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 Software Engineer based in the United States. This is an opportunity to build and evolve modern, cloud-native applications across the full technology stack. You will own features end-to-end, from accessible React interfaces to scalable Node.js services and GraphQL APIs. The role combines hands-on engineering with meaningful contributions to architecture, testing, security, and platform reliability. You will work in an AI-native development environment where coding agents support implementation, testing, and review. Senior engineers are expected to orchestrate these tools thoughtfully while maintaining rigorous standards for quality and security. You will collaborate closely with product, design, QA, and engineering teams in a product-led, highly collaborative environment. The role offers significant technical ownership and the opportunity to shape both the platform and the way modern software is built.