Roles · QA Security Engineer · Principal

What a Principal } should know

40 core skills, 55 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, API & Integration, Cloud & Infrastructure.

40core skills
15additional skills
9skill 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 · 4

Designs performance strategy for security infrastructure: optimal algorithms for SAST/DAST analysis of large codebases, efficient fuzzing. Balances thoroughness and scanning speed.

Defines quality strategy for the security testing platform: reliability metrics for scanners, false positive rates, SLA for vulnerability detection. Shapes culture of security quality.

Designs security test data architecture: vulnerability databases, attack pattern libraries, structured threat models. Defines strategy for storing and processing security findings.

Designs security testing platform architecture: plugin ecosystem, shared vulnerability models, integration layer for SAST/DAST/SCA. Defines extensibility strategy.

API & Integration · 2

API Testing Expert

Designs API security tooling platform: integrated testing pipeline, custom scanner development, vulnerability correlation across tools. Defines tool evaluation and adoption strategy.

Designs API security testing platform: automated API discovery, continuous security testing, API threat modeling. Defines organizational API security standards.

Cloud & Infrastructure · 2

Designs supply chain security: end-to-end container verification (Sigstore/cosign), SLSA compliance, automated attestation. Defines organizational supply chain governance.

Docker Expert

Designs container security strategy: supply chain security, SBOM generation, runtime protection framework. Defines organizational container security governance.

DevOps & CI/CD · 1

Designs security DevSecOps strategy: unified security pipeline, automated compliance, security-as-code. Defines organizational shift-left security framework.

Testing & QA · 10

E2E Testing Expert

Designs E2E security assurance: continuous security verification in production, synthetic security monitoring, real-user security metrics.

Designs security integration testing platform: automated cross-service security verification, compliance testing, infrastructure security validation.

Load Testing Expert

Designs security resilience testing: advanced DoS scenarios, distributed attack simulation, security control performance optimization.

Designs generative security testing: AI-assisted fuzzing, automated property discovery, model-based security verification. Defines organizational adoption strategy.

Designs organizational security testing strategy: continuous security assurance, automated compliance verification, security testing center of excellence.

TDD & BDD Expert

Designs security-by-design methodology: threat-model-driven BDD, automated compliance verification, security requirement traceability. Defines security testing culture.

Designs secure test data platform: automated data masking, compliance-aware test data generation, cross-environment data governance.

Designs security testing environment strategy: on-demand provisioning, production-like security configs, compliance environment requirements.

Designs holistic security testing strategy: integrated testing layers, risk-based prioritization, continuous assurance. Defines organizational security testing maturity model.

Unit Testing Expert

Defines unit-level security testing strategy: automated verification of security controls, coverage metrics, integration with secure SDLC. Shapes developer security testing culture.

Security · 14

Designs cloud security assurance: continuous compliance platform, multi-cloud security governance, automated remediation. Defines organizational cloud security strategy.

Designs supply chain security platform: comprehensive SCA, SBOM management, automated license compliance, dependency governance. Defines organizational supply chain risk management.

Designs GDPR compliance testing strategy: automated data mapping verification, consent mechanism testing, right-to-deletion validation, data breach detection. Defines privacy-by-design testing framework.

Designs organizational security IR capability: SOC integration, threat intelligence-driven response, automated remediation. Defines security incident management maturity model.

Designs identity security testing strategy: continuous auth monitoring, zero-trust identity verification, federated identity security. Defines organizational auth security framework.

Designs K8s security strategy: zero-trust in K8s, service mesh security, platform security controls. Defines organizational container orchestration security framework.

Designs network security strategy: zero-trust networking validation, micro-segmentation testing, global network security assessment. Defines organizational network security framework.

Designs security testing methodology based on OWASP: organizational ASVS target levels, custom testing guides, industry-specific security requirements. Defines security assurance framework.

PCI DSS Expert

Designs PCI-DSS compliance testing: automated requirement verification, quarterly scanning program, penetration testing scope. Defines continuous compliance monitoring strategy.

Designs authorization security strategy: continuous authorization verification, zero-trust access validation, dynamic policy testing. Defines organizational access control testing framework.

SAST/DAST Expert

Designs application security testing platform: integrated SAST/DAST/IAST/SCA, automated triage, vulnerability correlation. Defines organizational AppSec testing strategy.

Designs secure development strategy: secure-by-default frameworks, automated security verification, developer security enablement. Defines organizational secure SDLC.

Designs organizational threat modeling: automated threat discovery, threat intelligence integration, continuous threat assessment. Defines risk-based security strategy.

Designs organizational vulnerability management: unified vulnerability platform, risk-based prioritization, automated remediation. Defines vulnerability governance and continuous improvement.

AI-Assisted Development · 1

Defines AI strategy for security testing: LLMs for vulnerability analysis, AI-assisted code review, automated threat modeling. Shapes governance for AI in security operations.

Observability & Monitoring · 3

ELK Stack Expert

Designs security observability platform: SIEM integration, threat detection pipeline, automated investigation. Defines organizational security monitoring strategy.

Designs security metrics platform: unified security dashboards, executive reporting, risk quantification. Defines organizational security measurement strategy.

Designs security logging strategy: unified security event format, real-time threat detection, compliance evidence. Defines organizational security audit logging framework.

Version Control & Collaboration · 3

Code Review Expert

Defines organizational security review standards: mandatory security review criteria, architectural security review board, automated security analysis integration.

Designs security knowledge management: organizational security wiki, automated policy distribution, compliance evidence management. Defines documentation governance.

Git Advanced Expert

Defines version control security strategy: secrets management, code signing, supply chain integrity. Defines organizational Git security governance.

Additional skills

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

API DocumentationAsync ProgrammingAWSChatGPT / ClaudeCursor IDEDesign PatternsGraphQL DesignKubernetes CoreMultithreadingNetwork FundamentalsOpenTelemetryPostgreSQLPrompt Engineering for CodeRedisSystem Design Fundamentals
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} in the open competency matrix: 55 skills across 5 levels. The matrix is free for individuals and stays free.