Senior UI/UX Engineer

Senior UI/UX Engineer

Our Client is a leading global financial markets infrastructure and data provider. Their purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

The platform is a strategic automation and operational resilience initiative, giving operations and leadership teams a single, trusted view over hundreds of automated checks and jobs that used to be run and tracked manually. The UI/UX Engineer owns how that operational picture is presented: from executive summary through to individual check evidence, across a growing set of independently built, permission-gated product areas.

We're building this on a Node.js backend serving multiple independent frontend applications, with a shared internal design system and clear rules about which team owns which part of the product.

Responsibilities

• We are looking for UI/UX Engineer to own frontend delivery within a large modular operations platform, building accessible, design-system-driven interfaces across multiple independently built product areas. Comfortable working directly with product and operational stakeholders to translate ambiguous requirements into shipped, WCAG-compliant UI, while respecting strict ownership boundaries between teams and clearly defined API contracts. Able to design a best-in-class experience for several different user types (e.g. executives, operations analysts, on-call engineers) even when requirements aren't fully defined up front, using judgement to fill the gaps rather than waiting for a complete spec.

• Taking ownership of a module's end-to-end UI/UX, from ambiguous requirements to shipped, accessible interface

• Engaging directly with operations or business stakeholders to understand workflows and translate them into interface design

• Designing best-in-class interfaces for multiple distinct user types (e.g. leadership, operations, engineering) from partial or evolving requirements, making sound design decisions without waiting for fully specified requirements

• Building production frontend using the shared internal design system and each product area's own conventions

• Reducing operational risk and confusion by making status, exceptions and evidence clear, truthful and accessible

Skills

• Must have

Mandatory Competencies:

• Ownership (CRITICAL)

• Has taken ownership of a UI/UX delivery from concept to production. Drove work independently with minimal direction. Shipped interfaces that replaced manual reporting, ad hoc dashboards or spreadsheet-based views.

• Stakeholder Engagement (CRITICAL)

• Comfortable reaching out directly to operations or business teams. Proactively gathers requirements and iterates on design based on direct user feedback rather than waiting for a spec to be handed over. Documents inputs, states and edge cases with the people who do the work.

• Accessible, Design-System-Driven UI (CRITICAL)

• Has built production UI (not prototypes) using a shared component library and design tokens. Worked within clear boundaries between product areas — no shortcuts that reach into another team's interface, styling or state.

• Designing for Multiple Personas Without Full Requirements (CRITICAL)

• Can design a best-in-class operations UI that serves several different audiences (e.g. leadership summary views vs. hands-on operational detail views) with different needs, comfortable making sound design judgement calls when requirements are incomplete, ambiguous, or still evolving, rather than needing a fully black-and-white spec before starting.

• Process Understanding & Interaction Design

• Can understand operational workflows and identify how status, exceptions and evidence should be surfaced. Works with ops teams to simplify complex information. Designs maintainable, observable, truthful loading/empty/error states.

Mandatory Technical Skills:

• Languages: JavaScript, TypeScript, HTML/CSS, JSX

• Frontend Frameworks: React 18, native Web APIs, consistent navigation and layout patterns shared across product areas

• Design System: Radix UI, Base UI, ShadCN-style primitives, class-variance-authority, clsx, tailwind-merge, shared internal component library used across all product areas

• Styling: Tailwind CSS, strict CSS naming conventions to prevent style clashes between product areas, design tokens, CSS custom properties

• Build Tooling: esbuild, Vite, Node.js build scripts, automated build and deployment of independent frontend bundles, asset manifests, caching strategies

• Accessibility: WCAG 2.x, ARIA semantics, roving tabindex, focus management, reduced-motion support, screen-reader testing

• Data Visualization: Grafana Scenes, RxJS, Recharts, timeline and execution-history style visual components

• Architecture: Clear boundaries between product areas, dynamic loading of features on demand, consistent lifecycle for loading/unloading screens, centrally managed navigation and browser history, routed subpages with canonical breadcrumbs

• API Integration: REST APIs, runtime response validation, request cancellation support, purpose-built, need-to-know API responses (never exposing full backend data to the browser)

• Security & Compliance: CSP, Trusted Types, feature visibility controlled and enforced by the backend, not just hidden in the UI, no client-side credential handling

• Testing: Node test runner, accessibility assertions, component/contract tests, automated checks to keep frontend and backend feature lists in sync

• Collaboration: Design handoff, stakeholder demos, cross-team alignment, documentation-first change management

• Nice to have

• Grafana / Scenes dashboarding experience (used by our monitoring product area)

• Financial services or regulated environment experience

• Operational resilience / SRE concepts (status semantics, alerting, monitoring dashboards)

• Data visualisation for time-series or execution-timeline data

• Experience contributing to or maintaining a shared component library across multiple products

• Modernising manual/spreadsheet-based reporting into a web UI

• English: C1 Advanced

• Seniority: Senior

• Location: London

• Req. VR-125258

• UI/UX Design

• BCM Industry

• 29/09/2026