## What we're building
Enterprise marketing still runs through agencies because launching one campaign means coordinating specialists across Marketo, HubSpot, Meta, LinkedIn, CMSs, and a dozen other systems. It takes weeks.
CharacterQuilt uses computer-use agents to do that work inside the software companies already use. A campaign that took three months can now ship in two days. We raised $13M and were one of the fastest-growing companies in YC's P26 batch.
## The role
You'll own the runtime behind every agent run: workers, sandboxes, files, skills, authenticated browsers, durable state, retries, recovery, and the API and CLI around the system.
You'll work directly with me and a very small engineering team. Our agents touch customer software and real budgets, so "probably worked" is not good enough.
## What you'll do
- Provision and operate workers and sandboxes.
- Make file, skill, and workspace hydration fast and correct.
- Build reliable browser authentication and session isolation.
- Design retries, replay, cancellation, recovery, and observability.
- Ship the API, CLI, and MCP surfaces customers and our own agents use.
## You might be a fit if
- You're a strong full-stack engineer who likes databases, distributed systems, filesystems, and browsers.
- You move quickly but care deeply about correctness.
- You want broad ownership at an early-stage company.
Five days a week in Union Square. $250K to $350K base plus 0.5% to 3% equity. We do not sponsor US visas.
Visa sponsorship is not available for this role.
