Engineering

Voice AI Engineer

Make the agent sound human and answer in under a second. Own the real-time voice pipeline: telephony, speech, the model orchestration and the evals that keep it honest.

Los Angeles · In office, five days a week · Full-time · Above market + meaningful equity

About Loop

Loop Voice builds AI voice agents for ecommerce brands.

The agent calls shoppers to recover abandoned carts, upsell, win customers back and handle inbound support.

We have placed 100,000+ calls for 200+ merchants and hold 5.0 stars on the Shopify App Store.

The role

Make the agent sound human and answer in under a second. Own the real-time voice pipeline: telephony, speech, the model orchestration and the evals that keep it honest.

What you'll do

Own latency and conversation quality end to end: telephony, STT, LLM orchestration and TTS.
Build the eval and self-improvement loop that trains agents on real conversations.
Listen to hundreds of real calls and turn what you hear into fixes.
Design guardrails and compliance logic for consent, quiet hours and DNC.
Measure pickup rate, conversation length and recovered revenue and move them.

What we're looking for

You have built real-time or streaming systems and cared about every millisecond.
Hands-on with LLM tooling, prompt and eval pipelines.
Python or TypeScript.
You are obsessive about how a conversation actually sounds.

Nice to have

Twilio, Telnyx or Vapi.
Audio DSP.
Sales or support experience.

What you get

Above-market pay

We benchmark to the top of the market and pay above it. We would rather overpay the right person than underpay three.

Meaningful equity

Real ownership in a company built to win, not a token option grant.

Full medical coverage

Full medical coverage from day one.

Unlimited PTO

We measure output, not hours at a desk. Take the time you need to come back sharp.

Fully in office, Los Angeles

One office, one team, five days a week. Everything you need to do your best work is in the room.

Relocation and whatever else it takes

Relocation to Los Angeles covered. Then whatever else you need: the gear, the tools, the learning. We do whatever is needed to get the best people here and keep them.

We hire for Intelligence, Competitiveness and Extreme Ownership

Intelligence: You learn faster than the problem changes.

Competitiveness: You keep score and you hate losing more than you like winning.

Extreme Ownership: There is no 'not my job' here.

See how we assess these traits

YOUR MOVE

Apply

Apply for Voice AI Engineer. We read every application ourselves.