---
title: 'Voice Agent Engineer (Full stack) at 11x.ai'
canonical: 'https://feeny.ai/job/voice-agent-engineer-full-stack-11x-ai-san-francisco-awzdwnfm5sk5'
type: 'job'
last_seen: '2026-09-11'
---

# Voice Agent Engineer (Full stack) at 11x.ai

- **Company:** 11x.ai
- **Location:** San Francisco, CA
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2025-09-05
- **Last confirmed live:** 2026-09-11
- **Apply:** https://jobs.gem.com/11x-ai/am9icG9zdDrJI0bueYK2gE2IarYNkHrG

## Job description

## About the Role

As a Voice Agent Engineer, you’ll be the connective tissue between our GTM AI agents and real-world customer outcomes. AI is redefining the way people sell - and the Voice team is on the front lines of making that happen.

Location is flexible—we’re hiring in San Francisco (in-office) and remotely throughout the U.S. and Canada.

## What You’ll Do

- Design, build, and iterate on fullstack systems that power AI agents from concept to deployment
- Research and evaluate new approaches to agent orchestration, prompting strategies, and model alignment
- Collaborate with product, design, and GTM teams to improve UX and usability for non-technical users
- Share learnings, document findings, and contribute to the evolution of internal best practices
- Participate in peer reviews, brainstorming sessions, and technical deep dives with our global team

Ideal Candidates Have

- 3+ years of experience in a product-oriented software engineering role
- A CS/Engineering degree & professional experience; bonus if you’ve worked in a startup, consulting, or customer-facing technical role before
- Strong programming fundamentals in Typescript, React, NextJS, and NodeJS
- Familiarity with APIs, data flows, and debugging live systems
- Interest in AI/ML, conversational AI, or voice technologies
- Responsive and proactive in addressing customer needs with bias for action - comfortable shipping quickly and improving continuously in live deployments

Base salary range: $180,000 – $200,000 *Final offer will be based on a variety of factors, including role level, relevant experience, skills, and job-related expertise.

11x is an equal opportunity employer and does not discriminate on the basis of race, gender, sexual orientation, gender identity/expression, national origin, disability, age, genetic information, veteran status, marital status, pregnancy or related condition, or any other basis protected by law.

## About 11x.ai

## Company Overview
- **One-liner**: 11x.ai builds autonomous AI "digital workers" — such as AI SDR Alice and AI phone agent Julian — that automate outbound revenue and go-to-market workflows for sales, marketing, and growth teams.
- **Entity Type**: Private (Series B)
- **Headquarters**: San Francisco, California, United States
- **Founded**: 2023
- **Founders**: Not publicly available

## Core Business
- **Primary industries**: AI / Automation / Sales Technology (GTM)
- **Target customers**: B2B, high-growth startups to large enterprises (e.g., Xerox, UST, Gupshup, Sage, Checkr, Rho)
- **Mission/purpose**: To elevate human work by deploying digital workers that handle essential but mundane revenue tasks, enabling companies to "scale faster and smarter" while freeing people for higher-impact work.

## Products & Services
- **Alice – AI SDR**: Autonomous outbound sales development representative that filters signals across 50+ data sources, enriches prospect data, personalizes messaging, and runs multi-channel sequences across email, phone, social, and SMS to book qualified meetings.
- **Julian – AI Phone Agent**: A voice AI agent that runs natural-language sales and customer conversations, listens, handles objections, adapts mid-call, and works around the clock across multilingual use cases.
- **Autonomous Digital Workers Platform**: A unified, enterprise-ready platform that covers the full pipeline from prospecting to closed-won, integrating with existing tools and continuously learning from every interaction.

## Market Standing
- **Valuation/Market Cap**: Not disclosed
- **Key Metric**: Total funding of **$96M** (including a $50M Series B led by Andreessen Horowitz) and annual revenue reported at **$24.5M**
- **Notable Investors/Partners**: Andreessen Horowitz (a16z), Benchmark, Project A Ventures; customers include Xerox, UST, Gupshup, Sage, Checkr, and Rho
- **Growth Signals**:
  - ~63 employees spread across 13 countries (US, UK, India, Canada, Germany, and more)
  - 24/7 operations with multilingual capabilities
  - Active hiring across engineering, design, growth, sales, and voice-agent roles (13+ current openings)

## Competitive Advantages
- **Fully autonomous AI agents** that execute complex sales workflows without supervision, not just assistive tools
- **Continuous learning** from each interaction, improving performance over time
- **Deep integrations** and multi-channel orchestration across email, phone, social, and SMS
- **Enterprise-grade security**: SOC-2 compliant, end-to-end encryption
- Strong backing from top-tier VCs with an early revenue base ($24.5M ARR) — rare for a Series B AI startup

## Strategic Focus
- Expanding its digital workforce beyond sales development to cover more GTM functions
- Scaling deployments globally (US and UK presence with global remote team)
- Deepening enterprise adoption and building out the "full-pipeline" platform
- Hiring product engineers, full-stack engineers, data engineers, and voice-agent specialists to accelerate product development

## Why Work Here
- **Culture**: Fast-moving, mission-driven AI startup focused on reinventing how GTM teams work with autonomous digital workers
- **Remote/hybrid**: Flexible — some roles are remote (e.g., Senior Fullstack Engineer, AI Agents) while others are San Francisco-based; headquarters at 677 Harrison Street, SF
- **Compensation indicators**: Posted ranges include $170,000–$200,000 for Data Engineer and $150,000–$250,000 for Product Engineer
- **Backing and scale**: Work with a well-capitalized startup (a16z, Benchmark) in one of the hottest AI-agent categories, with a distributed team across 13 countries

## Sources
1. [11x.ai](https://www.11x.ai/)
2. [11x.ai - About Us](https://www.11x.ai/about-us)
3. [LinkedIn - 11x](https://linkedin.com/company/11x-ai)
4. [a16z Jobs - Careers at 11x](https://jobs.a16z.com/jobs/11x.ai)
5. [Gem - 11x.ai Careers](https://jobs.gem.com/11x-ai)

## Other roles at 11x.ai

- [Data Engineer](https://feeny.ai/job/data-engineer-11x-ai-san-francisco-vwjrrxnk0g5c) — San Francisco, CA
- [Growth Engineer](https://feeny.ai/job/growth-engineer-11x-ai-san-francisco-ah5vt2sqx9wy) — San Francisco, CA
- [Senior Fullstack Software Engineer, AI Agents](https://feeny.ai/job/senior-fullstack-software-engineer-ai-agents-11x-ai-seattle-9zfsnb912svx) — Seattle, WA
- [Senior Fullstack Software Engineer, AI Agents - Remote](https://feeny.ai/job/senior-fullstack-software-engineer-ai-agents-remote-11x-ai-pn8zrj9m9dp6)
- [Account Executive](https://feeny.ai/job/account-executive-11x-ai-san-francisco-ykxdj14rqtrq) — San Francisco, CA
- [Account Executive (London)](https://feeny.ai/job/account-executive-london-11x-ai-london-79tp6x1xkpnc) — London, United Kingdom
- [Senior Customer Success Manager](https://feeny.ai/job/senior-customer-success-manager-11x-ai-san-francisco-ppk7nn7ev2e5) — San Francisco, CA
- [Staff Fullstack Engineer, AI Agents](https://feeny.ai/job/staff-fullstack-engineer-ai-agents-11x-ai-san-francisco-0ezsmzq52ydr) — San Francisco, CA
- [Fullstack Software Engineer, AI Agents](https://feeny.ai/job/fullstack-software-engineer-ai-agents-11x-ai-san-francisco-eazkvnzy87am) — San Francisco, CA