Full-time · Hybrid

Principal Artificial Intelligence (AI) Platform Engineer/Architect

W
Hiring company

WTW

Reigate, England, United Kingdom · Posted 13 April 2026

The role

Overview

As a Principal AI Platform Engineer, you will serve as the primary architect and builder for a transformative initiative aimed at revolutionizing how 500+ engineers deliver value. This is a high-impact role where you will design the scalable infrastructure and SDKs that embed artificial intelligence into every stage of the Software Development Life Cycle (SDLC). Your daily work will involve a sophisticated blend of high-level strategic visioning and hands-on implementation, creating the self-service tooling, RAG architectures, and agentic orchestration frameworks that allow development teams to integrate AI safely and efficiently. You aren't just building tools; you are defining the future of developer experience (DevEx) at an enterprise scale. Joining WTW means becoming part of a global leader that is aggressively investing in AI-augmented engineering. You will work within a culture that balances rigorous governance with rapid innovation, collaborating closely with security, data, and compliance teams to build robust guardrails that don't stifle creativity. This role is positioned at the intersection of platform engineering and cutting-edge AI research, offering a unique vantage point to influence the technical direction of a massive engineering organization. You will act as a mentor and evangelist, hosting office hours and presentations to drive a fundamental shift in how the company approaches software creation. This position offers an exceptional growth trajectory for a senior engineer looking to cement their legacy as an AI transformation leader. By establishing the patterns for model evaluation, prompt engineering, and automated testing, you will be the go-to authority on AI implementation across the firm. Success in this role means significantly reducing onboarding times and accelerating delivery cycles, proving the tangible value of AI in a complex corporate environment. It is a rare opportunity to lead a large-scale technological evolution from the ground up while staying deeply connected to the code.

The hiring side

About WTW

WTW is an enterprise organisation working in professional services / insurance, based in Reigate, England, United Kingdom.

Industry

Professional Services / Insurance

Size

Enterprise

Location

Reigate, England, United Kingdom

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What they need

Requirements & Skills

Key Responsibilities

  • Define the vision for AI-enabled SDLC practices across the enterprise
  • Design and build scalable AI platform infrastructure and self-service tooling
  • Establish patterns for RAG design, model versioning, and agentic orchestration
  • Partner with cross-functional teams to operationalize AI tools for code generation and testing
  • Implement governance and monitoring systems to ensure safe AI adoption

Essential

  • Extensive background in software or platform engineering across multiple SDLC phases
  • Proven track record of leading large-scale, complex technical initiatives
  • Demonstrated expertise in infrastructure, developer tools, and API design
  • Recent specialization in AI technologies and implementation
  • Ability to design scalable AI platform infrastructure including SDKs and deployment pipelines
  • Experience with RAG/retrieval design and agentic orchestration

Preferred

  • Experience driving Developer Experience (DevEx) improvements in large organizations
  • Background in evangelizing new technical practices through public speaking or internal workshops
  • Experience in incident response and platform hardening

Key Skills

AI/ML ImplementationPlatform EngineeringSoftware Development Life Cycle (SDLC) ArchitectureSDK DevelopmentPrompt EngineeringModel Versioning & EvaluationData Pipeline ManagementObservability & MonitoringGovernance & Security Guardrails

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People to Know

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Perks

Benefits & perks

  • Hybrid working model
  • Opportunity to lead enterprise-wide AI transformation
  • Collaborative and highly skilled engineering environment
  • Access to a global talent community

Next step

Apply now

Found via careers.wtwco.com

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