System Architect / Principal Engineer - System NOS Management Layer

Job Summary

Leads the architecture and design of the NOS system management subsystem, covering CLI, NETCONF/YANG, and telemetry streaming.

Responsibilities

• Architect the system management layer - CLI, NETCONF/RESTCONF, gRPC, RESTful APIs, YANG modeling, telemetry, and remote access
• Design and implement CLI (hierarchical commands, execution engine), NETCONF (RFC 6241), and RESTCONF (RFC 8040)
• Design and implement gRPC/gNMI/gNOI services and YANG modeling (RFC 6020/7950) with OpenConfig/IETF models
• Design transactional configuration (commit/rollback, ACID datastores) and telemetry streaming (YANG-Push)
• Design reliability, security (AAA, TLS/SSL, RBAC), and APIs for configuration database integration
• Mentor engineers, lead architecture/API reviews, and drive cross-functional collaboration with protocol teams

Requirements

• Expert knowledge of NETCONF (RFC 6241, 5277), RESTCONF (RFC 8040), gNMI, and YANG modeling (RFC 6020/7950)
• Deep understanding of configuration management protocols, CLI subsystems, RESTful APIs, gRPC services, and telemetry streaming within NOS architecture

Nice to Have

• Experience building management subsystems within network operating systems
• YANG modeling experience with industry-standard models for device configuration
• Experience with network OS architectures and embedded systems development
• Experience building transactional configuration systems with rollback capabilities
• Multi-vendor network operating system development experience

Key Skills

• NETCONF
• Restconf
• gNMI
• YANG Modeling
• OpenConfig
• SSH
• Aaa/radius/tacacs+
• SQLite/Redis/etcd
• Python

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