Senior Software Engineer, NOS Platform Engineer

Cornelis Networks, Inc.•Austin, TX

8d•Remote

About The Position

Cornelis Networks delivers the world’s highest performance scale-out networking solutions for AI and HPC datacenters. Our differentiated architecture seamlessly integrates hardware, software and system level technologies to maximize the efficiency of GPU, CPU and accelerator-based compute clusters at any scale. Our solutions drive breakthroughs in AI & HPC workloads, empowering our customers to push the boundaries of innovation. Backed by top-tier venture capital and strategic investors, we are committed to innovation, performance and scalability - solving the world’s most demanding computational challenges with our next-generation networking solutions. We are a fast-growing, forward-thinking team of architects, engineers, and business professionals with a proven track record of building successful products and companies. As a global organization, our team spans multiple U.S. states and six countries, and we continue to expand with exceptional talent in onsite, hybrid, and fully remote roles. Join our Network Operating System team to build and optimize NOS platforms supporting both SONiC and FBOSS for Cornelis Networks' next-generation switch ASIC platforms. This role combines deep platform integration work—including hardware bring-up, BSP development, and ASIC driver integration—with NOS control plane and data plane development. You'll work collaboratively with hardware, firmware, and SAI/SDK teams to deliver high-performance, production-ready network operating systems. You'll work in an AI-first development environment, leveraging cutting-edge tooling to maximize productivity and impact.

Requirements

BS in Computer Science, Computer Engineering, or related field
7-10 years of software engineering experience
Strong proficiency in C/C++ and Python
Linux systems programming and networking stack experience
Switch/networking hardware experience OR network operating system development experience
Strong debugging and problem-solving skills for complex hardware/software integration issues
Excellent communication and collaboration skills
Commitment to AI-first development practices and continuous learning of emerging AI tooling

Nice To Haves

SONiC platform development experience (strongly preferred)
FBOSS experience (highly desirable)
Linux kernel and driver development experience
Network protocol implementation experience (L2/L3 switching, routing, BGP, OSPF)
Switch ASIC/SDK integration experience
Experience with platform services and daemons (SONiC platform daemons, FBOSS agents, or similar)
Hardware/ASIC architecture understanding
Performance optimization and profiling experience (perf, gprof, valgrind, etc.)
Open-source contribution history (SONiC, FBOSS, or other networking projects)
Technical leadership and mentoring experience
Experience with AI-assisted development tools (GitHub Copilot, Cursor, or similar)
Familiarity with test automation frameworks and CI/CD systems
Experience with platform bring-up, BSP development, or embedded Linux systems

Responsibilities

NOS Platform Integration: Lead platform porting and BSP development for switch ASIC platforms, including hardware bring-up, driver integration, and platform-specific adaptations
Hardware Integration: Integrate and validate ASIC drivers, optics/transceiver management, thermal/power management, and BMC/baseboard interfaces
Multi-NOS Support: Design platform abstractions and implementations to support both SONiC and FBOSS architectures
NOS Development: Design and implement control plane and data plane components for SONiC and FBOSS, ensuring seamless operation with underlying hardware
Platform Services: Develop and maintain platform services and daemons for hardware monitoring, configuration, and management
SAI/SDK Integration: Collaborate with SAI/SDK team to integrate switch abstraction layer with SONiC and FBOSS architectures
Test Infrastructure: Build and maintain test frameworks, automation, and CI/CD pipelines for NOS platform validation; write comprehensive unit and integration tests
Performance Optimization: Profile and optimize NOS performance for latency, throughput, and resource utilization
Open Source Collaboration: Engage with the SONiC and FBOSS open-source communities, contribute improvements where applicable, and stay current with upstream developments
Technical Collaboration: Work closely with hardware, firmware, and systems teams to resolve integration issues and define platform requirements
AI-First Development: Leverage AI coding assistants and emerging tooling to accelerate development velocity and code quality