Principal Security Engineer - Cloud, AI & Secure SDLC Lead

Capco; Greater London; Hybrid; GBP 120,000 - 170,000; Full time

Benefits offered by this job

Discretionary bonus

Pension

Health insurance

Life insurance

Mental health support

Continuous learning

Cycle to work

Travel insurance

Job summary

Capco in London is seeking a Principal Security Engineer to lead the design and implementation of secure systems across cloud and on-premise platforms. You’ll embed security-by-design principles in the SDLC, collaborate with engineering and client teams, and integrate automated tooling to strengthen resilience while maintaining human review and escalation where needed.

You’ll work with cross-functional teams to champion secure development practices, lead vulnerability assessments, code reviews,

Qualifications

• Strong hands-on experience with Palo Alto, Microsoft or similar security ecosystems.
• Deep understanding of cloud security for AWS, Azure or GCP platforms.
• Proven expertise in secure coding, endpoint protection, SIEM and IAM.
• Familiarity with ISO 27001, NIST and OWASP, alongside responsible AI guardrails and human-in-the-loop controls.
• Proficiency in Python, Bash, PowerShell or Go for security automation and tool development, with Zero Trust Architecture knowledge.

Responsibilities

• Design and implement enterprise-wide security controls and frameworks, using approved AI and automation to improve security outcomes
• Embed security controls into CI/CD pipelines (SAST, SCA, DAST, container scanning) and enable secure SDLC practices
• Collaborate across teams to champion secure development practices and responsible use of AI-enabled security workflows
• Lead vulnerability assessments, code reviews and security audits across infrastructure and applications, maintaining appropriate human review and escalation pathways
• Develop and evolve security standards, engineering patterns and data protection strategies

Skills

Security architectures

Cloud security

Secure coding

IAM

Python

Bash

PowerShell

Go

Zero Trust

AI tooling

Tools

Palo Alto

Microsoft security ecosystems

SAST

SCA

DAST

CI/CD tooling

SIEM

Job description

Capco in London is seeking a Principal Security Engineer to lead the design and implementation of secure systems across cloud and on-premise platforms. You’ll embed security-by-design principles in the SDLC, collaborate with engineering and client teams, and integrate automated tooling to strengthen resilience while maintaining human review and escalation where needed.

You’ll work with cross-functional teams to champion secure development practices, lead vulnerability assessments, code reviews,