Roles · DevOps Engineer · Principal

What a Principal } should know

44 core skills, 61 in total. Expectations per skill, and what changes at the next level.

This page lists what a Principal } is expected to know and do, skill by skill. Core skills are the ones a manager and peers assess in a review cycle; the rest count only in self-assessment. Main areas: Programming Fundamentals, Backend Development, Database Management.

44core skills
17additional skills
11skill areas
100%at Advanced or Expert
Assess myself as Principal Full role matrix

Core skills for a Principal

Grouped by area. The label on the right is the expected depth: Awareness, Working, Advanced or Expert.

Programming Fundamentals · 5

Defines architectural standards for algorithmic efficiency across the entire DevOps platform. Develops frameworks for evaluating computational complexity of CI/CD pipelines, optimizes systems processing millions of monitoring events. Mentors team in applying algorithmic thinking to infrastructure tasks.

Develops event-driven DevOps platform architecture with asynchronous processing of thousands of events per second. Designs reactive scaling systems, non-blocking incident processing pipelines. Defines concurrency and fault tolerance standards for all automations.

Defines organizational infrastructure code quality standards: IaC testing policies, code coverage metrics for automations, documentation standards. Creates platform tools for automated quality checking and compliance for all DevOps artifacts.

Develops platform solutions based on complex data structures: DAGs for pipeline orchestration, B-trees for artifact indexing, bloom filters for event deduplication. Defines infrastructure data modeling standards at organizational level.

Defines architectural patterns for all organizational DevOps tooling. Develops OOP-based frameworks for unifying automation approaches: abstract cloud providers, pipeline factories, deployment strategies. Mentors architects in applying SOLID to IaC.

Backend Development · 3

Apache Kafka Expert

Defines organizational event-driven architecture strategy based on Kafka. Designs real-time platform for processing millions of infrastructure events: configuration changes, alerts, deployment metrics. Ensures exactly-once semantics for critical operations.

Defines internal Developer Platform strategy based on Python frameworks. Develops Internal Developer Portal architecture integrating CI/CD, monitoring and infrastructure into a unified self-service interface. Establishes API-first approach standards for DevOps tooling.

Redis Expert

Defines distributed caching architecture for the entire infrastructure platform. Designs multi-regional Redis solutions for GitOps state storage, cross-cluster deployment coordination. Establishes data fault tolerance and consistency standards.

Database Management · 1

PostgreSQL Expert

Develops organizational database management architecture: multi-regional PostgreSQL clusters, automated DR with RPO/RTO guarantees, DBaaS platform with full lifecycle management. Defines standards for all database systems in infrastructure.

API & Integration · 1

Develops organizational API platform strategy: unified interface for all infrastructure operations, integration standards between clouds and tools. Defines Internal Developer Platform architecture with API-first approach and full automation.

Cloud & Infrastructure · 12

Ansible Expert

Shapes the organization's configuration management and automation strategy with Ansible at its core. Drives innovation in Ansible automation patterns including event-driven automation, GitOps-integrated playbook delivery, and infrastructure testing frameworks. Influences the Ansible community through collection development, upstream contributions, and thought leadership on enterprise-scale configuration management practices.

AWS Expert

Develops multi-cloud strategy with AWS focus: architecture for 1000+ services, enterprise-grade security and compliance, FinOps culture. Defines cloud center of excellence, AWS partnership, migration strategy and legacy system modernization.

Develops global edge strategy: multi-CDN with intelligent failover, edge computing platform, architecture for serving millions of users. Defines content and API delivery standards for all organizational products.

Develops corporate container infrastructure security architecture: supply chain security (SLSA Level 3+), zero-trust container runtime, compliance automation. Defines roadmap and standards for all organizational containerization technologies.

Docker Expert

Develops organizational containerization platform strategy: build standards for all technologies, supply chain security (SBOM, Sigstore, SLSA), OCI registry integration. Defines container-as-a-service architecture for developers with full self-service.

Helm Expert

Develops platform Kubernetes application packaging strategy: choosing between Helm, Kustomize and Carvel, standards for 100+ services. Defines self-service deployment architecture with golden paths, automated validation and policy enforcement.

Develops organizational container orchestration strategy: multi-cloud Kubernetes clusters, service mesh architecture, platform engineering vision. Defines platform evolution from Kubernetes to Internal Developer Platform, mentors platform engineering teams.

Develops Kubernetes-as-a-platform strategy for the entire organization: workload management standards, developer abstractions, container infrastructure maturity model. Defines architectural decisions for scaling to thousands of pods and hundreds of services.

Develops global traffic management architecture: intelligent load balancing with ML, multi-cloud traffic management, standards for thousands of services. Defines routing platform with automatic failover, canary routing and A/B testing at infrastructure level.

Develops corporate network architecture: multi-regional connectivity, SD-WAN, global DNS strategy, zero-trust network access. Defines standards for all network components in infrastructure, service mesh and cloud networking integration.

Terraform Expert

Develops Infrastructure as Code strategy for the entire organization: multi-cloud modular architecture, Terraform + Pulumi + CDK for different use cases. Defines self-service infrastructure platform with ready-made module catalog and automated compliance.

Develops corporate network access strategy: zero-trust architecture, SASE model, identity provider integration. Defines architecture for secure access to thousands of services from anywhere, standards for all organizational units.

DevOps & CI/CD · 7

ArgoCD Expert

Shapes enterprise-wide GitOps architecture with ArgoCD as the cornerstone of continuous delivery strategy. Drives innovation in ArgoCD extensibility through custom resource actions, config management plugins, and integration with service mesh control planes. Influences ArgoCD project roadmap and contributes to CNCF GitOps working group standards.

Develops zero-downtime deployment strategy for all infrastructure: standards for each service type (stateless, stateful, data pipeline). Defines deployment platform architecture with SLO-driven automatic strategy selection and rollback.

Develops automated progressive delivery architecture: ML-driven canary analysis, automatic deployment strategy selection, chaos engineering integration. Defines safe deployment standards for organizations with thousands of deployments per day.

Feature Flags Expert

Develops organizational progressive delivery strategy: unified feature management platform, experimentation standards (A/B, multivariate). Defines architecture for safe deployment of any changes with automatic rollback on metric degradation.

Develops organizational CI/CD platform strategy: choosing between GitHub Actions, GitLab CI and Jenkins for different use cases. Defines unified pipeline platform architecture, quality and security standards for all 100+ repositories and teams.

Develops DevOps platform strategy based on GitLab: end-to-end from SCM to production, Security integration, Package Registry, Infrastructure. Defines enterprise GitLab instance architecture with HA, geo-replication and DR plan.

Jenkins Expert

Defines migration strategy from Jenkins to modern CI/CD platforms (GitHub Actions, GitLab CI, Tekton). Designs transition plan for organizations with hundreds of Jenkins jobs, ensures backward compatibility. Manages legacy Jenkins infrastructure during migration.

Security · 2

Develops corporate DevOps security architecture: zero-trust model for infrastructure, automated compliance (SOC2, PCI DSS, HIPAA), risk management platform. Defines security roadmap and mentors teams in secure development culture.

Develops corporate secrets and certificate management platform: multi-regional Vault with automated failover, PKI infrastructure, HSM integration. Defines data encryption policies and compliance requirements for all infrastructure.

AI-Assisted Development · 1

Develops AI-augmented DevOps strategy for the organization: tool selection (Copilot, Cursor, Amazon Q), integration with internal knowledge bases. Defines AI-assisted operations architecture: auto-remediation, intelligent alerting, predictive scaling.

Architecture & System Design · 2

Develops corporate business continuity and disaster recovery strategy: multi-cloud DR, automated failover for the entire platform. Defines resilience engineering architecture: chaos engineering culture, gameday framework, continuous DR validation.

Develops architectural strategy for the entire infrastructure platform: patterns for scaling to millions of users, reliability engineering standards. Defines technology radar, architectural principles and governance for all engineering teams.

Observability & Monitoring · 7

Develops metrics-driven operations strategy: ML-powered anomaly detection on custom metrics, predictive scaling, business observability. Defines unified metrics platform architecture for correlating infrastructure, application and business metrics.

ELK Stack Expert

Develops observability platform architecture based on Elastic Stack: petabyte-scale log storage, real-time analysis, ML-powered anomaly detection. Defines organizational logging standards, migration strategy to OpenSearch or alternatives.

Develops corporate incident management culture: SRE principles, toil budgets, 80% incident automation. Defines AIOps platform architecture: ML-powered alert correlation, automated remediation, predictive incident prevention.

OpenTelemetry Expert

Develops corporate observability strategy on OpenTelemetry: unified observability platform, standards for all languages and frameworks. Defines full-stack observability architecture: from infrastructure to business metrics with automatic correlation.

Develops organizational metrics platform architecture: multi-cluster Prometheus with Thanos/Cortex, scaling to millions of time series. Defines observability strategy: unified metrics, logs, traces with correlation and ML-driven insights.

Develops reliability engineering strategy based on SLO: corporate reliability standards, SLO-driven development, automated error budget management. Defines platform reliability architecture: from SLO definition to automatic scaling and DR.

Develops unified logging strategy: standards for all platforms and languages, OpenTelemetry-based logging pipeline. Defines log-driven operations architecture: automatic anomaly detection, predictive analysis, auto-remediation based on logs.

Version Control & Collaboration · 3

Code Review Expert

Develops quality assurance strategy for infrastructure code: automated policy enforcement (OPA, Sentinel), continuous compliance. Defines organizational review standards: risk-based review depth, AI-assisted review, IaC quality metrics.

Develops knowledge management strategy for engineering organization: Internal Developer Portal (Backstage/Port), automated documentation, living docs. Defines knowledge platform architecture: from auto-generation to AI-powered search and recommendations.

Git Advanced Expert

Develops organizational source control strategy: platform selection (GitHub/GitLab), monorepo vs polyrepo architecture, InnerSource practices. Defines code governance model: licensing, security scanning, automated compliance for the entire organization.

Additional skills

Not assessed by the team, but part of the self-assessment and the development plan.

API DocumentationChaos EngineeringChatGPT / ClaudeDatabase IndexingDesign PatternsE2E TestingGitOps PracticesGraphQL DesignIntegration TestingJWT / OAuth2 / OIDCMemory ManagementMultithreadingQuery OptimizationSecure Coding PracticesType Safety & Type SystemsUnit TestingWebSocket API Design
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} in the open competency matrix: 61 skills across 5 levels. The matrix is free for individuals and stays free.