Roles · Performance Testing Engineer · Principal

What a Principal } should know

41 core skills, 56 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.

41core skills
15additional 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 · 6

Defines performance engineering strategy: algorithms for efficient test data generation, statistical analysis of results (percentile calculations, trend detection). Designs capacity modeling.

Designs async test execution: distributed load generation, streaming results collection, real-time analysis pipeline. Defines concurrency models for test infrastructure.

Defines quality strategy for the performance testing platform: test script maintainability, framework evolution, regression detection accuracy. Establishes metrics.

Designs data models for the performance platform: time-series storage for results, statistical structures for analysis, streaming data for real-time monitoring.

Designs high-concurrency test infrastructure: distributed load generators, lock-free metrics collection, efficient resource utilization. Defines test infrastructure scalability.

Designs performance testing framework: plugin architecture for protocol support, strategy pattern for load profiles, extensible reporting. Defines architecture decisions.

Backend Development · 1

Designs performance testing platform: reporting API, results aggregation, automated analysis. Defines tech stack for custom performance tools.

Database Management · 3

Designs indexing performance strategy: automated index optimization, ML-based index recommendations, cross-service indexing governance.

PostgreSQL Expert

Designs database performance strategy: automated regression detection, capacity modeling, cross-database benchmarking. Defines DB performance SLA framework.

Designs query performance optimization strategy: ML-based query analysis, automated tuning recommendations, cross-service query performance governance.

API & Integration · 2

API Testing Expert

Designs performance testing tooling platform: unified test framework, custom tool development, vendor evaluation strategy. Defines tool governance.

Designs API performance platform: automated performance regression, continuous performance monitoring in production, capacity forecasting. Defines organizational API performance strategy.

Cloud & Infrastructure · 3

AWS Expert

Designs cloud performance testing strategy: multi-cloud load generation, global performance testing, cloud cost governance. Defines cloud-native performance platform.

Docker Expert

Designs container strategy for the performance platform: scalable test infrastructure, ephemeral test environments, cost-optimized container orchestration.

Designs K8s performance testing platform: multi-cluster test execution, self-service test environments, automated capacity planning.

DevOps & CI/CD · 1

Designs CI/CD performance strategy: automated performance governance, release performance requirements, continuous performance monitoring.

Testing & QA · 6

Designs performance resilience testing: chaos engineering integrated with load testing, automated degradation detection, resilience SLO framework.

E2E Testing Expert

Designs E2E performance assurance: continuous performance monitoring, synthetic transactions, real-user performance metrics.

Load Testing Expert

Designs load testing platform: automated capacity prediction, production traffic replay, ML-based anomaly detection. Defines organizational load testing strategy.

Designs test data platform: automated production-scale data generation, compliance-aware provisioning, cross-environment data governance.

Designs performance testing environment strategy: on-demand provisioning, cost optimization, production-parity validation.

Designs holistic performance testing strategy: multi-level testing framework, risk-based prioritization, continuous performance assurance.

AI-Assisted Development · 1

Defines AI strategy for performance engineering: ML-based capacity prediction, automated bottleneck detection, AI-assisted optimization recommendations.

Observability & Monitoring · 6

APM Tools Expert

Designs APM platform for performance engineering: unified application monitoring, automated performance analysis, capacity prediction. Defines tool evaluation criteria.

Designs performance metrics strategy: organization-wide instrumentation standards, automated baseline calculation, ML-based anomaly detection.

ELK Stack Expert

Designs performance logging strategy: unified performance event format, ML-based log analysis, automated root cause detection.

OpenTelemetry Expert

Designs performance tracing platform: automated service dependency analysis, trace-based optimization recommendations, continuous performance monitoring.

Designs performance observability platform: unified metrics for testing and production, automated analysis, capacity forecasting. Defines metrics strategy.

Shapes performance observability strategy: unified timing data format, cross-service performance correlation, automated degradation detection.

Version Control & Collaboration · 2

Code Review Expert

Defines review standards: cross-team review for shared test infrastructure, architecture review for test platform changes.

Git Advanced Expert

Defines version control strategy for performance engineering: monorepo vs polyrepo for test projects, release management for test frameworks.

Performance Engineering · 10

Designs benchmarking platform: automated continuous benchmarking, cross-version comparison, hardware-aware benchmarks. Defines benchmarking methodology.

CPU Profiling Expert

Designs profiling platform: fleet-wide continuous profiling, automated hotspot detection, cost-performance correlation. Defines profiling strategy.

Designs database performance strategy: automated DB performance regression, multi-DB benchmarking, capacity forecasting. Defines DB performance governance.

Designs I/O performance strategy: storage performance optimization, network performance architecture, I/O-aware capacity planning.

Designs latency optimization strategy: global latency architecture, edge computing, predictive optimization. Defines organizational latency culture.

Designs memory optimization strategy: GC tuning guidelines, memory-efficient architecture patterns, automated memory regression detection.

Defines Network Profiling strategy at organizational level. Shapes enterprise approaches. Mentors leads and architects.

Designs organizational performance budget strategy: business-aligned budgets, cost-performance trade-offs, automated governance. Defines performance culture.

Defines Resource Optimization FinOps strategy at organizational level. Shapes enterprise approaches. Mentors leads and architects.

Designs throughput optimization strategy: scalability architecture patterns, capacity prediction models, cost-efficient scaling. Defines throughput governance.

Additional skills

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

API DocumentationChatGPT / ClaudeCursor IDEDesign PatternsGraphQL DesignIntegration TestingJWT / OAuth2 / OIDCOWASP & Application SecurityPrompt Engineering for CodeRedisSecure Coding PracticesSystem Design FundamentalsTerraformType Safety & Type SystemsUnit Testing
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} in the open competency matrix: 56 skills across 5 levels. The matrix is free for individuals and stays free.