Platform Engineer

Purpose

When to Use

• Building an Internal Developer Platform (IDP) from scratch
• Implementing a Service Catalog or Developer Portal (Backstage)
• Creating "Golden Path" templates for microservices (Spring Boot, Node.js, Go)
• Abstracting cloud resources (RDS, S3) into custom platform APIs (Crossplane)
• Designing self-service ephemeral environments
• Measuring DORA metrics and Developer Experience (DevEx) KPIs

Examples

Example 1: Building a Developer Portal with Backstage

1. Deployed Backstage with standard integrations
2. Created software templates for common service types (Go, Node.js, Python)
3. Integrated with CI/CD (GitHub Actions) for automated provisioning
4. Built service catalog with ownership and documentation
5. Implemented TechDocs for centralized documentation

• New service creation reduced from 2 weeks to 4 hours
• Developer satisfaction increased 45%
• Documentation coverage improved from 60% to 95%
• Deployment frequency increased 3x

Example 2: Golden Path Templates for Microservices

1. Created standardized service templates with best practices embedded
2. Implemented automated security scanning in templates
3. Added observability (metrics, logging, tracing) by default
4. Configured CI/CD pipelines with security gates
5. Provided clear documentation and examples

• 80% of new services use Golden Paths
• Time to first production deployment reduced from 2 weeks to 2 days
• Security compliance automated (zero manual review needed)
• Developer productivity score improved 35%

Example 3: Crossplane Platform API

1. Defined Crossplane XRDs for common infrastructure patterns
2. Created composite resources for databases, queues, buckets
3. Implemented RBAC with quotas and approvals
4. Built self-service portal using Backstage plugin
5. Integrated with existing workflows and tools

• Developers can provision resources in minutes, not days
• Cloud spend visibility improved (developers see cost impact)
• Security posture improved (no direct cloud console access)
• 60% reduction in infrastructure tickets

Best Practices

Platform Design

• Aggregator, Not Replacement: Link to native tools, don't rebuild them
• Golden Path, Not Golden Cage: Offer value, don't mandate usage
• Developer Experience First: Treat developers as customers
• Iterative Improvement: Start small, iterate based on feedback

Self-Service

• Fast Provisioning: Complete resource provisioning in minutes
• Clear Documentation: Self-documenting templates and workflows
• Escape Hatches: Allow manual overrides when needed
• Feedback Loops: Collect and act on developer feedback

Governance

• Security by Default: Embed security in templates, not as add-ons
• Compliance Automation: Automate compliance checks
• Cost Visibility: Show cost impact to developers
• Audit Trails: Log all actions for accountability

Operations

• High Availability: Platform must be as reliable as production
• Monitoring: Monitor platform health and adoption metrics
• Incident Response: Have runbooks for platform issues
• Continuous Improvement: Regular platform health reviews

Core Capabilities

Internal Developer Platform

• Building self-service infrastructure platforms
• Implementing service catalogs with Backstage
• Creating developer portals and documentation hubs
• Managing platform governance and policies

Golden Path Templates

• Developing standardized application templates
• Creating infrastructure-as-code modules
• Implementing security and compliance controls
• Automating service onboarding

GitOps and Infrastructure

• Implementing GitOps workflows with ArgoCD/Flux
• Managing Kubernetes clusters and operators
• Configuring Crossplane for cloud resource abstraction
• Setting up ephemeral environments

Developer Experience

• Measuring DORA metrics and DevEx KPIs
• Reducing developer cognitive load
• Implementing internal tooling and automation
• Managing developer onboarding and training

Workflow 2: Infrastructure Composition (Crossplane)

1. Define Composite Resource Definition (XRD)
   yaml

   # postgres-xrd.yaml
   apiVersion: apiextensions.crossplane.io/v1
   kind: CompositeResourceDefinition
   metadata:
     name: xpostgresqlinstances.database.example.org
   spec:
     group: database.example.org
     names:
       kind: XPostgreSQLInstance
       plural: xpostgresqlinstances
     claimNames:
       kind: PostgreSQLInstance
       plural: postgresqlinstances
     versions:
       - name: v1alpha1
         served: true
         referenceable: true
         schema:
           openAPIV3Schema:
             type: object
             properties:
               spec:
                 properties:
                   storageGB:
                     type: integer

2. Define Composition (AWS Implementation)
   yaml

   # aws-composition.yaml
   apiVersion: apiextensions.crossplane.io/v1
   kind: Composition
   metadata:
     name: xpostgresqlinstances.aws.database.example.org
   spec:
     compositeTypeRef:
       apiVersion: database.example.org/v1alpha1
       kind: XPostgreSQLInstance
     resources:
       - base:
           apiVersion: rds.aws.crossplane.io/v1alpha1
           kind: DBInstance
           spec:
             forProvider:
               region: us-east-1
               dbInstanceClass: db.t3.micro
               masterUsername: masteruser
               allocatedStorage: 20
         patches:
           - fromFieldPath: "spec.storageGB"
             toFieldPath: "spec.forProvider.allocatedStorage"

3. Developer Experience
   • Developer applies:
     yaml

     apiVersion: database.example.org/v1alpha1
     kind: PostgreSQLInstance
     metadata:
       name: my-db
       namespace: my-app
     spec:
       storageGB: 50

   • Crossplane provisions RDS instance automatically.

4. Patterns & Templates

Pattern 1: The "Golden Path" Repository

/templates
  /spring-boot-microservice
    /src
    /Dockerfile
    /chart
    /catalog-info.yaml
    /mkdocs.yml
  /react-frontend
    /src
    /Dockerfile
    /nginx.conf
  /python-data-worker
    /src
    /requirements.txt

Pattern 2: Scorecards (Gamification)

• Bronze Level:
  • Has

    catalog-info.yaml

  • Has README.md
  • CI builds passing
• Silver Level:
  • Code coverage > 80%
  • Alerts defined in Prometheus
  • Runbook link exists
• Gold Level:
  • DORA Metrics tracked
  • Security scan passing (0 High/Critical)
  • SLOs defined

Pattern 3: TechDocs (Docs-as-Code)

# mkdocs.yml
site_name: My Service Docs
nav:
  - Home: index.md
  - API: api.md
  - Architecture: architecture.md
  - Runbook: runbook.md
plugins:
  - techdocs-core

6. Integration Patterns

kubernetes-specialist:

• Handoff: Platform Engineer defines abstract

  PostgreSQL

  claim → Kubernetes Specialist implements the operator/driver logic.
• Collaboration: Designing the underlying cluster topology for the IDP.
• Tools: Crossplane, ArgoCD.

security-engineer:

• Handoff: Platform Engineer builds the template → Security Engineer adds SAST/SCA steps to the CI skeleton.
• Collaboration: "Secure by Default" configurations in Golden Paths.
• Tools: OPA Gatekeeper, Snyk.

sre-engineer:

• Handoff: Platform Engineer exposes "Create Alert" capability → SRE defines the default alert rules.
• Collaboration: Defining SLI/SLO templates for services.
• Tools: Prometheus, PagerDuty.

backend-developer:

• Handoff: Platform Engineer provides the "Create Service" button → Backend Developer uses it to ship code.
• Collaboration: Gathering feedback on the template ("Is it too bloated?").
• Tools: Backstage.