Software Architect at Sanderson, London Area, £550–£570 per day

UI Architect

Global Financial Services / Payments Client

Location: London - 2 days per week

Rate: £550–£570 per day

Contract: 6 months initial

IR35 Status: Outside IR35

Role Overview

We are supporting a global financial services organisation operating in cross-border payments and emerging markets as they continue a large-scale technology transformation.

They are looking for an experienced UI Architect to lead the design and delivery of scalable, modern front-end platforms aligned to a microservices architecture. This is a hands-on architecture role with responsibility for defining standards, driving best practice and shaping the frontend ecosystem across multiple products.

Key Responsibilities

• Define and own frontend architecture across a microservices-based platform
• Design scalable UI solutions aligned to API-first backend services
• Establish reusable components, UI standards and enterprise design systems
• Define integration approaches with RESTful and event-driven services
• Ensure performance, security, and responsiveness across web applications
• Embed CI/CD, testing, and DevOps best practices within frontend teams
• Support containerised deployments using Docker and Kubernetes
• Mentor engineers and provide technical leadership across UI development
• Drive adoption of AI-assisted development approaches including prompt engineering and tools such as Copilot
• Collaborate with product, UX, backend and DevOps teams across the full delivery lifecycle

Required Experience

• Strong experience in UI or Frontend Architecture within complex environments
• Expertise in React, JavaScript (ES6+), TypeScript, HTML5 and CSS3
• Experience designing SPA or micro-frontend architectures
• Strong understanding of API integration (REST, API gateway patterns, BFF)
• Experience working in cloud environments such as AWS or Azure
• Exposure to Docker, Kubernetes and CI/CD pipelines
• Strong focus on performance optimisation techniques such as lazy loading and code splitting
• Experience using AI development tools (e.g., GitHub Copilot) within engineering workflows

Nice to Have

• Event-driven architecture experience (Kafka, async patterns)
• Observability tools (Prometheus, Grafana, ELK)
• Frontend security (OAuth2, JWT)
• Automated testing frameworks (Cypress, Playwright, Jest)
• Design systems and tooling (Storybook, Figma)
• Experience in financial services, fintech, or payments environments