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# Principal Software Engineer

- **Company:** Cisco Isovalent
- **Location:** Berlin, Germany
- **Experience:** Experienced
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, Application Programming Interfaces (APIs), Artificial Intelligence, Cloud Engineering, Software Quality, Linux, Distributed Systems, Network Security, Linux Kernel, Open Source Technology, Cloud Platform System, Kubernetes, Information Technology, Cisco
- **Published:** September 2, 2026
- **Apply:** https://dejobs.org/x/x/CF7ED44002AD4C2EB5BBF8064C0A9DC7/job/

## About the Role

and operational excellence. **Minimum Qualifications:** + Bachelors Computer Science degree, or related fields + 2+ years of upstream Linux kernel track record + 5+ years of experience in C + A public track record of open-source code commits is a must **Preferred Qualifications:** + Expert knowledge about Linux systems design, performance, security and/or networking, Linux kernel + 5+ years of upstream Linux kernel track record + 5+ years of experience in C, BPF as well as Go + Desire to write high quality and efficient code + Highly self-driven working individual + Experience designing and implementing APIs + Experience from working with production systems at scale, networking background is always a plus + Experience with Kubernetes, Cloud Native workloads and/or distributed systems **Why Cisco?** At Cisco, we're revolutionizing how data and infrastructure connect and protect organizations in the AI era - and beyond. We've been innovating

## Description

functionality related to BPF, networking and/or security in the Linux kernel as well as bringing the latter into Cilium and/or Tetragon. You will work with a highly collaborative and skilled team to build solutions that advance the next generation of networking and security in Kubernetes and cloud native environments. **What you'll do:** + Lead design and development of new Linux kernel functionality in the areas of BPF, the networking stack and/or the security subsystem and bring the new functionality into Cilium/Tetragon. + Collaborate in a small technical team working on forward-looking features, but also actively collaborate in the upstream Linux kernel community. + Engage with the team across engineering, product, and customers to align on future technical direction with business needs. + Possibility to speak at technical conferences to present and discuss your work (e.g., KubeCon, Linux Plumbers, LSF/MM/BPF). + Contribute to and uphold engineering best practices, code quality


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