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.

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:

• 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, authentication and authorization enforcement, rate limiting, versioning, and tenant isolation - without becoming a bottleneck for the teams shipping behind it.

• Build the notification and eventing backbone that keeps customers informed about the state of their infrastructure, with delivery guarantees and preference controls they can trust.

• Evolve the quota and entitlement system into a first-class product surface: self-serve quota requests, transparent limits, and enforcement that is both fast and correct under contention.

• Reduce time-to-first-GPU for new customers by hardening and automating onboarding, provisioning, and identity flows.

• Extend the resource management layer so new infrastructure offerings can be modeled, exposed, and reconciled without bespoke one-off plumbing each time.

• Collaborate with cross-functional teams, like product and design, to evaluate tools, frameworks, and customer needs, creating innovative solutions that differentiate Crusoe Cloud.

• Contribute to architectural decisions that support reliability and maintainability across the company.

• Mentor engineers, enhance hiring practices, and contribute to building a strong, inclusive engineering culture.

At Crusoe, we are redefining cloud infrastructure by integrating data center operations with seamless user experiences. From developing turn-key AI cloud infrastructure to managing advanced data center operations, Crusoe is at the forefront of innovation in AI-first cloud computing. Join us to help shape a platform that reduces carbon emissions while delivering best-in-class cloud services.

• Customer-Centric Mindset: A passion for creating intuitive, high-quality solutions that directly impact customer success and satisfaction. Any experience building out infrastructure tooling is a plus.

• Professional Experience: 3+ years of software development experience, including programming with modern compiled languages such as Go, Rust, Java, or C++. Our services are primarily written in Go.

• API and Service Design: Experience designing versioned public APIs (gRPC/protobuf, REST) and the SDK, CLI, or Terraform provider surfaces built on top of them, with an eye toward backward compatibility.

• Gateway and Edge Concerns: A clear sense of what belongs at the API edge versus in a backing service - request routing, authn/authz enforcement, rate limiting and throttling, quota checks, input validation, and graceful degradation under load.

• Cloud Expertise: Proven ability to design and scale fault-tolerant distributed systems and develop managed cloud services.

• Data and State Management: Strong relational database skills (PostgreSQL), including schema design, transactions, isolation levels, locking, and safe online migrations for correctness-critical data such as quotas and entitlements.

• Event-Driven Systems: Practical experience with message queues and streaming systems (Kafka, NATS, Pub/Sub, or similar) and the patterns that make them reliable - at-least-once delivery, idempotent consumers, retries, backoff, and dead-letter handling. Directly relevant to notifications and resource lifecycle events.

• Asynchronous Workflows: Comfort building long-running, resumable workflows and reconciliation loops - state machines, control loops, or workflow engines such as Temporal - for provisioning, onboarding, and resource lifecycle management.

• Technical Proficiency: Strong fundamentals in data structures, algorithms, microservices, and infrastructure tools like Docker, Kubernetes, Terraform, and CI/CD systems.

• Observability and Reliability: Experience defining SLOs, instrumenting services with metrics, logs, and traces, and using that signal to debug production issues in systems you are on-call for.

• Collaboration Skills: Ability to work with cross-functional teams to align priorities and deliver customer-first solutions.

• Mentorship Abilities: Experience guiding engineers, improving hiring and onboarding processes, and driving team growth.

• Communication Skills: Exceptional ability to articulate complex ideas and align technical solutions with customer needs.

• Direct experience building or scaling a public cloud console or developer platform.

• Familiarity with the unique requirements of AI/ML workloads and their impact on cloud resource management.

• Experience with financial or billing systems at scale (usage-based billing, credits, etc.).

• Prior experience in a high-growth startup environment or a "Neocloud" infrastructure provider.

• Contributions to open-source projects related to cloud-native infrastructure or developer experience.