Software engineer II, Backend - Platform

Software engineer II, Backend - Platform Department: Engineering Team: Backend Location: Sao Paulo, Brazil Type: Full-Time **About the Role** Please note: this hybrid position is based in São Paulo, Brazil - welcoming both local professionals and those open to relocating to São Paulo. The **Login Services team** sits within **Core Security Engineering** and owns Uber’s authentication platform for both **human and non-human identities**. We build the systems that make login **seamless, secure, and resilient** for Uber’s global workforce and services, so people and workloads can confidently access internal and third-party applications using **strong authentication** with **minimal operational cost**. In this position you will be building the future of authentication at Uber—especially as **agentic workflows** and **non-human identities** become first-class citizens. You’ll drive architecture and execution across major initiatives like building a **security knowledge platform** that computes **risk levels for identities and assets** (human + NHI), and evolving next-generation authentication capabilities (e.g., stronger factors and policy enforcement across critical systems). If you’re excited about building foundational security platforms at massive scale (where reliability, security posture, and automation directly move the business) this is a rare chance to be in a space that’s getting more important every quarter. ### **What You'll Do** - Own and deliver a well-scoped slice of Uber’s authentication stack (human + non-human identities), improving security and login reliability. - Build/extend core auth services and workflows (APIs, policy checks, token/session flows) under existing architecture guidance. - Improve tier-zero SSO/login health via bug fixes, performance tuning, and availability-focused changes. - Ship production-ready code with strong fundamentals: tests, code quality, safe rollout/rollback, and clear operational docs/runbooks. - Add observability (metrics/logs/traces), dashboards, and alerts; participate in on-call and drive incident follow-ups to completion. - Implem