Staff Fullstack Engineer, AI Agents at 11x.ai (San Francisco, CA)Staff Fullstack Engineer, AI Agents

We’re looking for a Staff Software Engineer with deep fullstack expertise and a passion for building ambitious AI-powered systems. In this role, you’ll operate as a technical lead—driving architecture, product development, and internal standards for one of our flagship autonomous digital workers. You’ll collaborate closely with our CTO, cross-functional teams, and model providers to translate complex ideas into elegant, production-ready software. This is a hands-on leadership role where you’ll influence system design, mentor other engineers, and set the bar for engineering quality in a fast-moving, AI-native environment.

• Architect, build, and scale fullstack systems that support autonomous AI agents in production.
• Lead technical decision-making across projects—ensuring long-term scalability, reliability, and developer efficiency.
• Evaluate new technologies, model APIs, and prompting strategies to enhance agent performance and alignment.
• Collaborate cross-functionally with design, product, and GTM teams to define roadmaps and prioritize development.
• Drive internal engineering standards through mentorship, documentation, and code reviews.

• 6+ years of experience in software engineering, with demonstrated leadership on complex technical projects.
• Strong command of modern fullstack frameworks—especially Typescript, React, NextJS, and NodeJS.
• Track record of shipping scalable systems in high-growth or startup environments.
• Strategic thinker who can balance speed and quality while driving technical vision.
• Bonus: experience with LLMs, agent orchestration frameworks, or AI infrastructure.

Base salary range: $150,000 – $250,000 *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.