OpenZFS Developer

About Klara Inc. Klara provides open source development services with a focus on FreeBSD, ZFS, and Arm. Our mission is to advance technology through community-driven development while maintaining the ethics and creativity of open source. We help customers standardize and accelerate platforms built on FreeBSD and ZFS, combining internal expertise with active participation in the community. About The Role – OpenZFS Developer As an OpenZFS Developer reporting to the ZFS Engineering Manager, you’ll join a cross-functional team enhancing the OpenZFS file system. This includes designing and implementing new features, resolving complex bugs and performance issues, and contributing upstream across multiple operating systems. Key Responsibilities Develop OpenZFS features as part of a remote, global team Own the full lifecycle: design, implementation, review, upstreaming, and maintenance Analyze and resolve ZFS performance issues Collaborate with the community on patch submission and feedback Participate in monthly upstream developer meetings Work across Linux, FreeBSD, and illumos platforms Translate technical requirements into high-level design and documentation Skills And Qualifications Strong C programming and data structure fundamentals Proficiency with Git and source control workflows Understanding of ZFS internals (SPL, DMU, vdevs, etc.) Experience with VFS and OS-level file system design Knowledge of OS concepts: threading, locking, IPC, lifecycle management Proven ability to deliver on schedule Strong communication and documentation skills Experience with customers or end-user interaction Prior open source contributions; kernel development experience is a plus

Develop and enhance OpenZFS features while resolving complex bugs and performance issues. Collaborate with the global community to design, implement, and upstream patches across Linux, FreeBSD, and illumos platforms.

Requires strong C programming skills and a deep understanding of ZFS internals and OS-level file system design. Experience with kernel development and open source contributions is highly preferred.

• GitPreferred

Identified from the job description. Confirm important requirements above.

• C Programming
• Data Structures
• Git
• ZFS Internals
• VFS
• OS-level File System Design
• Threading
• Locking
• IPC
• Lifecycle Management
• Kernel Development
• Technical Documentation

• Software
• Engineering
• Technology

Minimum experience

2+ years

Apply by

Aug 31, 2026

Posting language

English

Working hours

40 hours per week

Seniority

Entry level