Principal Systems Engineer

Join to apply for the Principal Systems Engineer role at Arm
.

We are seeking a highly skilled and motivated Systems Engineer with a niche focus on network interconnects within blade and rack‑level systems
. This role is pivotal in designing, analyzing, and optimizing the physical and logical interconnection of compute, storage, and accelerator components in high‑performance systems. The ideal candidate will possess deep expertise in networking standards, topologies, and technologies used in datacenters, HPC systems, and cloud‑scale infrastructure.

• Define and architect rack‑level network topologies (e.g., 200/400/800 G Ethernet, Smart NICs, Network Security, etc.) for scalable system designs.
• Collaborate with hardware and software engineering teams to design network interconnect solutions aligned with performance, power, and cost goals within the rack.
• Evaluate and select network fabrics (e.g., Ethernet, Infini Band, CXL, PCIe) based on system requirements.
• Specifying, designing Scale‑Up and Scale‑Out Network Topologies.

• Model and simulate network performance across rack‑level systems.
• Perform bottleneck analysis and propose optimizations for bandwidth, latency, and reliability.

• Collaborate with platform and board teams to ensure seamless integration of interconnects at the physical and logical levels.
• Define test plans and support bring‑up and validation of networking subsystems.
• Work with industry network vendors to meet requirements for AI/ML systems.

• Maintain awareness of evolving standards (e.g., IEEE 802.3, OCP NIC, OSFP, QSFP‑DD) and contribute to internal guidelines.
• Ensure systems meet regulatory and industry compliance for networking hardware.

• Partner with software, firmware, and datacenter infrastructure teams for end‑to‑end functionality and compatibility.
• Work with vendors and technology partners for roadmap alignment and issue resolution.
• Collaborate with ODM partners to develop integration and test requirements and provide validation coverage.

• Bachelor’s or Master’s degree in Electrical Engineering, Computer Engineering, or a related field with 5+ years of experience in systems or network engineering, preferably in datacenter or HPC environments.
• Strong understanding of rack‑level network topologies and high‑speed interconnect technologies.
• Hands‑on experience with Ethernet and/or Infini Band networking, including QSFP/OSFP modules and switching.
• Familiarity with Layer 1–3 networking protocols and performance tuning.
• Experience with simulation tools and methodologies for network performance analysis.

• Knowledge of CXL, NVLink, or PCIe‑based interconnects.
• Experience with Open Compute Project (OCP) hardware and standards.
• Experience in thermal and power modeling related to networking hardware.
• Scripting skills (Python, Bash) for automation and analysis.

• Work on innovative rack‑scale systems that power modern compute workloads.
• Be part of a collaborative team innovating at the intersection of hardware and networking.
• Competitive compensation and benefits.
• Opportunities for career growth and continuous learning.

10x Mindset guides how we engineer, collaborate, and grow. Understand what it means and how to reflect 10x in your work:

Salary Range: $297,600-$402,600 per year

At Arm, we want to build extraordinary teams. If you need an adjustment or an accommodation during the recruitment process, please email  By sending us the requested information, you consent to its use by Arm to arrange for appropriate accommodations. All accommodation or adjustment requests will be treated with confidentiality and disclosed only as necessary to provide the accommodation.

Arm’s approach to hybrid working is designed to create a working environment that supports both high performance and personal well‑being. We believe in bringing people together face to face to enable us to work at pace, whilst recognizing the value of flexibility. Within that framework, we empower groups/teams to determine their own hybrid working patterns. Details of what this means for each role will be shared upon application.

Arm is an equal opportunity employer, committed to providing an environment of mutual respect where equal opportunities are available to all applicants and colleagues. We are a diverse organization of dedicated and innovative individuals, and do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.