Principal Security Engineer

Contract type
Ongoing
Work mode
Hybrid · London, United Kingdom
Experience
Lead / principal · Not stated

Level inferred from job title

Job description

A Principal Security Engineer role at Capco leading hands-on security engineering delivery for clients across financial services and other complex environments, spanning application, cloud and DevSecOps security.

At a glance

Employment
Full-time · Employee (employment agreement)
Work mode
Hybrid · London, United Kingdom

What you'll do

  • Lead the design, implementation and technical assurance of secure solutions across applications, cloud platforms and delivery pipelines while staying hands-on with complex engineering.
  • Work directly with clients to understand requirements, lead technical workshops and shape security designs, delivery plans and proposals.
  • Embed security-by-design across applications, APIs, cloud workloads and the secure SDLC through threat modelling and CI/CD controls.
  • Build and integrate scalable security automation using scripting, APIs, Infrastructure as Code and policy as code.
  • Lead technical workstreams or specialist assignments, assure engineering quality and operational handover, mentor engineers and develop reusable standards.
  • Leverage approved AI-enabled tools and automation to enhance security engineering efficiency with appropriate human oversight and guardrails.

What we're looking for

  • Proven hands-on security engineering delivery and technical leadership including secure design, engineering assurance, client engagement and mentoring.
  • Deep implementation expertise in one or more of Application & Product Security, Cloud & Platform Security or DevSecOps, with working knowledge of the others.
  • Practical experience securing applications, APIs, cloud workloads or pipelines, with knowledge of threat modelling, vulnerability management and secure SDLC.
  • Experience with at least one major cloud platform (Azure, AWS or GCP) and cloud-native security principles including IaC, containers and workload identities.
  • Strong security automation capability with scripting, APIs and CI/CD tooling, plus IaC or policy as code and integrating security tools into workflows.
  • Broad awareness of network and infrastructure security, IAM, monitoring and data-protection controls, able to explain technical trade-offs to clients.
  • Strong understanding of security standards and best practices including ISO 27001, NIST and OWASP, translating requirements into practical engineering controls.

Nice to have

  • Experience in financial services, energy or other regulated sectors, and certifications such as CISSP, CSSLP, CCSP or cloud security credentials.
  • Depth across multiple priority engineering domains, software supply-chain or container security, technical presales, or security engineering for AI-enabled systems.

Your team

Technology & Engineering

Benefits

Family-friendly leave including maternity, adoption, shared parental leave and paid leave for sickness, pregnancy loss, fertility treatment, menopause and bereavement.

  • Discretionary bonus, competitive pension, health insurance, life insurance and critical illness cover.
  • Mental health support including CareFirst, Unmind, Aviva consultations and in-house first aiders.
  • Eight complimentary backup care sessions for emergency childcare or elder care.
  • Five weeks of annual leave with the option to buy or sell holiday days.
  • Minimum 40 hours of training annually and a Business Coach from Day One.
  • Online GP services.
  • Perks including Wellhub (Gympass), travel insurance, Tastecard, season ticket loans, Cycle to Work and dental insurance.

Apply

About Capco

A consulting firm delivering security engineering and secure digital transformation for financial institutions and other major clients.

Key facts

  • Consulting
  • Collaborative, entrepreneurial consulting culture with continuous learning, training and certification opportunities.
  • Helps shape secure digital transformation across financial services and energy.

What they value

  • Belief that being yourself is your greatest strength, with a #BeYourselfAtWork culture encouraging individuality and collaboration.