Infrastructure Software Engineer, Core Platform

Lumbra is building Nebula, an agentic harness running as a set of microservices on managed Kubernetes, backed by managed databases, caching, and workflow orchestration, all provisioned with OpenTofu and deployed with Helm via CI/CD. We currently run on GCP but are not wed to any single provider. We're looking for an infrastructure engineer to own the reliability, scalability, and developer experience of the harness across dev, demo, and production environments.

Author and maintain Infrastructure as Code (OpenTofu/Terraform) modules for cloud resources including networking, managed Kubernetes clusters, databases, caching, and container registries. Strong IaC skills and experience with GCP (or equivalent) are essential.

Design and manage Kubernetes cluster configurations including node pool autoscaling, workload identity, private connectivity for database access, and network policies. You need deep Kubernetes knowledge, not just manifest authoring.

Build and optimize Helm charts for a shared service template consumed by multiple services, managing environment-specific overrides across dev, demo, staging, and production. Experience with Helm inheritance patterns and chart libraries is important.

Own the CI/CD pipeline architecture : multi-stage builds, conditional triggers based on file-change detection, and deployment orchestration. You should be comfortable authoring and debugging complex pipeline configurations.

Implement and maintain the observability stack (metrics, traces, logs) across all services using Grafana, Prometheus, and OpenTelemetry. Experience instrumenting distributed systems and building actionable dashboards is needed.