Fullstack Engineer, AI Agents — Build Core Systems (SF)

11x; San Francisco, Northern (CA, KY); Hybrid; USD 180,000 - 250,000; Full time

Job summary

11x in San Francisco is looking for a product-minded fullstack engineer to build core experiences powering our AI agents. You’ll work across the stack from user-facing product experiences to the systems that orchestrate and deploy autonomous agents, partnering closely with Product, Design, and AI/Engineering.

This is an in-person role based in our San Francisco office, where our team works together five days a week.

Qualifications

• 3+ years of experience in a product-oriented software engineering role.
• Strong foundation in Typescript, React, NextJS, and NodeJS.
• Experience working in fast-paced environments with rapid learning and iteration.
• Interest in research, technical writing, or contributing to knowledge-sharing within a team.
• Bonus: experience with large language models, prompt engineering, or AI infrastructure.

Responsibilities

• 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 engineering 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.

Skills

Typescript

React

NextJS

NodeJS

Fast-paced environments

Job description

11x in San Francisco is looking for a product-minded fullstack engineer to build core experiences powering our AI agents. You’ll work across the stack from user-facing product experiences to the systems that orchestrate and deploy autonomous agents, partnering closely with Product, Design, and AI/Engineering.

This is an in-person role based in our San Francisco office, where our team works together five days a week.