Senior Network & Site Reliability Engineer

Department: Engineering

Location: San Francisco HQ

Compensation: $210K – $240K

Employment Type: FullTime

About Us

Alembic is the pioneering Causal AI platform. We help the world's largest enterprises move past correlation to prove what actually drives business outcomes — the question marketing and growth teams have never been able to answer with confidence. Fortune 100 companies including Nvidia, Delta Air Lines, and Mars use Alembic to make multimillion-dollar decisions on trusted, causal evidence.

We're backed by a $145M Series B from WndrCo (founded by Jeffrey Katzenberg), Jensen Huang, Joe Montana, Prysm Capital, and Accenture. Our models run on our own NVIDIA DGX SuperPOD built on Grace Blackwell infrastructure — one of the fastest private supercomputers in the world. (We've melted GPUs getting here.)

About the Role

We're building infrastructure that has to perform under real-world scale, reliability, and security demands — and we're looking for an engineer who wants to own the foundation it runs on. This isn't a traditional "keep the lights on" role.

You'll design and operate the global network and reliability layer behind one of the world's fastest private supercomputers — the fabric powering distributed compute, ML workloads, real-time analytics, and mission-critical enterprise systems. You'll work across networking, systems, automation, observability, and reliability engineering to scale a platform where performance genuinely matters, with real influence over architecture decisions.

It's a strong fit if you like solving deep infrastructure problems, building resilient systems, automating everything repetitive, and owning architecture rather than just maintaining it.

What You'll Do

• Architect and operate scalable, secure network architecture for high-security requirements and large-scale machine learning workloads.

• Own network device configuration management end to end, ensuring consistency and reliability across the fleet.

• Improve system and network reliability and performance through automation, observability, and proactive capacity planning.

• Implement and manage complex network protocols and connectivity, including BGP, VPNs, and WAN circuits and external peering.

• Build and maintain comprehensive monitoring, alerting, and incident response — SLOs, runbooks, and on-call rotations — and drive post-incident analysis and continuous improvement.

• Ensure security, compliance, and operational readiness across our network and cloud infrastructure.

• Partner across engineering and data science to drive a culture of performance and reliability.

What Will Help You Succeed

• 8+ years in network or infrastructure engineering, including 5+ years in datacenter operations and/or systems and network administration.

• A strong background in network security, architecture, design, and operations.

• Extensive hands-on experience with network devices (firewalls, switches, load balancers) and large-scale architectures and protocols — BGP, QoS, MPLS, and IPsec VPNs.

• Experience designing and operating modern datacenter network fabrics (spine-leaf, EVPN/VXLAN, ECMP).

• Network automation and IaC tooling (Ansible, Terraform, Nornir, or similar), plus IPAM/DCIM platforms (NetBox, Infoblox, or similar).

• WAN engineering — carrier circuit provisioning and external network peering.

• Familiarity with Kubernetes networking (CNI plugins, ingress, service networking, network policy) and strong operational experience with Linux-based production infrastructure.

• Experience with monitoring and observability stacks (Prometheus, Grafana, Datadog, ELK, OpenTelemetry).

• Solid scripting (Python, Bash) to debug complex network and system issues and automate solutions, plus excellent cross-functional communication.

Also Helpful

• NVIDIA networking technologies — Cumulus Linux, InfiniBand, Spectrum-X, and BlueField DPUs (this is the fabric behind our SuperPOD).

• Familiarity with data-intensive platforms (Spark, Airflow, Kafka) and storage network protocols (NFS, LustreFS, iSCSI).

• Security practices for applications and infrastructure, and experience in high-compliance or SOC 2 environments.

The Role Is Right for You If

• You want to own mission-critical network and infrastructure end to end — from architecture to incident management — not just keep it running.

• You'd rather build and automate than direct from a distance, and you want meaningful influence over how a high-performance platform scales.

Why You Might Be Excited About Alembic

• Hard problems with real impact: You'll own the network and reliability layer behind systems that influence multimillion-dollar decisions at Fortune 100 companies.

• Cutting-edge technology: Operate our own NVIDIA DGX SuperPOD on Grace Blackwell — one of the fastest private supercomputers in the world — and run a fabric (InfiniBand, Spectrum-X, BlueField) almost no company has in-house.

• Technical autonomy: Ownership over architecture decisions and the freedom to solve hard infrastructure problems your way.

• Elite team: Join top engineers who thrive on hard problems and high-impact work.

• Series B momentum, real ownership: Meaningful equity at a Series B company that's raised $145M, with proven product-market fit and Fortune 100 traction.

Why You Might Not Be Excited

• If you only want to tell people what to build instead of building and automating alongside them, this isn't the environment for you.

• You prefer companies with 100% built-out process for every detail.

• You prefer static over dynamic — projects and priorities adapt as we grow. We have real paying customers and a playbook, and we still move at startup speed at Series B scale.