General Manager, Sandboxes

Blacksmith · New York, NY · Today

On-siteManagement$10/hrFull-time

About Blacksmith: We build infrastructure to run CI workloads at scale. Our first product accelerates GitHub Actions by operating a global fleet of bare-metal machines, serving 3,000+ companies, orchestrating tens of millions of Firecracker VMs monthly, and reaching ~$10M ARR in under two years. We manage thousands of bare-metal servers across multiple regions, schedule 100k+ concurrent vCPUs, and run a petabyte-scale Ceph cluster. Backed by $58.5M from Seed to Series B (led by GV and Peak XV), we’re expanding our CI infrastructure into a broader platform for agent sandboxes and background coding agents.

About the role

Blacksmith is building the fastest cloud for code—the infrastructure layer where software is run, tested, and fixed. As AI reduces the cost of code generation, the bottleneck shifts to running code quickly and at scale. Every agent workflow requires a fast, isolated execution environment. We are hiring a General Manager to build and own Blacksmith’s Sandboxes 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 where you will work directly with founders and engineering to make Blacksmith the default execution platform for AI agents and software work.

Responsibilities

Develop a clear view of the sandbox market, customers, product, and how Blacksmith wins.
Work directly with early customers building agents and other code-execution products, turning their needs into the product roadmap.
Make Blacksmith the default sandbox provider for AI startups, developer companies, and larger enterprises.
Build repeatable acquisition, onboarding, retention, and expansion motions.
Own pricing, packaging, partnerships, adoption, revenue, and unit economics.
Establish Blacksmith as the technical and commercial leader in sandbox infrastructure.
Recruit and lead a dedicated cross-functional team.

Qualifications

You may be a former founder, an early leader at a developer-infrastructure company, or someone who has built a technical product from zero to meaningful adoption.
Technically credible with engineers and technical founders.
Strong across both product and go-to-market.
Exceptionally ambitious and hungry to build something enormous, not merely launch a successful product.
Comfortable personally selling, onboarding customers, and doing unscalable work before a mature motion exists.
Highly urgent, hands-on, and effective in ambiguous environments.
Able to move between strategy, customer conversations, product decisions, and execution.
Excited to own an entire business rather than a single function.
Fluent in developer platforms, distributed systems, workload isolation, infrastructure economics, APIs, reliability, and security (though you do not need to be a systems engineer).

This role is not a fit if

You have primarily managed mature products with established product-market fit.
You want to build a large team before personally doing the work.
You are more comfortable coordinating functions than directly owning outcomes.
You need a well-defined roadmap or organizational structure to make progress.

Benefits