With its business applications, IONOS is one of the leading hosting and cloud applications providers in Europe. With our state-of-the-art technologies, we convince more than 8 million customers in many different countries every day.

Your Tasks

• Optimise and debug our kernel and RNBD storage backend solutions for our virtual data centre environment to achieve the best stability.
• Plan seamless kernel upgrades for the existing stack and help make them happen.
• Get involved in development from conceptual design to implementation and to the deployment strategy in close cooperation with other teams.
• Together with our QA Automation Engineers, draft and execute test plans for features, performance, load, stress, endurance and security, including fault injection.
• Give back to the community: bring in-house contributions upstream and help fix upstream bugs.
• Grow your peers in terms of development and testing expertise.

We appreciate

• Proven track record of upstream Linux kernel (KVM, storage or network) contributions.
• Being fluent in Bash, Python or Rust.
• Experience with the x86_64 CPU architecture, including analyzing and documenting software bugs. ARM is an advantage.
• Good knowledge of the kernel memory and processing stacks is an advantage, the same for InfiniBand technology.
• Being innovative, present new ideas about features, performance and stability.
• Communication and presentation skills.
• Fluent in English.