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Blacksmith
New York City
Source: Blacksmith careers · View original posting
From Blacksmith's posting. “We” and “our” refer to the employer.
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 7,000+ companies and tens of millions in ARR. We’ve grown 10x so far in 2026.
We operate thousands of bare-metal machines across multiple regions, regularly schedule 100k+ vCPUs concurrently, and run a petabyte-scale Ceph cluster that we manage ourselves.
We’ve raised $58.5M from Seed to Series B, led by 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.
Blacksmith is building the fastest cloud for code: the infra layer where software gets run, tested, and fixed. As AI makes code generation cheaper, the bottleneck is shifting from writing code to running it quickly, at scale. Every agent workflow needs a fast, isolated place to run.
We are hiring a General Manager to build Blacksmith’s Sandboxes business.
You will own the business end-to-end: product strategy, customer development, go-to-market, pricing, partnerships, adoption, revenue, unit economics, and team-building.
This is a zero-to-one role. You will work directly with Blacksmith’s founders and engineering team to make Blacksmith the default execution platform for AI agents and software work.
The role should feel like building a new infrastructure company, except you will start with Blacksmith’s compute and storage fleet, execution stack, customers, capital, and distribution.
Compensation
Medical, Vision, and Dental insurance.
Competitive base + equity.
Unlimited PTO.
Annual offsite.
Early-exercise stock options
12 weeks fully paid parental leave (US)
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