Principal Architect, Enterprise Architecture

American Express

. Define and advance the AI and agentic platform architecture strategy, including agentic security and MCP ecosystem enablement .

Posted 10/27/2026full-timeLondon • United KingdomLeadWebsite

Core Competencies

Role fit

Core Competencies

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Expertise in defining and advancing AI architecture strategies, including generative AI and intelligent automation, while ensuring alignment with enterprise standards and compliance. Proven ability to lead complex platform implementations and mentor technical teams in a large-scale, matrixed environment.

Highest-signal resume keywords

AI Architecture StrategyEnterprise-Grade Platform DesignLarge-Scale System ArchitectureGenerative AI ImplementationArchitecture Decision Records

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Applicant Tracking System Keywords

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Hard Skills

Technology ArchitectureSoftware EngineeringDistributed SystemsCloud-Native PlatformsData-Intensive ApplicationsScalable AI SystemsArchitecture StandardsTechnical LeadershipOKRs CreationArchitecture Assessments

Soft Skills

Influencing Senior LeadersOutcome-Oriented LeadershipMentoringCommunication of Complex Concepts

Certifications & Qualifications

Bachelor’s Degree in Computer ScienceAdvanced Degree Preferred

Industry Keywords

AI-Enabled PlatformsIntelligent AutomationAgentic SystemsEnterprise Architecture PlaybookComplianceRisk ManagementModel Governance

Tech Stack

Tools & technologies

CloudDistributed Systems

About the role

Key responsibilities & impact

Define and advance the AI and agentic platform architecture strategy, including agentic security and MCP ecosystem enablement
Support architecture needs across Global Servicing & Corporate Technology, International Consumer Services Technology, and other lines of business
Provide hands-on architectural thought leadership for complex or novel AI use cases from exploration through production deployment and scale
Establish reference architectures, reusable patterns, standards, and guardrails for generative AI, agentic systems, intelligent automation, and emerging technologies
Ensure AI architectures align with enterprise, security, privacy, risk, compliance, regulatory, and model-governance requirements
Shape technical direction for AI-enabled platforms and capabilities
Identify and prioritize high-impact AI opportunities improving automation, customer and colleague experiences, operational efficiency, resilience, and system performance
Influence enterprise architecture standards and evolve the Enterprise Architecture Playbook
Lead architecture reviews and provide actionable guidance to improve design quality, reduce risk, and accelerate responsible adoption
Define measurable architecture outcomes using metrics, assessments, and OKRs
Lead prototypes and production implementations for mission-critical systems
Modernize and manage programs involving complex platforms and ecosystems
Communicate complex AI and architecture concepts to technical and executive audiences
Mentor architects and senior engineers

Requirements

What you’ll need

15+ years of progressive experience in technology architecture, software engineering, or a comparable discipline within a large-scale, complex environment
Demonstrated experience designing and delivering enterprise-grade platforms, products, or technology capabilities
Deep knowledge of large-scale system architecture, including distributed systems, APIs, cloud-native platforms, data-intensive applications, and hybrid technology environments
Bachelor’s degree in computer science, computer science engineering, or related field required; advanced degree preferred
Experience defining or implementing enterprise AI architecture, including generative AI, machine learning, intelligent automation, or agentic systems
Deep understanding of production-grade and scalable AI system considerations, including scalability, latency, reliability, security, observability, evaluation, lifecycle management, and cost optimization
Experience creating reference architectures, reusable patterns, technical standards, architecture decision records, and engineering guardrails
Experience creating OKRs, ROIs, and architectural assessments
Experience with development and governance of architecture standards, guidelines, and Architecture Decision Records (ADRs)
Experience from leading technology or AI-forward organizations, translating emerging innovations into enterprise-scale solutions
Proven ability to influence senior leaders, architects, engineers, product teams, and governance functions across a complex, matrixed organization
Ability to operate as a horizontal technical leader and complex platform and technical product manager, influencing multiple teams and domains without direct ownership
Demonstrated outcome-oriented leadership, including managing large and complex programs under time and budget constraints
Employment eligibility to work with American Express in the UK is required; the company will not pursue visa sponsorship

Benefits

Comp & perks

Competitive base salaries
Bonus incentives
Support for financial well-being and retirement
Comprehensive medical, dental, vision, life insurance, and disability benefits (depending on location)
Flexible working model with hybrid, onsite or virtual arrangements depending on role and business need
Generous paid parental leave policies (depending on your location)
Free access to global on-site wellness centers staffed with nurses and doctors (depending on location)
Free and confidential counseling support through our Healthy Minds program
Career development and training opportunities