Senior Full-Stack Engineer (Backend Leaning)

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Full-Stack Engineer (Backend Leaning) based in the United States. We are seeking an experienced full-stack engineer with strong backend expertise to build and scale the core products that power modern procurement and sourcing operations. You will develop critical workflows, supplier bidding and award capabilities, and integrations connecting enterprise procurement platforms and ERP systems. Working closely with product managers, designers, frontend engineers, and QA, you will own features from domain modeling and APIs through production delivery. The role offers exposure to evolving product areas, requiring adaptability, technical judgment, and the ability to quickly understand complex business domains. You will also use AI coding agents as part of your daily workflow while maintaining high standards for architecture, code quality, and reliability. This is an opportunity to influence engineering practices, mentor peers, and help shape how AI transforms software development in a growing technology environment.