SW Development Engineer - ONU Interoperability

About Harmonic:

Harmonic is the worldwide leader in virtualized broadband solutions. We revolutionized broadband networking via the industry’s first virtualized broadband solution, enabling cable operators to more flexibly deploy gigabit internet service to consumers’ homes and mobile devices.

Learn more at www.harmonicinc.com.

What you will be doing:

• Develop and debug software using C++ and/or Python to support ONU interoperability and integration.
• Diagnose and resolve complex interoperability issues between ONUs and Harmonic's vOLT solutions through detailed 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, including ITU-T G.984, G.987, G.9807, and G.988, to assess compliance and investigate protocol deviations.
• Collaborate closely with R&D scrum teams to communicate technical findings, develop reproduction scenarios, and drive issues toward resolution.
• Execute and maintain the ONU interoperability acceptance test suite used to qualify ONUs for customer deployments.
• Validate vendor fixes through regression and acceptance testing.
• Work closely with QA and software development teams to improve the stability and interoperability of ONU integrations.

What you should have:

• BE/B.Tech or higher degree in Computer Science, Electronics & Communication, Information Technology, or an equivalent technical discipline.
• 5+ years of hands-on experience in networking systems development, software integration, or R&D.
• Strong programming skills in C++ and Python, with the ability to read, debug, and modify production code.
• Strong understanding of Linux environments and experience using network debugging tools such as Wireshark and tcpdump.
• Solid understanding of networking protocols, including Ethernet, VLAN, IPv4/IPv6, DHCP, and Multicast.
• Experience with traffic generation tools such as IXIA or Spirent.
• Strong analytical and problem-solving skills, with the ability to perform detailed root-cause analysis of complex system issues.
• Strong collaboration and communication skills, with the ability to work effectively across multiple technical teams.
• Excellent written and spoken English.

Nice to have:

• Strong understanding of PON architecture, protocols, and specifications, including OLT/ONU interoperability, OMCI, and PLOAM messaging.
• Hands-on experience with containerized environments such as Docker and Kubernetes.
• Experience working with virtualized OLT or ONU technologies.
• Experience in customer-facing technical or integration roles.

Why join Harmonic?

• Work on cutting-edge virtualized broadband technologies with direct customer impact.
• Collaborate with engineers across India, France, Ukraine, Israel, and the U.S.
• Work on challenging problems at the intersection of software, networking, and broadband technologies.
• Gain continuous learning opportunities in PON systems, virtualization, and cloud-native networking.
• Be part of a dynamic, innovation-driven R&D environment.

Diversity, Equality, and Inclusion at Harmonic Inc.

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.