Platform Engineer

About the Role We're a fast-moving AI/ML platform startup building infrastructure for reinforcement learning environments, post-training data pipelines, and large-scale agent evaluation. Our engineering team of ~15 includes exceptional technical talent — competition medalists, serial AI startup founders, and published researchers. As a Platform Engineer, you'll own the reliability, scale, performance, and developer experience of our core infrastructure and systems. This is a backend-architecture-heavy role with real production ownership — your work directly shapes how fast, reliable, and cost-effective our platform is to build on and run. What You'll Do Own production uptime, latency, provisioning speed, infrastructure cost, and incident response for core platform services. Build and maintain AWS infrastructure using Terraform, Kubernetes/EKS, Helm, Docker, EC2, CodeBuild, ECR, S3, IAM, networking, and secrets management. Design and improve backend and platform systems for scale — including capacity planning, autoscaling, queueing, backpressure, cleanup jobs, retries, and rollback paths. Define and improve dashboards, alerts, logs, traces, SLOs, runbooks, and on-call workflows so failures are detected, debugged, and resolved quickly. Build reliable CI/CD pipelines, release automation, environment management, and deployment workflows that improve developer productivity and reduce production risk. Write clean, maintainable code to automate systems, improve backend services, and create internal tooling. What We're Looking For Required 2–4 years of experience owning production cloud infrastructure for a high-availability, user-facing platform, with responsibility for uptime, performance, deployment safety, and cost. Deep hands-on experience with AWS and containerized systems; strong familiarity with Terraform, Kubernetes/EKS, Docker, EC2, CodeBuild, ECR, S3, IAM, networking, and secrets management. Proven track record building or operating CI/CD, release automation, observability, alerting, and incident response systems. Strong backend engineering judgment — ability to reason about service architecture, APIs, databases, async systems, queues, scaling limits, and production failure modes. Ability to write clean, maintainable code and apply software engineering judgment across infrastructure, backend systems, and developer workflows. High ownership mindset; comfortable being accountable for production systems end-to-end. Nice to Have Experience designing systems for bursty workloads, long-running jobs, sandboxed execution, distributed workers, or high-concurrency services. Background operating infrastructure for data-heavy, ML/AI, workflow, marketplace, developer-tools, or enterprise platforms. Demonstrated focus on reducing cloud spend through better architecture, autoscaling, workload placement, caching, cleanup systems, or observability. Location This role supports a few location arrangements: San Francisco, CA (on-site) — preferred for US-based candidates. Singapore (on-site) — for Southeast Asia-based candidates. Fully remote (independent contractor) — open to candidates elsewhere, particularly in Europe. Visa sponsorship is available. Compensation & Benefits Salary: $150,000 – $250,000 USD annually (full-time, US-based). Equity participation in an early-stage, well-funded AI startup. Work alongside a world-class technical team on infrastructure that operates at real scale. High degree of autonomy and direct impact on product and platform direction.