Senior Enterprise Architect-Enterprise Architect​/Segment lead

Role – Senior Enterprise Architect
Technology – Enterprise Architect/Segment lead
Location – UK/Europe
Business Unit – STG
Compensation – Competitive (including bonus)
Job Description

AI-First Solutioning, Human + Agent Ways of Working & Large-Scale Modernisation

This is a senior strategic role within the Enterprise Strategic Architecture practice, focused on defining and delivering next‑generation digital transformation programs for leading global organisations. The successful candidate will bring together deep technology expertise and strong business acumen to help clients navigate complex, large‑scale modernisation initiatives. As AI becomes central to how enterprises transform, this role is expanding in scope: the architect must be equally comfortable designing cloud‑native platforms, structuring human and agent collaborative workflows, and embedding AI‑driven capabilities as first‑class components of the overall solution.

You will collaborate closely with sales and delivery teams across the full programme lifecycle — from shaping solutions during presales through to governing technical quality in delivery. You will engage with CDOs, CTOs, and senior digital leaders at client organisations, contribute to industry thinking through published viewpoints and speaking engagements, and play an active role in identifying emerging technology opportunities that can be developed into compelling propositions for the market.

• Strategic Thinking – Candidate can articulate where AI agents replace human tasks vs. augment them in a $10M+ transformation context. Can draw a human+agent operating model for a business process — showing handoff logic, oversight points, and accountability chains. Understands that LLM inference is now a line item in programme budgets and can estimate it at ROM level for a given use case volume.
• Design Depth – Has personally designed or reviewed an agentic system in production — e.g. a multi‑step reasoning pipeline, an autonomous code review agent, or a RAG‑powered enterprise knowledge layer. Can explain prompt architecture decisions (system prompt structuring, context compression strategies, few‑shot vs. zero‑shot trade‑offs) and how these affect both quality and cost. Understands model selection trade‑offs — when to use frontier models vs.
  
  fine‑tuned smaller models vs. cached completions.
• Token Optimization Fluency – Has ope rationalised token efficiency at scale — structured prompt libraries, semantic caching, chunk sizing for RAG pipelines, output length controls, batching strategies. Can model cost‑per‑transaction for an AI‑enabled workflow and present that as part of a business case. Understands how token spend interacts with context window limits across model families (GPT‑4o, Claude, Gemini) and can make architecture trade‑offs accordingly.

• Agentic architecture design – Multi‑agent orchestration, tool‑use design, human‑in‑the‑loop checkpoints, agent failure modes and recovery
• Human + agent workflow design – Task decomposition across human and AI agents; escalation paths; accountability mapping in regulated environments
• Expertise in leveraging coding agents – Git Hub Copilot, Claude, Devin.ai and similar – to accelerate software delivery within a structured, governed engineering lifecycle
• Design and governance of automated delivery pipelines using tools such as Harness, Git Hub Actions, ArgoCD and Tekton; trunk‑based development, progressive delivery and release automation
• Full‑stack application development – Architecture and delivery of modern full‑stack applications; proficiency across frontend frameworks, API layers, backend services, and data tiers at enterprise scale
• Modern CI/CD & delivery pipelines – Design and governance of automated delivery pipelines using tools such as Harness, Git Hub Actions, ArgoCD and Tekton; trunk‑based development, progressive delivery and release automation
• High‑scalability integration – Architecting event‑driven and streaming integration at scale using Apache Kafka and Kafka Streams; asynchronous messaging patterns, schema registries, and real‑time data pipelines across distributed systems
• No
  
  SQL & enterprise…