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11x · San Francisco, CA

Staff Fullstack Engineer, AI Agents

directorfull time$150,000 – $250,000 / yearPosted yesterday
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Stack mentioned

agentic-aitypescriptreactnext.jsnode.jsllmsystem-design

About The Role

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.

What You’ll Do

- 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.

What We’re Looking For

- 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.

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