11X Ai

Senior Fullstack Software Engineer, AI Agents

Seattle, USA · Senior

Sponsorship not specified$180k-$225kDetected 203 days ago

TypeScriptReactNext.jsFull-Stack DevelopmentNLPLLMsAgentic AIAI OrchestrationA/B TestingResearchLeadershipWriting

About the role

We're looking for a fullstack engineer with a passion for applied research and cross-functional collaboration.
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.

Design, build, and iterate on fullstack systems that power AI agents from concept to deployment.
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.
In this role, you'll work closely with engineering leadership and our AI partners to prototype, build, and scale the next generation of autonomous digital workers.

Ideal Candidates Have 6+ years of experience in a product-oriented software engineering role.
experience with large language models, prompt engineering, or AI infrastructure.

CAD $180,000 - $225,000 Seattle base
USD $180,000 - $250,000 *Final offer will be based on a variety of factors, including role level, relevant experience, skills, and job-related expertise.

Experience working in fast-paced environments with a track record of rapid learning and iteration.
Bonus: experience with large language models, prompt engineering, or AI infrastructure.
This is an immersive opportunity to deepen your expertise in large language model applications, system design, and human-AI interaction-while learning how fast-moving AI companies operate from the inside.

Participate in peer reviews, brainstorming sessions, and technical deep dives with our global team.

This listing is sourced directly from 11X Ai's careers page and normalized into a canonical job model.