Introduction
Are you interested in operating systems development and Open Source? Your favorites are Linux and low-level programming? Would you like to be part of an Open Source community, and do you intend to build up a reputation as an Open Source maintainer? If so, our team is the right place for you!

Your Role and Responsibilities
Our Linux development team is responsible for enhancing the Linux kernel for IBM Z / IBM LinuxOne including its device drivers, libraries, tools, compilers, debuggers, virtualization (KVM) and test automation (CI/CD). We tightly collaborate with the international development teams of IBM (e.g. hardware and firmware development), the global maintainers of Open Source communities, and our Linux distribution partners (Red Hat, SUSE, Canonical). Our focus is on the support of the IBM Z / LinuxONE architecture, e.g. new processor instructions, new I/O attachments (PCIe, NVMe, Ethernet, RDMA etc.) and accelerators for AI and cryptographic functions. Linux on IBM Z / LinuxONE forms the basis of many of IBM’s commercial solutions in Cloud, Analytics, Finance, and AI.

As a key member of our dynamic team, you will play a vital role in crafting exceptional software experiences.

Your responsibilities will comprise of design and specifications for new enhancements, coding, test automation, problem determination and bug fixing, performance analysis, submitting your code to upstream community repositories, and solving client problems. Your attendance at Open Source community meetings is recommended and supported, and client facing activities (e.g. client support, providing lectures at conferences) are possible. You will closely interact with the respective Open Source communities (“upstream integration” of your code) and our distribution partners (Red Hat, SUSE, Canonical).

In this job offering, we are specifically looking for a new team member to grow our compilers/toolchain development squad.

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Required Technical and Professional Expertise

• 3+ years of experience in Open Source development in one or more areas of LLVM, GCC, Glibc, GDB
• 2+ years of experience in low-level/assembler development (preferably on non-x86 architectures)
• 2+ years of experience in operating systems, compiler development and performance optimizations
• Expert skills in source code repository systems (e.g. git), scripting languages (e.g. Python) and test Automation (e.g. Jenkins) skills
• You are highly motivated

Preferred Technical and Professional Expertise

• Contributions to Open Source projects or Open Source maintainer status (for multiple years)
• Skills in emulation (e.g. qemu TCG) technologies
• Skills in low-level performance analysis and tuning (sampling, tracing)
• Skills in IBM Z architecture (“Principles of Operations”), Z assembler
• Demonstrated communication skills