Senior Software Engineer, NOS Platform Engineer

At Cornelis we’re building the future of AI and HPC networking with an AI-first approach to silicon and software development. We’re seeking engineers who are energized by working on cutting-edge ASIC design and distributed software systems, and who are motivated to push the boundaries on how AI can transform everything from chip architecture to system performance at scale.

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.

Key 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

Minimum Qualifications

• 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

Preferred Qualifications

• 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

Job Location: This role may work remote from Costa Rica via an EOR (Employer of Record).

We offer a competitive compensation package that includes base salary, performance incentives and equity participation.

At Cornelis Networks, your compensation is only one component of your comprehensive total rewards package. Compensation will be determined by factors such as experience, qualifications, skills, and location relative to the hiring range for the position. 

Depending on your geographic location, in addition to your total rewards package, you may also be eligible for additional benefits, paid holidays, and flexible work arrangements.

Cornelis Networks does not accept unsolicited resumes from headhunters, recruitment agencies, or fee-based recruitment services. Cornelis Networks is an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.