Founding Engineer
Core
Building the runtime and systems for autonomous growth marketing agents that run paid ads, manage campaigns, and drive revenue for B2B customers.
Role type
Founding Engineer (Senior IC, product-minded generalist)
Builds
Autonomous agent runtime, tool integrations, and human-agent collaboration interfaces for paid advertising workflows.
Domain
AI Agents / Growth Marketing / B2B SaaS
Deliverable
production ML models
Required skills
LLMs and agent orchestration, tool use and integration, system architecture, asynchronous systems, product judgment, end-to-end ownership
Preferred skills
TypeScript, Node, React, PostgreSQL, durable workflows, sandboxed execution, RL and fine-tuning
Technologies
LLMs, TypeScript, Node, React, PostgreSQL (via careerplan.io/jobs/4546028-founding-engineer-at-thunder)
Responsibilities
Build and improve the runtime for long-horizon, tool-using agents in sandboxed environments; Improve agent quality with continual learning, RL, fine-tuning, and evals; Design interaction patterns for human-agent collaboration; Integrate tools across advertising, CRM, and analytics; Ship end-to-end across infra, backend, and user-facing experiences; Work with founders to turn customer workflows into product capabilities.
