Senior Software Engineer - Dev Platform

This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Senior Software Engineer – Dev Platform based in Brazil. We are seeking an experienced software engineer to help build and scale an internal developer platform that enables engineering teams to integrate and use AI models efficiently, securely, and reliably. In this role, you will contribute to the development of a company-wide AI Gateway, providing unified access to leading large language model (LLM) providers. You will design APIs, SDKs, and self-service tools that simplify adoption while ensuring strong governance, observability, and cost control. Working across engineering, security, and site reliability teams, you will own features from initial design through production deployment. This is an opportunity to shape the infrastructure behind AI-powered development in a remote, international engineering environment.