Senior Backend Software Engineer - Core Backend, Cloud Customer Experience

Crusoe is on a mission to accelerate the abundance of energy and intelligence . As the only vertically integrated AI infrastructure company built from the ground up, we own and operate each layer of the stack — from electrons to tokens — to power the world's most ambitious AI workloads. When you join Crusoe, you join a team that is building the future, faster. We're in the midst of the greatest industrial revolution of our time. The demand for AI compute is boundless, and power is a bottleneck. We're solving that — with an energy-first approach that makes AI infrastructure better for the world and faster for the people innovating with AI. We're looking for problem-solving, opportunity-finding teammates with a sense of urgency, who believe in the scale of our ambition and thrive on a path not fully paved — people who want to grow their careers alongside a team of experts across energy, manufacturing, data center construction, and cloud services. If you want to do the most meaningful work of your career, help our customers and partners advance their AI strategies, and be part of a high-performing team that believes in each other, come build with us at Crusoe. About This Role: We are seeking a Senior Backend Software Engineer to join the Core Backend team within Cloud Customer Experience (CCX). The CCX organization is at the forefront of delivering a best-in-class user experience for our AI-focused cloud platform, and Core Backend is the engine underneath it. Our mission is to provide an intuitive, seamless user flow while ensuring the backend reliability and scalability that set us apart from the competition. The Core Backend team owns the foundational services behind every interaction a customer has with Crusoe Cloud. Concretely, the team builds and operates: API Gateway: the front door to Crusoe Cloud. Every request to create, read, or manage a cloud resource flows through the gateway this team owns. That means request routing, authentication and authorization enforcement, rate limiting and throttling, API versioning, and the tracing that makes a single call debuggable end to end. Resource Management Layer : the abstraction between customer intent and physical infrastructure. Resource models and lifecycle state machines, reconciliation loops that drive declared state toward reality, capacity and placement coordination, and one consistent API surface behind every client. Quota Management : the system of record for what every organization and project is entitled to consume. Our team built and owns the quota model for all Crusoe products and its enforcement path, along with the request and approval workflows that gate GPU, compute, storage, and networking capacity - a low-latency, strongly consistent, correctness-critical service sitting directly in the path of every resource creation. Notifications : the platform-wide notification and eventing system that tells customers what is happening to their infrastructure - quota changes, capacity events, maintenance windows, billing thresholds, security alerts - across email, in-console, and webhook delivery. Event pipelines, templating, fan-out, delivery guarantees, deduplication, and per-user preference management at scale. User Onboarding Flows : the path from sign-up to first successful workload. Identity and organization provisioning, invitations and role assignment, verification checks, and the self-serve flows that let a new customer go from account creation to running GPUs without a human in the loop. Your work will focus on making these systems fast, reliable, and coherent - one gateway, one resource model, one entitlement story, one notification surface - as Crusoe Cloud's customer base and hardware footprint grow. What You’ll Be Working On: Design, develop, and maintain scalable and reliable services that power our cloud platform's user-facing experiences. Own and evolve the API gateway that fronts all Crusoe Cloud resource management traffic - routing,