Staff Software Engineer (f/m/d) Virtual Network Functions

IONOS Group; Berlin; Hybrid; EUR 70,000 - 110,000; Full time

Benefits offered by this job

Hybrid work model

Flexible hours

Subsidized canteen

Good transport access

Employee discounts

Team events & workshops

Training opportunities

Health programs

Job summary

IONOS Group's Cloud VNF Development team is seeking a highly motivated software engineer to design, implement and operate virtual network functions in Golang and Kubernetes. You'll write, test and review services, deploy and troubleshoot VNFs, and collaborate across teams to integrate VNFs with IONOS products.

The role offers hybrid work, flexible hours and opportunities for training. Join a team that shapes next-generation cloud networking at IONOS, with modern tech and strong transport

Qualifications

• Proficiency in Golang and/or C/C++, including AI-assisted development.

Responsibilities

• Develop and support VNF offerings using diverse technologies.
• Design new features and adopt new technologies on VNF infrastructure components.
• Write, test and review Golang services for VNFs with AI-assisted tooling.
• Deploy, operate and troubleshoot VNF workloads on Kubernetes, including cluster operations, upgrades, monitoring and debugging production network issues.
• Collaborate with other teams to integrate VNFs with IONOS products.

Skills

Golang

C/C++

AI-assisted development

Networking fundamentals

Tools

Kubernetes

QEMU/KVM

GNU toolchain

Linux CLI

Linux system administration

Open vSwitch

OpenFlow

VXLAN

VRF

eBPF

DPDK

Job description

The IONOS Cloud VNF Development team is seeking a highly motivated and experienced software engineer.

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.

Qualification

• 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.

Benefits

• Hybrid working model.
• Flexible working hours through trust-based working hours.
• At some locations a subsidized canteen and various free drinks.
• Modern office space with very good transport connections.
• Various employee discounts for activities and products.
• Employee events such as summer and winter parties, as well as workshops.
• Numerous training and development opportunities.
• Various health offers, such as sports and health courses.