Platform Engineer – Developer Experience (DevEx)

About the Position

Join Alcor's Platform Engineering team as a Developer Experience (DevEx) Platform Engineer, focusing on optimizing build, package, and deploy paths for product engineering teams.

Responsibilities

Reporting to the Platform Engineering Manager, you will join Ledger's Platform Engineering team as a Platform Engineer with a Developer Experience (DevEx) focus. Your primary responsibilities will include:

• CI/CD Platform & Runner Fleet

  • Own and evolve the self-hosted GitHub Actions runner fleet, including Linux runners managed via Actions Runner Controller (ARC), self-hosted macOS runners, and the Terraform modules that provision and scale self-hosted infrastructure.
  • Right-size runner classes (CPU/memory/storage) against real workload profiles, balancing cost efficiency against engineering velocity.
  • Support the migration away from GitHub-hosted runners, including evaluating trade-offs between containerized and VM-based execution for workloads with special hardware requirements.
  • Investigate and resolve macOS virtualization performance issues and help evaluate alternative approaches.

• Artifact & Package Management

  • Administer the JFrog Platform (Artifactory, Xray, Curation) as the organization's primary artifact repository.
  • Provide light-touch support for GitHub Container Registry (GHCR) and GitHub Packages.
  • Operate and maintain ChartMuseum as the organization's Helm chart repository.
  • Define and enforce container image ownership boundaries and drive Dockerfile build and layer optimization best practices.

• Progressive Delivery & Infrastructure Automation

  • Operate two ArgoCD / Argo Rollouts environments for GitOps-based, progressive delivery patterns.
  • Author, maintain, and support Helm charts and Kustomize overlays as the standard configuration management approach for Kubernetes workloads.
  • Design, review, and evolve Terraform and Terragrunt modules for infrastructure-as-code.

• Observability & Reliability

  • Improve and unify the observability stack; Grafana, Prometheus, and Alertmanager.
  • Work across Datadog and VictoriaLogs/VictoriaMetrics to reduce tool sprawl and help define a coherent strategy for metrics, logs, and events.
  • Provide platform-level telemetry that gives engineering teams and leadership a single, trustworthy view of pipeline and platform performance.

• Internal Developer Platform, Policy & Modern Workloads

  • Evaluate and help operate Crossplane as a control-plane layer for self-service, Kubernetes-native infrastructure provisioning.
  • Contribute to a developer portal / internal catalog strategy so engineers have a single place to discover services, ownership, docs, and golden-path templates.
  • Implement and maintain policy-as-code guardrails using Kyverno and/or Open Policy Agent (OPA) across the Kubernetes and CI/CD estate.
  • Support Knative-based serverless/event-driven workloads on Kubernetes.
  • Roll out OpenTelemetry instrumentation and pipelines to standardize traces, metrics, and logs across services.

• Developer Experience & Enablement

  • Act as the platform's embedded point of contact for one or more product engineering teams.
  • Build self-service tooling, templates, and documentation so engineers can provision runners, publish artifacts, and deploy without needing deep platform expertise.
  • Contribute to the platform roadmap, bringing a developer-experience lens to prioritization.

Requirements

Experience & Technical Skills

• 5+ years in a Platform Engineering, DevOps, SRE, or infrastructure engineering role, ideally supporting product engineering teams directly.
• Hands-on experience with GitHub Actions, including self-hosted runner architectures and provisioning them via Terraform.
• Practical knowledge of the JFrog Platform for artifact management and dependency security.
• Familiarity with container registries and Helm chart repositories such as ChartMuseum on object storage (S3).
• Experience with GitOps continuous delivery using ArgoCD, and ideally Argo Rollouts for progressive delivery.
• Strong Kubernetes configuration management skills with Helm and Kustomize.
• Solid Infrastructure-as-Code experience with Terraform and Terragrunt.
• Experience with Crossplane for building self-service infrastructure APIs.
• Experience building or operating an internal developer portal / software catalog.
• Hands-on experience with policy-as-code enforcement in Kubernetes using Kyverno and/or Open Policy Agent (OPA / Gatekeeper).
• Familiarity with Knative or similar Kubernetes-native serverless/eventing frameworks.
• Experience building, hardening, and optimizing container images.
• Working knowledge of an observability stack - Grafana, Prometheus, and Alertmanager - plus exposure to Datadog and/or VictoriaLogs/VictoriaMetrics, and practical experience instrumenting services and pipelines with OpenTelemetry.
• Comfortable in Linux/Unix environments, with solid scripting ability (e.g. Bash, Python, or Go) and strong Git fundamentals.
• AWS cloud experience is a plus.

Soft Skills

• Genuine product mindset toward internal platforms.
• Strong cross-functional collaborator.
• Clear written and verbal communicator.
• Pragmatic and cost-conscious.
• Ownership mindset with strong personal accountability.
• Curious and continuously improving.
• Comfortable with ambiguity and evolving priorities.
• Empathetic and collaborative when defining ownership boundaries.

Nice to Have

• Experience supporting mobile/device-testing CI in a self-hosted runner context.
• Experience with developing platform API and CLI for developers to consume blueprints and patterns.
• Experience operating in a large monorepo, including build-graph/dependency-aware CI triggering.
• Prior experience defining or operating SLOs/SLAs and error budgets for internal platform services.

We Offer

• Competitive salary
• Opportunity to work in a dynamic and innovative environment
• Collaborative and inclusive team culture
• Professional development opportunities

About the Company

At Alcor, we are committed to building a diverse and inclusive workplace where everyone feels valued and empowered to contribute their unique perspectives. We believe in fostering a culture of continuous learning and growth, where our employees are encouraged to innovate and push the boundaries of what is possible.