

  • BE/B.Tech or higher degree in CS/EC/IT or equivalent experience
  • 5+ years of hands-on experience in networking systems development, integration, or R&D
  • Strong C++ and Python programming skills with the ability to read, debug, and modify production code
  • Proficiency with Linux environments and network debugging tools (Wireshark, tcpdump)
  • Solid knowledge of networking protocols (Ethernet, VLAN, IPv4/6, DHCP, multicast)
  • Experience with traffic generation tools (IXIA, Spirent)
  • Strong understanding of PON architecture, protocols, and specifications, including OLT/ONU interoperability, OMCI, and PLOAM messaging - advantage
  • Hands-on experience with containerized environments (Docker, Kubernetes) – advantage
  • Strong analytical and problem-solving skills with the ability to perform deep root-cause analysis
  • Excellent collaboration and communication skills in English

Diversity, Equality, and Inclusion at Harmonic
At Harmonic, we believe that building and nurturing a global team with diverse backgrounds and voices is critical to our success. Together, we achieve excellence through creativity and innovation, build relationships based on integrity and mutual respect, and deliver the highest quality in every aspect of our business for the benefit of our employees, business partners and shareholders.

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