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River (rivergtm.com)
Location: NYC, on-site
Role: Founding Engineer + Product Engineer
Type: Full-time
Source: Hacker News
About River
River builds voice AI agents for B2B companies. Our agent talks with prospects in real time, answers hard questions, and demos the product by actually controlling a browser while it speaks. Every call runs on a sub-second loop: speech, a rendered avatar, several LLMs, and a live browser-use agent, in front of real buyers.
We are $2M pre-seed backed by founders of Ramp, Kalshi, and JumpCloud.
Open Roles
Founding Engineer (5+ years experience)
- Focus: Own the live-call pipeline (real-time voice, avatar, browser streaming) and the infrastructure behind it.
- Requirements: Strong backend/infra experience plus real-time experience (WebRTC, voice/video, websockets).
- Stack: TypeScript, Node, Next.js, Postgres, Redis, LiveKit.
Product Engineer (1-3 years experience or exceptional projects)
- Focus: Build the services behind live calls, LLM workflows, and the browser-use agent that runs demos.
- Requirements: Backend-leaning, TypeScript.
Additional Information
- Work Environment: Both roles are on-site in NYC, working directly with the founders.
- Try the Product: rivergtm.com/start
How to Apply
Email the co-founder/CEO: tarek@rivergtm.com