Software Engineer (f/m/d) - Kernel development (Storage, RDMA)

At IONOS, the leading European provider of cloud infrastructure, cloud services and hosting services, you will work together with a wide range of teams. We are characterized by open structures, a friendly working culture and flat hierarchies with a strong team spirit. We firmly believe that work and fun are compatible, and offer you the right environment for this. Our constant growth means that we are always looking for new colleagues. Become part of IONOS and grow with us.

The data centers behind the IONOS Cloud IaaS consist of hypervisor machines hosting the customer VMs and the storage machines providing the persistent storage. The machines are interconnected via a low latency rdma network. The software side of our storage stack is based on the upstream Linux Kernel drivers, yet to be open-sourced in-house solutions and the provisioning/cloud orchestration software. The Cloud Storage Development Kernel Team is responsible for designing, developing, maintaining, troubleshooting, as well as evaluating and optimizing the performance, reliability, and efficiency of this stack.

Keywords: Kernel developement, Storage, RAID, Linux block layer, RDMA programming, Linux kernel, Operating system developement.

Tasks

• Add new features, improve efficiency, stability and performance of the software components of our storage stack.
• Get involved in new kernel driver development from conceptual design to implementation and to the deployment strategy. 
• Work on preparation of newly developed components for open sourcing and inclusion into mainline. 
• Contribute to the upstream kernel drivers (RNBD/RTRS, block layer, RDMA, etc); take part in the corresponding mailing-list discussions. 
• Code, document, and release software following the latest industry-proven development processes.

Qualifications

• 4+ years of relevant professional experience in Kernel/OS development.
• Strong knowledge of the Linux operating system, kernel internals, and corresponding development environments.
• Excellent proficiency in C programming and debugging; Knowledge and experience in Python and Bash.
• Experience in the development of the Linux kernel and/or its modules.
• Practical experience in one or more of the following areas: kernel block layer, distributed block devices, RAID based replication, RDMA programming.
• Demonstrates strong ability for independent learning and problem-solving while thriving in team environments by effectively collaborating and contributing to shared objectives.

Nice to have

• Experience contributing to the upstream Linux kernel.
• Experience in designing and implementing algorithms to enhance performance, efficiency, and reliability.
• Knowledge and experience in Go.

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.

About IONOS

IONOS is the leading European digitalization partner for small and medium-sized businesses (SMB). The company serves around six million customers and operates across 18 markets in Europe and North America, with its services being accessible worldwide. With its Web Presence & Productivity portfolio, IONOS acts as a 'one-stop shop' for all digitalization needs: from domains and web hosting to classic website builders and do-it-yourself solutions, from e-commerce to online marketing tools. In addition, the company offers Cloud Solutions to enterprises who are looking to move to the cloud as their businesses evolve. 

We value diversity and welcome all applications - regardless of, for example, gender, nationality, ethnic or social origin, religion, disability, age as well as sexual orientation and identity, physical characteristics, marital status or any other irrelevant factor subject to applicable law.