Cisco Silicon One is seeking an experienced and highly motivated C++ Software Engineer to join the Compiler team of our Network Technology R&D organization, contributing directly to the evolution of next-generation networking products.

Meet the Team

Our team builds firmware, SDKs, simulators, and compilers for the Cisco Silicon One™ architecture — the industry’s first routing and switching silicon architecture unifying networking across all layers. You will work on pioneering technology that powers the future of the Internet.

You will be part of a global team working on the newest generation of Cisco silicon, which will be integrated across the entire portfolio of Cisco devices.

You will collaborate with worldwide distributed R&D centers, gaining exposure to some of the most talented engineers in the networking industry. We look for people who love technology and engineering—people who thrive on innovation, continuous learning, and challenging what’s possible.

Your Impact

• Design, implement, and test a state-of-the-art optimizing compiler for Cisco Silicon One™
• Evaluate and optimize code performance, including debugging, code generation improvements, and pipeline analysis
• Develop, optimize, and enhance the compiler backend to fully leverage cutting-edge hardware capabilities
• Solve complex resource management challenges across hardware pipelines
• Design and implement new P4 language features that empower network application developers
• Build and maintain the compiler toolchain for custom networking applications
• Contribute to libraries, analysis tools, and supporting infrastructure
• Collaborate with cross-functional hardware and software teams
• Work closely with ASIC engineers on next-generation IC design, influencing hardware through compiler insights prior to tape-out

Minimum Qualifications

• 3+ years of experience developing or maintaining large-scale software projects
• Bachelor’s or Master’s degree in Computer Science or related field
• Strong skills in modern C++, software design, and debugging
• Fluent in written and spoken English

Preferred Qualifications

• Experience with compiler infrastructures (LLVM, MLIR)
• Knowledge of compiler optimization (theoretical or practical)
• Experience with Python, ANTLR, SWIG, or similar tools
• Background in hardware/software co-design
• Understanding of performance analysis and profiling techniques
• Excellent analytical and problem-solving abilities
• Motivated to learn, proactive, and comfortable working autonomously

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Why Cisco?

At Cisco, we’re revolutionizing how data and infrastructure connect and protect organizations in the AI era – and beyond. We’ve been innovating fearlessly for 40 years to create solutions that power how humans and technology work together across the physical and digital worlds. These solutions provide customers with unparalleled security, visibility, and insights across the entire digital footprint.

Fueled by the depth and breadth of our technology, we experiment and create meaningful solutions. Add to that our worldwide network of doers and experts, and you’ll see that the opportunities to grow and build are limitless. We work as a team, collaborating with empathy to make really big things happen on a global scale. Because our solutions are everywhere, our impact is everywhere.

We are Cisco, and our power starts with you.