About Blacksmith

• We started by building infrastructure to run CI workloads really fast. Our first product helps companies run GitHub Actions substantially faster and cheaper by owning and operating our own global fleet of bare-metal machines rather than renting generic cloud VMs.
• Today, we orchestrate tens of millions of Firecracker VMs each week, running CI for 10,000+ companies and tens of millions in ARR. We’ve grown 20x so far in 2026.
• We operate thousands of bare-metal machines across multiple regions, regularly schedule 300k+ vCPUs concurrently, and run a petabyte-scale Ceph cluster that we manage ourselves.
• We’ve raised $125M from Seed to Series C, led by Sequoia, Google Ventures (GV) & Peak XV Partners, and we’re intentionally building a small, but exceptional team.
• Blacksmith was founded by a team with deep systems and scaling experience, including building search/ads infrastructure at Faire, and operating large distributed systems at Cockroach Labs. Our GTM is led by Jon Boyer, formerly Head of Sales at Zapier.
• We're now extending the same CI infrastructure into a broader platform: running agent sandboxes at scale and building our own background coding agent on top of it.

About the Role

Blacksmith's infrastructure footprint is growing rapidly.

Every quarter, we make decisions around servers, storage, networking, datacenter capacity, power, and geographic expansion. As demand for software validation grows, ensuring that capacity is available when and where we need it becomes increasingly important.

We're looking for someone to own this problem.

You'll work directly with the founders and infrastructure team to forecast demand, plan capacity growth, manage supplier relationships, and ensure Blacksmith can scale ahead of customer demand.

Your job is simple to describe but difficult to execute: Make sure Blacksmith never runs out of capacity.

What You'll Do

• Own capacity planning across compute, storage, networking, and datacenter infrastructure.
• Build forecasting models for infrastructure demand and growth.
• Partner with engineering to understand future workload requirements.
• Develop deployment plans across regions and datacenter partners.
• Manage relationships with hardware vendors, datacenter providers, and infrastructure suppliers.