Lead Core Banking Architect & Strategic Tech Leader

EY UK; Greater London; Hybrid; GBP 110,000 - 150,000; Full time

Job summary

EY UK is seeking a Senior Manager – Core Banking Architect to own target‑state architecture for core banking transformations. You will define domain models and contracts, API/event patterns, and non‑functional controls to enable safe, interoperable delivery and AI use cases without compromising resilience or compliance.

In this hybrid role, you’ll lead architecture across customer, ledger, lending and treasury domains, shape roadmaps, govern design quality, and mentor teams while contributing to

Qualifications

• 8+ years in solution/domain architecture with significant core‑modernisation experience.
• Mastery of domain‑driven design, integration via APIs/events, and modern platform patterns (microservices, containers, cloud).
• Stakeholder leadership with CIO/Chief Architect/COO teams; crisp written architecture artefacts.
• Fluency in NFR engineering (resilience, security, observability) and release governance in regulated environments.

Responsibilities

• Define target architectures for core and adjacent domains (customer, ledger, lending, treasury) with clear API/event contracts and data responsibilities.
• Lead strategic optioning and roadmaps (progressive modernisation vs replacement) with credible delivery pathways.
• Govern design quality and NFRs (availability, performance, security, operability); manage design risks and decisions.
• Embed AI‑ready patterns (secure data/logic exposure, test harnesses, guardrails for non‑deterministic components).
• Shape and deliver scalable, resilient, end‑to‑end solutions, ensuring designs are fully considered, robust and aligned to agreed architectural standards.
• Act as the conduit between business and technology functions; translate outcomes into clear design options and actionable plans.
• Provide high‑quality guidance and documentation to enable a rapid, secure path from design to build/run.
• Contribute to business development: shape proposals, provide solution credibility in pursuits, and support mobilisation of wins.
• Develop people and communities of practice; coach junior colleagues and embed reusable patterns, assets and playbooks.

Skills

Core banking architecture

Domain-driven design

API patterns

Microservices

Cloud platforms

Stakeholder leadership

Tools

Kubernetes

Containers

Cloud platforms

Job description

EY UK is seeking a Senior Manager – Core Banking Architect to own target‑state architecture for core banking transformations. You will define domain models and contracts, API/event patterns, and non‑functional controls to enable safe, interoperable delivery and AI use cases without compromising resilience or compliance.

In this hybrid role, you’ll lead architecture across customer, ledger, lending and treasury domains, shape roadmaps, govern design quality, and mentor teams while contributing to