Techops/devops Engineer: Linux Kernel Developer

2 weeks ago

Singapore Shopee Full time

DepartmentEngineering and Technology

LevelExperienced (Individual Contributor)

LocationSingapore

The Engineering and Technology team is at the core of the Shopee platform development. The team is made up of a group of passionate engineers from all over the world, striving to build the best systems with the most suitable technologies. Our engineers do not merely solve problems at hand; We build foundations for a long-lasting future. We don't limit ourselves on what we can or can't do; we take matters into our own hands even if it means drilling down to the bottom layer of the computing platform. Shopee's hyper-growing business scale has transformed most "innocent" problems into huge technical challenges, and there is no better place to experience it first-hand if you love technologies as much as we do. Browse our Engineering and Technology team openings to see how you can make an impact with us.
- Develop Linux Kernel new features and improve stability according to Shopee's scenarios
- Improve Linux Kernel's resource isolation and control on CPU/GPU/Memory/IO/Network in online service/batch job colocation
- Integrate with virtualisation components such as Kernel-based Virtual Machine/Qemu, container runtime components such as runc/containerd/CRI, resource scheduling components such as Kubernetes/Yarn
- Enhance performance and resource utilisation on node
- Conduct performance tuning on Linux Kernel according to different businesses, build and improve SLI/SLO
- Work closely with the Machine Reliability Engineering team on Kernel issues daily support, ensure Linux Kernel's stability
- Research and adopt cutting-edge technologies on Linux Kernel area

**Requirements**:

- Bachelor's or higher degree in Computer Science or related fields
- Familiar with Linux dynamic tracing and performance profiling (ebpf, perf, systemtap)
- Experience with software troubleshooting
- Skilled at Linux Kernel issues debug, such as soft lockup, hard lockup, dead lock, panic, OOM
- Experiences in complicated system softwares' design, development and optimisation
- Familiar with Linux Kernel source code, at least read 2~3 major modules' source code (scheduling, file system, network, I/O, memory management)

**Skills below are optional but preferable**:

- Familiar with container related technologies' implementation (cgroup v2, namespaces, ebpf) and read corresponding code
- Familiar with virtualisation technologies' implementation (KVM, Xen) and read corresponding codes
- Experiences in Linux Kernel performance tuning and customisation
- Contributed and submitted patches to Linux Kernel upstream
- Experiences in large scale IaaS platform or private cloud products

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