Introduction

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Your Role and Responsibilities

IBM's Ceph[1] engineering organization is looking for a senior software engineer to join the CephFS team as a kernel developer. In this role you will collaborate with our worldwide Ceph engineering team to develop and enhance CephFS[2], the file system component of the Ceph software-defined storage system, with a focus on our Linux kernel client[3]. You will design and implement new capabilities and features to enable new use cases while improving scalability, performance and efficiency. You will participate in a vibrant and active open source community[4] to deliver enterprise-quality software.

CephFS comprises a wide-ranging software suite including its Linux kernel client, a clustered userspace metadata server, and a messaging layer for storing data with Ceph's native object store ('RADOS'), in addition to higher-level APIs for integrating with other systems (OpenStack, Kubernetes, an NFS-Ganesha gateway cluster, etc). As a member of the CephFS engineering team, you will have the opportunity to learn and work in many of these areas according to your experience and technical background.

You will work remotely with a worldwide team so communication is key. You will collaborate with others using modern open source tools including git (and GitHub), Jenkins, Redmine, and community-developed testing and validation tools.

[2]https://docs.ceph.com/en/quincy/cephfs/, https://youtu.be/cNAxNSzZqzo?t=1311

Primary responsibilities

• Develop and debug the CephFS kernel client

• Test new features with Ceph's Python-language testing infrastructure ('teuthology')

• Occasionally, coordinate protocol changes with the Ceph Metadata Server (MDS) using C+* Support the Ceph community through engagement on mailing lists, IRC, and other public discussions

In your role, you will work closely with the global Ceph open-source, multi-company engineering team to develop and enhance CephFS, in particular its upstream Linux kernel client. You will collaborate with other developers and users by attending online meetings, participating in email lists and online chat rooms, preparing written documentation, and giving presentations about your work. You will be expected to work proactively with other team members, the community, and the Linux upstream to develop your own knowledge, and to be ready to mentor new contributors as you develop expertise.

As a member of the team, you will contribute to the development of CephFS by designing and implementing new functionalities that enable innovative use cases. You will work principally on the upstream Linux kernel client to implement features in coordination with our existing maintainers. You may also design new distributed algorithms and implement them across the client and our C++ userspace servers (if interested and able), and will write automated test cases to demonstrate functionality and prevent regressions. You will also identify and fix bugs and propose performance enhancements.

Required Technical and Professional Expertise

• Experience in Linux kernel development, or demonstrated proficiency in C and a strong interest

• Good debugging skills. Experience with live systems (via logging and interrogation) and examining core files.

• Experience reading C++ codebases

• Basic knowledge of Python, to use and enhance testing

Preferred Technical and Professional Expertise

• Experience with data storage and/or file systems

• Experience working on distributed teams is a plus

• Past contribution to open source projects is favorable

• Knowledge of distributed systems

About Business UnitIBM Systems helps IT leaders think differently about their infrastructure. IBM servers and storage are no longer inanimate - they can understand, reason, and learn so our clients can innovate while avoiding IT issues. Our systems power the world's most important industries and our clients are the architects of the future. Join us to help build our leading-edge technology portfolio designed for cognitive business and optimized for cloud computing.

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Location StatementIBM offers a competitive and comprehensive benefits program. Eligible employees may have access to:

• Healthcare benefits including medical & prescription drug coverage, dental, vision, and mental health & well being

• Financial programs such as 401(k), cash balance pension plan, the IBM Employee Stock Purchase Plan, financial counseling, life insurance, short & long- term disability coverage, and opportunities for performance based salary incentive programs.

• Generous paid time off including 12 holidays, minimum 56 hours sick time, 120 hours vacation, 12 weeks parental bonding leave in accordance with IBM Policy, and other Paid Care Leave programs. IBM also offers paid family leave benefits to eligible employees where required by applicable law.

• Training and educational resources on our personalized, AI-driven learning platform where IBMers can grow skills and obtain industry-recognized certifications to achieve their career goals.

• Diverse and inclusive employee resource groups, giving & volunteer opportunities, and discounts on retail products, services & experiences.

The compensation range and benefits for this position are based on a full-time schedule for a full calendar year. The salary will vary depending on your job-related skills, experience and location. Pay increment and frequency of pay will be in accordance with employment classification and applicable laws. For part time roles, your compensation and benefits will be adjusted to reflect your hours. Benefits may be pro-rated for those who start working during the calendar year.

This position was posted on the date cited in the key job details section and is anticipated to remain posted for 21 days from this date or less if not needed to fill the role.

We consider qualified applicants with criminal histories, consistent with applicable law.

Being You @ IBMIBM is committed to creating a diverse environment and is proud to be an equal-opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, gender, gender identity or expression, sexual orientation, national origin, caste, genetics, pregnancy, disability, neurodivergence, age, veteran status, or other characteristics. IBM is also committed to compliance with all fair employment practices regarding citizenship and immigration status.