Staff Software Engineer, Agent Infrastructure and Reliability

## 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 set the architecture and reliability bar for the infrastructure that runs every CharacterQuilt agent.

This is not a narrow platform role. You'll own the system from Postgres and the filesystem through workers, sandboxes, authenticated browsers, and the product state customers see. ## What you'll own - Worker and sandbox orchestration that stays correct through crashes, retries, and timeouts. - Durable execution, idempotency, recovery, and observability for consequential agent actions. - Browser profiles, credentials, tenant isolation, and authenticated session reliability. - The API, CLI, and MCP surfaces around our agent runtime. - A simpler system and a higher engineering bar as the team grows. ## You might be a fit if - You've owned production distributed systems, developer infrastructure, or browser automation. - You can debug across application code, databases, queues, networks, and filesystems. - You want staff-level scope without staff-level distance from the work.

Five days a week in Union Square. $250K to $350K base plus 0.5% to 3% equity. We do not sponsor US visas.