Infrastructure Platform Engineer

About Massed Compute Massed Compute is building a modern GPU cloud platform for AI and high-performance compute workloads. Customers choose us when they need high-performance infrastructure with more flexibility, visibility, and support than they get from traditional options. Our work sits at the intersection of AI infrastructure, product design, systems thinking, and customer obsession. About the role We run a multi-tenant GPU cloud: physical servers in several data centers, a virtualization layer on top of them, and the APIs customers use to rent capacity. This role covers both halves — you'll work in a hypervisor and a switch config one day and in a backend service and a SQL query the next. Work is ticket-driven and AI-assisted. We expect engineers to use agentic coding tools as a normal part of the job, and to write clearly enough that the next person can follow the reasoning. Customer-reported problems land here too, so some of the work is direct: reproduce it, fix it, tell the customer what happened. What you'll do Run and maintain Proxmox clusters across multiple sites — nodes, networking, hardware faults Build and maintain APIs and MCPs, including the public customer-facing surface Keep the control plane and the actual infrastructure in agreement; automate away recurring issues Investigate and resolve customer-reported issues, and communicate the resolution back Fix multi-tenancy, security, and billing correctness issues as they surface Work tickets end to end: diagnose, fix, verify, write it up Evaluate vendors and architecture options, and document the decision What you need API development and maintenance SQL — querying, schema work, and reasoning about transactions and concurrency Strong Linux and networking fundamentals Backend development in at least one server-side language Hands-on experience using agentic coding tools — Claude Code, Cursor, Codex, or similar — as part of your normal workflow Practical experience using MCP servers, and a working understanding of how they fit into an agentic workflow Customer-facing troubleshooting — you can work a problem with the person who reported it and explain the outcome without jargon Comfort with a ticket-driven workflow and clear written communication 3+ years in infrastructure, platform, or SRE-adjacent engineering Nice to have Proxmox (or comparable virtualization) administration, including its API Building MCP servers Experience in Node.js/JavaScript and Python GPU infrastructure: NVIDIA drivers, device passthrough, hugepages, firmware Data center hands-on work: cabling, switch configuration, procurement Billing or metering systems Object storage and FUSE performance work OAuth 2.0, OpenTelemetry On-call and incident command experience How we'll know you're succeeding Recurring alert classes shrink instead of holding steady Infrastructure changes land cleanly, without customer-visible impact Provisioning, teardown, and billing paths tell the truth about what they did Fewer surprises reach customers before they reach us Equal Opportunity Massed Compute is an equal opportunity employer. We consider all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, genetic information, veteran status, or any other characteristic protected by law.