Senior Founding Full Stack Engineer (AI Voice Agents)

mission.dev • United State

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AI Summary

Build and scale AI-powered voice agent solutions for enterprise customer service as a Senior Founding Full Stack Engineer. Own end-to-end development, from architecture to production deployment, collaborating closely with founders and clients. Requires 3–8 years of full-stack expertise with React/TypeScript and backend systems in a fast-paced startup environment.

Key Highlights

Founding role shaping AI voice agent architecture and product direction for a venture-backed enterprise AI company

End-to-end ownership of core features, including real-time dashboards, analytics, and telephony integrations

High-impact engineering in a small team (under 50) with direct business impact and equity opportunity

Key Responsibilities

Design and build core AI voice agent features, including prompt orchestration and real-time analytics platforms

Develop high-performance frontend applications using React and TypeScript, and backend services/APIs for enterprise-scale customer conversations

Integrate telephony and real-time communication systems (e.g., Twilio, SIP, WebRTC) into production-ready solutions

Own the full software development lifecycle from system design to deployment, optimizing performance and state management

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Technical Skills Required

React TypeScript Full-stack software engineering

Benefits & Perks

$200,000–$280,000 annual base salary

0.25%–0.45% equity

100% employer-paid medical, dental, and vision insurance

$10,000 relocation package

Visa sponsorship for eligible candidates (H-1B, TN, L-1, E-3, O-1)

Daily meal allowance and reimbursements for gym, commuting, phone, and internet expenses

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Nice to Have

Experience with voice/telephony technologies (Twilio, SIP, WebRTC)

Building products powered by LLMs or AI agents

Early-stage startup engineering experience

Job Description

Senior Founding Full Stack Engineer | AI Voice Agents

San Francisco, CA | On-site, 5 days a week | $200K–$280K base + equity

Build the future of AI-powered customer conversations

We're partnering with a profitable, venture-backed AI company in the San Francisco Bay Area that's transforming enterprise customer service through advanced, voice-based AI agents.

With a team of fewer than 50 people, the company is building production-ready AI solutions for major U.S. enterprises. This is an opportunity to join a small, high-impact engineering team where your work directly shapes the product, architecture, and technical direction of the business.

The Opportunity

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