Lead Systems Software Engineer - Object Storage

Quantum Default Brand; Centennial (CO); Hybrid; USD 160,000 - 200,000; Full time

Benefits offered by this job

Hybrid work arrangement

Job summary

Quantum is seeking a Lead Systems Software Engineer for the Centennial, CO object storage team. You will act as technical lead, hands-on, shaping data path, S3 API, and durability features across NVMe, HDD, and tape storage.

You will design critical components, supervise reviews, mentor engineers, and collaborate with product and other ActiveScale teams. Hybrid work Tue-Thu in Centennial office.

Qualifications

• 10+ years of software development experience with Go, Python, C, C++, or Rust.
• Strong experience with distributed systems and high‑performance storage software design.
• Hybrid role requiring in-office presence in Centennial, CO Tue–Thu.

Responsibilities

• Act as the technical lead for the Centennial object storage team while remaining hands-on.
• Drive architectural decisions for data path, durability, S3, and data movement.
• Design and build components, lead code reviews, and ensure CI coverage.
• Mentor engineers and develop technical ownership across the team.
• Collaborate with the Software Engineering Manager and Product Owner on scope and delivery.

Skills

Go

Python

C

C++

Rust

Distributed systems

Tools

Linux

S3-compatible APIs

OCaml

Job description

Lead Systems Software Engineer - Object Storage

Job Category: ENG - Software

Requisition Number: LEADS002524

• Posted : October 22, 2026
• Full-Time
• Hybrid

Locations

Showing 1 location

Centennial, CO 80112, USA

Key Responsibilities - Technical Leadership

• Act as the technical lead for the Centennial object storage team while remaining substantially hands-on.
• Lead technical direction and drive key architectural decisions across the team's areas of ownership, including the data path, durability, S3, and data movement.
• Design and build critical components, lead design and code reviews, help engineers solve complex systems problems, and ensure appropriate automated testing and CI coverage for critical changes.
• Mentor engineers and develop technical ownership across the team.
• Partner with the Software Engineering Manager / Product Owner on scope, sequencing, technical risk, and delivery.

Object Storage Data Path & S3

• Design, implement, and optimize features in the ActiveScale data path, handling the flow from incoming S3 requests to durable storage across NVMe, HDD, and tape.
• Implement and extend the S3 API, ensuring correct protocol behavior and efficient request handling.
• Improve latency, throughput, scalability, and reliability of the I/O pipeline for exabyte-scale deployments using Linux profiling and systems debugging.
• Own complex durability and data-placement work, including two-dimensional erasure coding, and ensure correctness under failures such as node loss, disk faults, partial writes, and network partitions.
• Analyze and optimize concurrency, throughput, and fault tolerance across the request and storage paths.

Scalability & Data Movement

• Design and improve systems that move and tier data from high-performance NVMe through HDD to the tape cold-storage tier (ActiveScale Cold Storage).
• Drive the evolution of internal APIs, services, and interfaces that support the data path and data mover.

Required Qualifications

• 10+ years of software development experience using Go, Python, C, C++, or Rust (or equivalent systems-level expertise), with a willingness to learn additional languages.
• Strong experience with distributed systems and high-performance storage software design.
• Strong Linux experience, including systems programming, debugging, profiling, and performance analysis of complex systems.
• Solid understanding of concurrency, synchronization, locking, asynchronous programming, and memory management in performance-sensitive software.
• Understanding of cloud and enterprise storage concepts and the characteristics of storage media such as HDD, SSD, NVMe, and tape.
• Experience with object storage or S3-compatible APIs.
• Demonstrated technical leadership of a team or significant engineering workstream.
• Strong communication skills and ability to collaborate across teams, including collaboration with the established ActiveScale engineering teams in Belgium.
• This is a hybrid role, with in-office work at our Centennial, CO office Tuesday through Thursday.

Preferred / Nice-to-Have Skills

• Experience with the Linux I/O subsystem and networking.
• Knowledge of erasure coding principles.
• Experience with storage protocols and clustering design and development.
• Experience with REST, gRPC, or Thrift.
• Experience with Amazon S3 APIs, SDKs, and tools.
• Familiarity with OCaml is welcome but not required; parts of the existing ActiveScale codebase are written in it.

Quantum provides a diverse portfolio of health plans for medical and prescription, dental, vision, life, disability, and supplemental medical insurance options. We also support our team members' efforts to develop and maintain a healthy lifestyle through reimbursement and educational programs. Quantum offers a company-matched 401(k) plan to help employees save for retirement in a tax-advantaged way. We also have an Employee Stock Purchase Program for purchasing Quantum stock at a discounted rate.

Anticipated Salary Range: $160,000 to $200,000 for qualified applicants.

The above pay range represents Quantum's good faith and reasonable estimate of possible compensation at the time of posting. Pay within the range will be based on a variety of factors, including but not limited to, relevant experience, knowledge/education, skills/abilities, internal equity, and budgetary considerations.

Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities
This employer is required to notify all applicants of their rights pursuant to federal employment laws.For further information, please review the Know Your Rights notice from the Department of Labor.