Senior Network Engineer (f/m/x)

We are looking for an experienced Networking Software Engineer to join a project focused on next-generation DPU platforms for hyperscale cloud, AI/ML, and HPC environments. You will work close to the Linux kernel and networking stack, developing and optimizing high-performance networking software, device drivers, and packet processing solutions. The role combines deep, hands-on C/C++ development with system-level debugging, performance optimization, and close collaboration with hardware, firmware, and architecture teams. If you have strong experience in Linux kernel development, networking internals, and high-performance packet processing and want to work on complex networking solutions at the hardware-software boundary, this role is for you. Your tasks

• Developing and maintaining high-performance networking software and Linux device drivers for next-generation DPU platforms
• Designing and optimizing high-speed packet processing data paths
• Working with Linux networking internals and hardware acceleration technologies
• Investigating and resolving complex networking performance bottlenecks
• Debugging and optimizing networking software in complex production environments
• Collaborating with hardware, firmware, and architecture teams on system-level solutions
• Taking technical ownership of implementation and contributing to key architectural decisions
• Participating in code reviews, system integration, automation, and CI/CD activities

Requirements

• At least 10 years of professional experience in networking software development
• Strong hands-on experience in Linux kernel and device driver development
• Deep understanding of Linux networking internals, including the networking stack, netdev, packet processing, and performance tuning
• Proven experience with Ethernet, IPv4/IPv6, TCP, UDP, and high-performance packet processing systems
• Advanced C/C++ programming skills in Linux environments
• Strong system-level debugging and performance optimization skills
• Proven experience in solving complex performance issues in production environments
• Hands-on implementation experience and ability to take technical ownership of delivered solutions
• Experience with Git and modern software development practices
• Very good command of English

Job no. JOB-78HQR Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws. Benefits For You

• Great Place to Work
• Solid financial situation
• Contracts with the biggest brands
• Centre of internal trainings
• Many experts you can learn from
• Open and accessible management team
• Profit sharing
• Passion Sponsorship program
• Regular integration events and trips
• Comfortable and well-equipped offices
• MySii app
• Medical care