Staff Software Engineer, Agent Infrastructure and Reliability

CharacterQuilt is hiring a Staff Software Engineer, Agent Infrastructure and Reliability in New York, NY. Full brief — comp band, interview process, and hiring team — available to Employbl members.

Location: New York, NY
Company size: 2–10
Posted: 3d ago
Via: Yc

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02Seniority & experience requirementsLocked
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Staff Software Engineer, Agent Infrastructure and Reliability · CharacterQuilt

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Job title: Staff Software Engineer, Agent Infrastructure and Reliability
Job location: New York, NY, US
Job listing URL: https://www.ycombinator.com/companies/characterquilt/jobs/yCogh5G-staff-software-engineer-agent-infrastructure-and-reliability
Job description: ## 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.

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Where this role is based

New York, NY

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CharacterQuilt headquarters

Matawan, NJ

Company size

2–10 employees

Founded

2024

Total raised

$2,000,000

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Funding rounds

Seed$2MJun 10, 2025