Senior Member of Technical Staff

Qumulo•Seattle, WA

3d•$200,000 - $300,000•Hybrid

About The Position

Qumulo is a software-defined cloud data platform. Our core is a distributed storage operating system in C & Rust, holding exabytes in the datacenter, at the edge, and natively in the cloud. Qumulo serves everything from a hospital's medical imaging archive to an animation studio's render farm in an environment where 99% correct doesn’t cut it. About the Senior MTS Role: You'd work across our distributed storage engine and the services that help customers store, manage, and protect their data. This includes a fault-tolerant block layer that erasure-codes and distributes data beneath the file system, a transactional file system where aggregates roll up as they change so a query across billions of files answers in real time instead of walking a tree, and that same machinery drives quotas, capacity trends, snapshot policy, multiple access protocols, plus replication and backup - all running in userspace. All of which makes Qumulo a distributed operating system problem: scheduling, memory hierarchy, protection, and concurrency. We're AI-forward and specific about what that means. Agents may write code, but engineers own every design decision, and nothing ships that isn't right. Why work at Qumulo? Qumulo blends the flexibility of a startup with the security of a mature and profitable organization. Here you’ll work closely with a small team of smart, capable engineers - and the folks you interview with are the ones you’ll work alongside. Opinions are expected, disagreement is normal, and you'd own designs from ideation to release. We value quality, correctness, and performance. Our architecture, protocols, and patents are public, so you can read how most of this works before you talk to us - and we’re small enough that your work shows up in the product.

Requirements

6+ years building systems software, including something at the level of a file system, kernel, database engine, compiler, driver, or distributed data path
You write C, C++, or Rust by choice
You leverage AI coding tools every day, and you can point to something complex that you couldn't have built without them.
You know where the tools break down, and delegate execution while retaining the judgement
You've worked inside a real distributed system and can talk about concurrency, consistency, failure, and recovery from experience
You go deep on root causes, and you're comfortable in code you didn't write
Must be authorized to work in the United States. We are unable to provide visa sponsorship or transfer.

Nice To Haves

distributed file systems, NFS, SMB, or S3.
Platforms like NetApp, PowerScale, Isilon, VAST, WEKA, Ceph, or Lustre.
Indexing, query, or search internals.
A public open source contribution, write-up, or project you built.

Responsibilities

Design and build across the file system and block layer beneath it, in C and Rust
Work with a team of super smart people to solve hard problems
Take designs, including your own, from rough thesis to shipped code
Get real leverage out of coding agents in an environment where being close isn't good enough
Debug across protocol, file system, cache, network, and object store
Find the correctness bugs that only surface under real world conditions
Leave everything you touch better than you found it
Prototype the next thing worth building and bring it to the team