This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Staff Full-Stack Engineer based in the United States. The Staff Full-Stack Engineer will provide hands-on technical leadership in the development and integration of a unified platform designed to help businesses make smarter, data-driven decisions. This senior individual contributor role spans the full technology stack, from front-end architecture and user experiences to APIs, distributed systems, and cloud infrastructure. You will lead complex, cross-functional engineering initiatives, simplify existing systems, and establish scalable solutions that deliver measurable customer and business value. Working closely with Product, Design, Data Science, and Site Reliability Engineering teams, you will shape technical strategy while remaining actively involved in coding, deployment, and continuous improvement. You will also champion responsible AI adoption, strengthen engineering standards, and mentor colleagues through technical guidance and collaboration. Join a distributed, international engineering environment that values innovation, pragmatic problem-solving, and meaningful impact.