Fullstack Software Engineer, AI Agents

About the Job

Why 11x Now: At 11x, we're developing autonomous digital workers to manage repetitive tasks, allowing humans to focus on innovation and relationship building. We're one of the fastest-growing AI companies globally. We've increased our ARR by 20x and secured over $75M from leading investors, including a16z and Benchmark. Our team works in-person in our San Francisco office.

About The Role: We are seeking a fullstack engineer with a passion for research and collaborative work. You will work closely with engineering leadership and AI partners to prototype, build, and scale the next generation of autonomous digital workers. This role provides an immersive experience to deepen your expertise in large language model applications, system design, and human-AI interaction. You'll gain hands-on exposure to the latest model capabilities, contribute to internal experimentation, and help translate cutting-edge ideas into real-world tools.

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 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.

Ideal Candidates Have:

• 3+ years of experience in a product-oriented software engineering role.
• A strong foundation in Typescript, React, NextJS, and NodeJS.
• Experience working in fast-paced environments with a track record of 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.

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.

11x is an AI and Automation company based in San Francisco, CA, that specializes in building autonomous digital workers. We empower businesses to streamline operations and free human employees from routine tasks, allowing them to focus on innovation and relationship building. 11x is a fast-growing AI company, experiencing rapid expansion and attracting investment from leading firms.