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About the Role
Join an early-stage AI startup as a founding engineer, building multi-modal AI agents across voice, SMS, and email. You will own a core product domain end-to-end, making product decisions directly with customers. The company has achieved seven figures in ARR within its first several months, and this role offers significant growth potential.
Responsibilities
- Own an entire product domain from architecture through daily production feature shipping.
- Join customer calls, synthesize feedback, and drive product decisions independently.
- Build and optimize multi-modal agents targeting sub-500ms voice latency, high SMS response rates, and persistent conversation state across channels.
- Define the architecture and quality bar for non-deterministic systems, including evals, prompt versioning, guardrails, and drift detection.
- Work full-stack across React/Next.js frontends, Node.js backends, and Python voice services.
Requirements
- 3 to 8 years of full-stack engineering experience with a track record of shipping 0-to-1 products at high-growth startups, as a founder, or in new vertical teams at large tech companies.
- Strong proficiency in TypeScript with production experience using Node.js, React, and Next.js.
- Hands-on production experience with LLM APIs or agent SDKs such as Anthropic, OpenAI, Vercel AI SDK, or similar frameworks.
- Depth in at least one of: production voice or SMS agents, long-running agent state and memory, B2B2C or marketplace product architecture, or agent evals and guardrails.
- Proven ability to conduct customer discovery calls and make product decisions without a dedicated PM.
- Comfort operating without structure, defining processes from scratch, and sustaining high intensity during launches.
Skills
- TypeScript
- Node.js
- React
- Next.js
- LLM APIs
- Agent SDKs
- Python
- Voice pipelines
- SMS agents
- Agent evals
- Guardrails
- Customer discovery
- Product decision making
Location
- New York City, New York, USA
Work Type
- On-site
Experience Level
- 3 to 8 years
Salary/Compensations
- $180,000 to $250,000 USD annually
Benefits
- Equity is available
About the Company
- Early-stage AI startup in the sports and sales automation space.
- Building multi-modal AI agents across voice, SMS, and email.
- Achieved seven figures of ARR within its first several months.