{"id":52781,"title":"Staff Software Engineer (f/m/d) Software-Defined Networking / 1648","company":"IONOS SE","city":"Berlin","region":"Berlin","location":"10245 Berlin","work_model":"hybrid","employment_type":"full_time","employment":["full_time"],"visa":"not_mentioned","relocation":"not_mentioned","posted_at":"2026-10-20T00:00:00+00:00","tools":["C++","Go","Python","Linux","Kubernetes","Git","IONOS","C"],"seniority":"lead","years_experience_min":null,"german_requirement":"not_mentioned","german_level":"unspecified","english_requirement":"not_mentioned","english_level":"unspecified","team_language":"unknown","confidence":0.4,"method":"rules","language_badge":"Not stated","language_evidence":null,"requirements_snippet":"- Proficiency in C/C++ and/or Golang, plus Python, including AI-assisted development. - Experience with Linux kernel networking internals. - Knowledge of the TCP/IP protocol family and routing protocols like BGP, plus networking …","url":"https://www.arbeitsagentur.de/jobsuche/jobdetail/10001-1003885201-S","source":"bundesagentur","description_text":"The IONOS Cloud SDN Development team is seeking a highly motivated and experienced software engineer. The SDN Development team designs, develops and maintains the high-performance Software-Defined Networking (SDN) stack of IONOS Cloud: the networking foundation that connects our customers' virtual machines and cloud services. Our work spans the Linux kernel networking layer, virtual switching and the control plane. We use a range of technologies, from C/C++ and Golang for performance-critical components to Python for tooling and automation.\n\n### Tasks\n\n- Developing and supporting the scalable, high-performance SDN stack of IONOS Cloud using a range of diverse technologies.\n- Designing new features and adopting new technologies (both hardware and \"software defined\") on different components of the SDN infrastructure.\n- Writing and debugging C/C++ and Golang/Python code across the SDN data plane and control plane, from Linux kernel networking and eBPF to Open vSwitch/OpenFlow pipelines.\n- Building Python tooling and automation for testing, deploying and operating the SDN stack, and troubleshooting network issues in virtualized environments (QEMU/KVM, VirtIO).\n- Cooperating with other teams to ensure the smooth integration of new SDN features with different IONOS products.\n\n### Qualifications\n\n- Proficiency in C/C++ and/or Golang, plus Python, including AI-assisted development.\n- Experience with Linux kernel networking internals.\n- Knowledge of the TCP/IP protocol family and routing protocols like BGP, plus networking technologies such as Open vSwitch, OpenFlow, VXLAN, VRF and eBPF.\n- Experience with cloud environments, Kubernetes and virtualization technologies like QEMU/KVM and VirtIO.\n- Experience with the GNU toolchain (gcc, gdb, make, etc.), git and the Linux CLI.\n- Experience with Linux system administration and automation.\n- Nice to have: experience with VPP and DPDK.\n\n### Benefits\n\n- Hybrid working model.\n- Flexible working hours through trust-based working hours.\n- At some locations a subsidized canteen and various free drinks.\n- Modern office space with very good transport connections.\n- Various employee discounts for activities and products.\n- Employee events such as summer and winter parties, as well as workshops.\n- Numerous training and development opportunities.\n- Various health offers, such as sports and health courses.","responsibilities_text":null,"requirements_text":"- Proficiency in C/C++ and/or Golang, plus Python, including AI-assisted development.\n- Experience with Linux kernel networking internals.\n- Knowledge of the TCP/IP protocol family and routing protocols like BGP, plus networking technologies such as Open vSwitch, OpenFlow, VXLAN, VRF and eBPF.\n- Experience with cloud environments, Kubernetes and virtualization technologies like QEMU/KVM and VirtIO.\n- Experience with the GNU toolchain (gcc, gdb, make, etc.), git and the Linux CLI.\n- Experience with Linux system administration and automation.\nexperience with VPP and DPDK.","status":"open","duplicate_of":null,"first_seen":"2026-11-02T15:09:41.359176+00:00","responsibilities_summary":null,"requirements_summary":null,"all_tools":["C++","Go","Python","Linux","Kubernetes","Git","IONOS","C"],"posting_language":"en","evidence":[],"years_experience_max":null,"mobility_evidence":[],"model_version":"rules-7","english_badge":"English not stated","company_id":null}