Software Engineer, Storage Systems (Agent Infra)

Baseten; United States; Remote; USD 180,000 - 240,000; Full time

Job summary

Baseten is building Agent Drive, a distributed filesystem powering sandboxes and multi-tenant storage. This role focuses on core storage features, metadata replication, and performance-critical paths.

You will own startup scalability, isolation, and observability across the storage stack, from kernel interactions to user-space interfaces, shipping in weeks rather than years.

Qualifications

• Strong systems programming background in Go, Rust, and/or C/C++.

Responsibilities

• Design and implement core Agent Drive features: metadata replication, volume placement, garbage collection, and FUSE client behavior.
• Solve multi-attach correctness: cache coherency across many FUSE mounts, dentry and inode invalidation, write ordering, and crash consistency.
• Optimize tail latency on read and write paths, including page cache strategy, writeback, prefetch, and metadata RPC batching.
• Build tenant isolation into the storage layer, including quota enforcement, blast-radius containment, and noisy-neighbor mitigation.
• Own the storage side of sandbox startup and resume performance.
• Build observability into every layer, drive storage incidents end to end, and turn each one into a permanent fix.
• Contribute upstream to the open-source storage projects we build on

Skills

Go

Rust

C/C++

Linux filesystem

Distributed storage

Tools

FUSE

Content-addressable storage

VFS

Job description

ABOUT BASETEN

Baseten powers mission-critical inference for the world's most dynamic AI companies, like Cursor, Notion, OpenEvidence, Abridge, Clay, Gamma, and Writer. By uniting applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. We're growing quickly and recently raised our $1.5B Series F, led by Altimeter Capital, Conviction Partners, and Spark Capital. Join us and help build the platform engineers turn to ship AI products.

THE ROLE

Storage decides how fast agent sandboxes start and how safely they share data. Agents need a filesystem that thousands of sandboxes mount at the same time, with strict isolation and the consistency agents need. Agent context is mostly small files, so the access patterns look very different from storage built for large files.

The Agent Infra team builds Agent Drive, the distributed filesystem that agent sandboxes mount over FUSE, and the storage underneath it. The work uses tiered caching, replication, content-addressed data, and Linux filesystem internals. In September 2026, Baseten acquired Blaxel, whose sandboxes and Agent Drive filesystem are the foundation for Baseten Sandboxes.

We are building a cloud, not just using one, so storage is designed for many tenants from day one. The team is small and ownership is big: we ship in weeks and months, not multi-year programs.

If you care about page cache coherency, FUSE, replication protocols, and content-addressable storage, we'd love to talk.

EXAMPLE INITIATIVES

• Blaxel is joining Baseten to build the future of agentic infrastructure
• Baseten Sandboxes documentation

RESPONSIBILITIES

• Design and implement core Agent Drive features: metadata replication, volume placement, garbage collection, and FUSE client behavior
• Solve multi-attach correctness: cache coherency across many FUSE mounts of the same drive, dentry and inode invalidation, write ordering, and crash consistency
• Optimize tail latency on read and write paths, including page cache strategy, writeback, prefetch, and metadata RPC batching
• Build tenant isolation into the storage layer, including quota enforcement, blast-radius containment, and noisy-neighbor mitigation
• Own the storage side of sandbox startup and resume performance
• Build durable block storage for sandboxes alongside other Baseten storage teams
• Build observability into every layer, drive storage incidents end to end, and turn each one into a permanent fix
• Contribute upstream to the open-source storage projects we build on

REQUIREMENTS

• Strong systems programming background in Go, Rust, and/or C/C++, with comfort reading kernel code
• Deep understanding of Linux filesystem and storage internals: VFS, page cache, dentry and inode caches, FUSE, the block I/O stack, fsync semantics, and crash consistency
• Hands-on experience building distributed storage systems, content-addressable storage, or large-scale caching infrastructure
• Experience profiling I/O, memory