Network Engineer – Design & Engineering

FluidStack

Network Engineer designing lossless AI data-center fabrics for Fluidstack’s frontier compute infrastructure. Producing topologies, routing policies, physical designs, and validated architectures for massive GPU clusters.

Posted 8/4/2026full-timeNew York City • California, New York, Texas, Washington • 🇺🇸 United StatesMid-LevelSenior💰 $162,000 - $202,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in designing and deploying data center network fabrics, with a strong focus on lossless RDMA and advanced networking topologies. Capable of collaborating across multiple teams to ensure operational soundness and buildable designs.

Highest-signal resume keywords

Data Center Network DesignLossless RDMA (RoCEv2) Fabric DesignLayer 1 to Layer 3 Networking ExpertiseCLOS/Fat-Tree TopologiesBGP and EVPN/VXLAN Knowledge

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Network Design LifecycleTopology DesignRouting PolicyFabric ConfigurationCongestion ManagementTraffic ClassesECMPFirst Principles ReasoningDesign Documentation (HLDs, LLDs)Cabling Specifications

Soft Skills

CollaborationProblem Solving

Tools & Technologies

NVIDIA PlatformsAMD PlatformsCustom Accelerator Platforms

Industry Keywords

AI Training and InferenceData Center OperationsNetworking FundamentalsDistributed-Training Communication Patterns

Tech Stack

Tools & technologies

Airflow

About the role

Key responsibilities & impact

Own the network design lifecycle from customer requirements through deployable, validated architectures for AI training and inference
Produce topology designs, IP/addressing schemes, routing policy, and fabric configuration specifications across front-end, back-end GPU-to-GPU training, and storage networks
Adapt architectures to NVIDIA, AMD, and custom accelerator platforms, form factors, rack layouts, power envelopes, and cabling approaches
Translate logical designs into physical infrastructure, including rack elevations, power constraints, structured cabling, fiber budgets, pathway routing, and airflow considerations
Design lossless Ethernet fabrics for RoCEv2 RDMA, including PFC, ECN tuning, traffic classes, congestion management, ECMP, and distributed-training communication patterns
Produce HLDs, LLDs, cutsheets, BOMs, cabling matrices, and design decision records
Lead design reviews and reusable reference architectures
Partner with Hardware, DC Operations, ICT, Software, and Validation teams to ensure designs are buildable and operationally sound

Requirements

What you’ll need

Experience designing data center network fabrics from requirements through deployment
Deep Layer 1 to Layer 3 expertise
Knowledge of CLOS/fat-tree topologies, BGP, EVPN/VXLAN, and underlying networking fundamentals
Experience designing lossless RDMA (RoCEv2) fabrics
Understanding of congestion management at training scale
Ability to reason from first principles through novel design challenges
Ability to partner across Hardware, DC Operations, ICT, Software, and Validation
Bonus: source-of-truth-driven design generation
Bonus: multi-vendor GPU platform integration
Bonus: experience with clusters of 100,000+ accelerators

Benefits

Comp & perks

Equity for all full-time roles
Retirement or pension plan, in line with local norms
Health, dental, and vision insurance
Generous PTO policy, in line with local norms
Competitive base salary
Meaningful equity / restricted stock units