You will build River’s core product across the stack, focusing on the backend services powering live AI voice calls and browser-automation demos. Working directly with founders, you’ll ship LLM workflows and enrichment pipelines that allow AI agents to qualify and close deals in real-time, seeing your code live in sales calls within days.
Product Engineer at River
River is building the future of B2B sales with "Liv," an AI voice agent that doesn't just talk—she demos products by controlling a browser in real-time. If you have 1-3+ years of experience and want to ship features that run in live sales calls the same week you build them, join us in defining a new category of AI-driven commerce.
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Location
New York, United States
Compensation
Not Disclosed
Company
River
Role overview
AI Sales
River deploys AI voice sales agents in B2B companies. Backed by the founders of Ramp and Kalshi.
What you will do
- Develop backend services and APIs using Node.js and TypeScript to manage live call sessions, state, and complex data integrations.
- Build and refine LLM-powered workflows and prompts that guide the AI agent through live product demos and objection handling.
- Engineer the browser-automation agent that navigates complex UIs in real-time while the voice agent interacts with prospective buyers.
Who this is a fit for
- Has 1–3+ years of experience shipping real-world software, with deep proficiency in TypeScript, Node.js, and modern React environments.
- Demonstrates hands-on experience building applications with LLMs and possesses a strong product sense for how AI interactions should feel.
- Brings a background in voice, video, or real-time infrastructure, specifically from a company specializing in voice or video AI applications.
Why this role is remarkable
- Ship to production and watch your work drive real-time sales calls the same week, offering immediate feedback loops and high impact.
- Work directly with founders at a $2M pre-seed company backed by top-tier operators from Ramp, Kalshi, and JumpCloud.
- Define a new category by building “Liv,” an AI agent that goes beyond chat to actually control browsers and demo products autonomously.
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
Meet Jack
What happens next?
Jack’s an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack’s network.
If your profile’s a match and River wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.