AI-Driven Product Engineer

River; New York (NY); On-site; USD 120,000 - 190,000; Full time

Job summary

River in New York City is hiring an IC to work directly with the founders, shipping production-ready software and LLM-powered workflows. You will see your work used in live sales calls within the same week you build it, taking ownership without waiting for a spec.

You’ll build backend services, data pipelines, LLM prompts, and UI components (Next.js/React), collaborating with design partners to generalize wins into the product.

Qualifications

• 2.5–5 years of experience as an IC. You've shipped real software that real people used.
• CS degree from a strong university, or equivalent exceptional experience at top-tier companies.
• You've built something real with LLM APIs, not just tutorials.

Responsibilities

• Build the backend services and APIs behind live calls: session state, integrations, data pipelines.
• Build the LLM-powered workflows: prompts, tool use, and the flows the agent follows during a live demo.
• Build the enrichment pipeline that tells the agent who it's talking to before the call starts.
• Partner with design partners on custom solutions, then generalize the wins back into the product.
• Ship UI where it's needed (Next.js, React), watch real calls, and iterate fast.

Skills

LLM APIs experience

Ownership

Product sense

Ship real software

Backend development

Education

CS degree from a strong university

Equivalent exceptional experience

Tools

Next.js

React

Job description

River in New York City is hiring an IC to work directly with the founders, shipping production-ready software and LLM-powered workflows. You will see your work used in live sales calls within the same week you build it, taking ownership without waiting for a spec.

You’ll build backend services, data pipelines, LLM prompts, and UI components (Next.js/React), collaborating with design partners to generalize wins into the product.