Cleared Software Engineer, Infrastructure at Lumbra

Own the air-gapped deployment pipeline end to end: transferring source code, charts, and configuration to disconnected environments, then building and deploying container images onsite. You need deep experience operating where nothing can be pulled from the internet.
Deploy and operate stateful infrastructure services (databases, caching, workflow orchestration, identity, object storage) on bare Kubernetes without managed cloud backends. Comfort with stateful workloads in constrained environments is a must.
Own the onsite cluster management and delivery toolchain including Rancher for Kubernetes lifecycle management, ArgoCD for GitOps-based deployments, and Harbor as the container registry. Experience operating these tools in disconnected environments is essential.
Manage the secrets lifecycle in classified environments, ensuring all credentials are generated fresh onsite with no secrets transferred on physical media. Rigorous security practices and familiarity with classified handling procedures are required.
Build and maintain OCI-compliant container build pipelines (Podman, Buildah) for environments where Docker is not available. Experience with rootless, hardened container tooling is needed.
Troubleshoot Kubernetes issues in environments with no external access : crashed pods, failed migrations, certificate errors, storage problems, all without pulling a debug image or searching the internet. Deep Kubernetes internals knowledge and self-sufficiency are essential.
Profile and optimize system performance in constrained environments : resource utilization, pod scheduling, storage I/O, and network throughput on clusters where you can't simply scale up. Every millisecond and megabyte matters when hardware is fixed and access is limited.
Author and maintain database operations tooling (migrations, backup/restore, schema management) that works reliably in disconnected environments using Kubernetes Job templates.
Write deployment procedures, runbooks, and troubleshooting guides that onsite operators can follow independently . Clear technical writing for classified operational contexts is important.

Cleared Software Engineer, Infrastructure

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