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We are seeking an experienced K8s core engineer to join our dynamic team at eBay in Dublin, Ireland. This role requires a solid understanding of linux kernel, container and kubernetes, proficiency in programming languages such as Go, and Python.

The ideal candidate will have at least 5 years of experience in the field, focusing on kernel development, os upgrading with regular time-manner. Additionally, you will contribute to open-source projects and implement observability practices to monitor and ensure the reliability of our systems.

Responsibilities:

• Develop stable and performance optimized Linux OS for kubernetes platform, build eBay in-house Linux kernel and OS images

• Design, develop, and maintain optimized Linux OS upgrade management system.

• Manage different kinds of runtimes in eBay cloud, including container, kata and virtual machines

• Develop high-performance applications in Go, and Python.

• Contribute to kernel development and optimization for improved system performance.

• Develop the BPF based tools for eBay cloud OS issue diagnostics. Develop BPF/Cilium based network segmentation and mesh system.

• Implement observability tools and practices to monitor system performance and health.

• Collaborate with cross-functional teams to adopt/verify new optimized Linux OS.

• Contribute to open-source projects.

• Stay updated with the latest developments in kernel enhancements, and security practices.

Qualifications:

• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field.

• At least 5 years of proven experience on Linux, familiar with Linux kernel development, and have knowledge of OS internals, especially the basic components, like process scheduler, memory management, file system and network.

• Strong programming skills in C++, Go, and Python.

• Expertise in using Kubernetes for orchestrating containerized applications to build patching systems.

• Familiar with network protocol, especially TCP/IP stack

• Experience with observability tools and practices.

• Excellent problem-solving and analytical skills.

• Strong communication and teamwork abilities.

Preferred Skills:

• Experience with linux kernel development/triage.

• Experience contributing to open-source projects.

• Certifications in Kernel, networking, Kubernetes, or related fields.

• Understanding Linux kernel tracing technologies or BPF is a plus. 

• Understanding Intel x86 architecture is a plus. 

• Understanding Qemu/KVM/Openvswitch is a plus.

• Experience in a high-traffic, large-scale environment.

• Familiarity with additional programming languages or frameworks.

• Proficiency in Agile development methodologies.

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