Senior+ Full-Stack Engineer

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 based in Brazil . As a Senior+ Full-Stack Engineer, you will build and evolve a developer infrastructure platform that enables AI applications and agents to connect seamlessly with external APIs and services. You will take ownership of product features from initial customer discovery and technical design through implementation, deployment, and continuous improvement. Working across backend services, APIs, runtime systems, and frontend interfaces, you will help deliver reliable, scalable, and intuitive tools for developers. You will collaborate directly with customers to understand their needs and translate real-world challenges into impactful product solutions. In this highly autonomous role, you will influence technical architecture, product strategy, and the engineering roadmap. You will join a remote-first, startup environment that values ownership, pragmatic problem-solving, open-source collaboration, and a strong developer experience.