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# Staff Software Engineer Virtual Network Functions

- **Company:** Berufliche Schulen Potsdam der ASG - Anerkannten Schulgesellschaft mbH
- **Location:** Berlin, Germany
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, C++ (Programming Language), Cloud Computing, Software Debugging, Linux, Linux Kernel, Linux System Administration, Network Virtualization, Open VSwitch, OpenFlow, Overlay Transport Virtualization, Virtualization Technology, Working Model 2D, Cloud Platform System, Computer Network Technologies, Git, Kubernetes, Virtual Network Functions (VNF), Golang
- **Published:** October 20, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=18c897e1e0fcc5bf

## About the Role

* Proficiency in Golang and/or C/C++, including AI-assisted development.
 * Hands-on experience with Kubernetes architecture and operations; knowledge aligned with CKA (Certified Kubernetes Administrator) principles.
 * Knowledge of the TCP/IP protocol family and networking technologies such as Open vSwitch, OpenFlow, VXLAN, VRF and eBPF.
 * Experience with cloud environments and virtualization technologies like QEMU/KVM.
 * Experience with the GNU toolchain (gcc, gdb, make, etc.), git and the Linux CLI.
 * Experience with Linux system administration and automation.
 * Nice to have: Linux kernel networking internals, VPP and DPDK.

## Description

The VNF Development team designs, develops and maintains the Virtual Network Functions (VNF) behind IONOS Cloud's network offerings. These products serve both our external customers and other internal IONOS teams. We build our VNFs in Golang and run them on Kubernetes, so the team works across the whole lifecycle: architecture, implementation, deployment and day-to-day operations. As part of the team, you'll play a crucial role in shaping and running these products.

We are looking for someone to join our team and work with us on providing the best VNF products possible.

Tasks

 * Developing and supporting our multiple modern, scalable and high-performance Virtual Network Functions (VNF) offerings of IONOS Cloud using a range of diverse technologies.
 * Designing new features and adopting new technologies (both hardware and "software defined") on different components of the VNF infrastructure.
 * Writing, testing and reviewing Golang services for our VNFs, using AI-assisted tooling as part of your daily development workflow.
 * Deploying, operating and troubleshooting VNF workloads on Kubernetes, including cluster operations, upgrades, monitoring and debugging network issues in production.
 * Cooperating with other teams to ensure the smooth integration of new Virtual Network Functions with different IONOS products.