Lightning AI

Senior Network Engineer

Remote · Senior · Remote

Good timing - competition is buildingVerified listingPosted 11d ago

Applicants who checked fit first are 3.1× more likely to hear back

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MEDIUM

Lightning AI is reviewing applications at a steady pace. Expect a standard response time as they evaluate the current pool.

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First 72 hours

Window passed - posted 11d ago

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Reposted role

This role was posted earlier, closed, and has now reopened - the company is accepting candidates again.

First posted Jun 4, 2026

Skills required

16 listed

Network ProvisioningComplex NetworksDirect ConnectDevelopment SupportPyTorch (Machine Learning Library)VoltageLinuxGraphics Processing Unit (GPU)+8 more

You almost certainly match several of these already. Unlock your skill map to see the matches, the gaps, and what to fix first.

Job description

Who We Are

Lightning AI is the company behind PyTorch Lightning. Founded in 2019, we build an end-to-end platform for developing, training, and deploying AI systems—designed to take ideas from research to production with less friction.

Through our merger with Voltage Park, a neocloud and AI Factory, Lightning AI combines developer-first software with cost-efficient, large-scale compute. Teams get the tools they need for experimentation, training, and production inference, with security, observability, and control built in.

We serve solo researchers, startups, and large enterprises. Lightning AI operates globally with offices in New York City, San Francisco, Seattle, and London, and is backed by Coatue, Index Ventures, Bain Capital Ventures, and Firstminute.

The Way We Work

The people who thrive here are builders who move fast, communicate openly, take ownership, and continuously improve themselves, their teams, and our company. Here's what that looks like in practice:

Move with Urgency: We move quickly, make thoughtful decisions, and keep momentum. We value action over perfection and learn by shipping.
Take Ownership: We own outcomes, not just our individual work. We make decisions that move the company forward and follow through.
Communicate Openly: We communicate directly, seek to understand, and create clarity for others. Honest conversations help us move faster together.
Build Great Teams: We lead by example, empower others, and create healthy teams where people can do their best work.
Raise the Bar: We're always improving ourselves. We learn from feedback, consistently challenge ourselves to grow, and focus on the work that matters most.
Think Long-Term: We design for what's next. We create scalable systems, simplify complexity, and use AI and automation to amplify our impact.

What We’re Looking For

Lightning AI is seeking a Senior Network Engineer with hands-on Cumulus Linux expertise to build and scale the network backbone behind our AI infrastructure platform. You’ll play a critical role in designing highly reliable, automated data center networks that support some of the most demanding AI workloads in the world.

This role is hybrid with a minimum of 2 in-office days per week in San Francisco, Seattle, or NYC, with fully remote work considered for candidates outside of our office hub locations. All employees participate in occasional team and company offsites.

What You'll Do

Design and deploy scalable spine/leaf network architectures for AI data centers
Engineer high-performance Ethernet fabrics supporting GPU clusters and AI workloads
Build and maintain EVPN/VXLAN, BGP, and high-speed routing environments
Optimize east-west traffic flows for AI training and inference operations
Support RoCE/RDMA networking and low-latency transport technologies
Support backbone, DCI, WAN, and edge connectivity solutions.
Collaborate with compute, storage, AI platform, and operations teams to deliver integrated infrastructure solutions
Develop automation and Infrastructure-as-Code (IaC) solutions for network provisioning and operations
Troubleshoot complex network, performance, and congestion issues across distributed environments
Improve network observability, telemetry, and operational visibility
You have hands-on experience working with SONiC and Junos.
Experience with cloud networking technologies including VPC’s, NFV, Direct Connect, Cloud Connect
You enjoy working with a small group of friendly, highly motivated, high-execution colleagues
You’re comfortable with a high degree of autonomy, can independently prioritize your work and understand how it maps to the overall needs and goals of the company
You’re knowledgeable in your domain but also enjoy wearing multiple hats and venturing outside of your comfort zone when the need arises
You value the ability to write well and understand the importance of good documentation

What You’ll Need

Required Qualifications

Experience with Cumulus NOS
5+ years of experience in large-scale data center networking
Experience in spine-leaf architectures and L3 fabrics
Experience with BGP, EVPN, VXLAN
Experience operating high-performance computing (HPC) or GPU-dense environments
Experience designing networks for hyperscalers, neoclouds, or high-scale SaaS infrastructure
Experience in automation with (Python, Ansible, Terraform, or similar)
Experience with network observability tooling and telemetry pipelines
Proven ability to design systems that scale to thousands of nodes
Strong documentation and communication skills

Ideal Experience

Familiarity with NVIDIA networking (Spectrum, Quantum, BlueField, etc.)
Familiarity with RDMA, RoCE, or InfiniBand fabrics
Experience with multi-region backbone design
Exposure to bare-metal provisioning systems
Experience working in high-growth infrastructure startups

Compensation

We are committed to offering competitive compensation that reflects the value each team member brings to our mission. Final offers are based on factors such as experience, skills, geographic location, and role expectations. In addition to base salary, our total rewards package for eligible roles includes a discretionary bonus, a meaningful equity component, and comprehensive benefits.

The anticipated annual base salary range for this role is:

$150,000—$190,000 USD

Benefits and Perks

We offer a comprehensive and competitive benefits package designed to support our employees’ health, well-being, and long-term success:

Comprehensive Health Coverage: Medical, dental, and vision coverage for employees and eligible dependents.
Meaningful Equity: RSUs that give employees a stake in the company's long-term success.
Retirement Savings: 401(k) matching (U.S.) and pension contributions (U.K.).
Flexible Time Off: Unlimited PTO, company holidays, and floating holidays to support work-life balance.
Company-Wide Winter Break: Two weeks of company closure each winter to disconnect and recharge.
Paid Parental & Family Leave: Paid leave to support you and your family through life's important moments.
Professional Development: Annual learning and development allowance to support your professional growth.
Wellness Benefits: Wellness and work-from-home stipends to support your physical and mental well-being.
Sabbatical Program: Four weeks of paid sabbatical leave after four years of service.
Flexible Work: Flexible schedules and a hybrid work model for our office-based teams.
In-Office Meals: Complimentary meals at our office hubs.

Benefits may vary by location, team, and role.

At Lightning AI, we are committed to fostering an inclusive and diverse workplace. We believe that diverse teams drive innovation and create better products. We provide equal employment opportunities to all employees and applicants without regard to race, color, religion, gender, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other protected characteristic. We are dedicated to building a culture where everyone can thrive and contribute to their fullest potential.