Kubernetes Network Development Engineer

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The Kubernetes Network developing Engineer will focus on networking for K3s clusters deployed across hybrid architectures (x86, ARM, accelerators). The role involves designing, implementing, and maintaining cluster networking that integrates with external systems. This includes writing Kubernetes controllers, managing IP address allocation, configuring VLANs outside of K3s and exposing them inside, extending networking with Multus CNI, and ensuring clusters support advanced CNI (Cilium/Calico) and bare‑metal load balancing.

The engineer ensures application and infrastructure networking is reliable, scalable, and secure.

· Architect and implement networking for hybrid K3s clusters.

· Configure and optimize CNIs (Multus, Cilium, Calico) for multi‑network scenarios.

· Enable VLAN‑backed networks, SR‑IOV, and multi‑interface workloads.

· Deploy and manage bare‑metal load balancers (Metal

LB, BGP).

· Build custom Kubernetes controllers/operators in Go for declarative networking.

· Automate IPAM, DNS integration, and network provisioning across hybrid environments.

· Ensure seamless Git Ops integration with CRDs and controllers.

· Implement network policies, encryption, and observability (Cilium Hubble, Prometheus).

· Collaborate with Dev Ops, SRE, and hardware teams to align with platform needs.

· Document architecture, runbooks, and provide internal knowledge transfer.

· Deep expertise in Kubernetes/K3s networking and CNIs.

· Hands‑on experience with Multus, Cilium, Calico, and Metal

LB.

· Proficiency in Linux networking (netlink, iproute2, eBPF).

· Experience with IPAM, VLAN bridging, DHCP/DNS integration.

· Security‑first mindset: RBAC, network policies, encryption.

· Familiarity with service mesh (Istio, Linkerd) and high‑performance networking (SR‑IOV, DPDK).

· Bonus:
Contributions to Kubernetes networking or CNI projects.

Focus on Connectivity and Network Engineering. Fully competent in own area. Acts as a key contributor in a more complex or critical environment. Proactively acts to understand and anticipates client needs. Manages costs and profitability for a work area. Manages own agenda to meet agreed targets. Develop plans for projects in own area. Looks beyond the immediate problem to the wider implications.

Acts as a facilitator, coach and moves teams forward.

The base compensation range for this role in the posted location is: $72,800 - $148,510/year.

Capgemini provides compensation range information in accordance with applicable national, state, provincial, and local pay transparency laws. The base compensation range listed for this position reflects the minimum and maximum target compensation Capgemini, in good faith, believes it may pay for the role at the time of this posting. This range may be subject to change as permitted by law.

The actual compensation offered to any candidate may fall outside of the posted range and will be determined based on multiple factors legally permitted in the applicable jurisdiction.

These may include, but are not limited to:
Geographic location, Education and qualifications, Certifications and licenses, Relevant experience and skills, Seniority and performance, Market and business consideration, Internal pay equity.

It is not typical for candidates to be hired at or near the top of the posted compensation range.

In addition to base salary, this role may be eligible for additional compensation such as variable incentives, bonuses, or commissions, depending on the position and applicable laws.

Capgemini offers a comprehensive,…